cmd/head.go

@@ -63,11 +63,12 @@ func startHeadTracking() {
 	log.Info("The Beacon Client has booted successfully!")
 	// Capture head blocks
 	go Bc.CaptureHead()
+	kgCtx, KgCancel := context.WithCancel(context.Background())
 	if viper.GetBool("kg.processKnownGaps") {
 		go func() {
 			errG := new(errgroup.Group)
 			errG.Go(func() error {
-				errs := Bc.ProcessKnownGaps(viper.GetInt("kg.maxKnownGapsWorker"))
+				errs := Bc.ProcessKnownGaps(kgCtx, viper.GetInt("kg.maxKnownGapsWorker"))
 				if len(errs) != 0 {
 					log.WithFields(log.Fields{"errs": errs}).Error("All errors when processing knownGaps")
 					return fmt.Errorf("Application ended because there were too many error when attempting to process knownGaps")
@@ -81,7 +82,7 @@ func startHeadTracking() {
 	}
 
 	// Shutdown when the time is right.
-	err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
+	err = shutdown.ShutdownHeadTracking(ctx, KgCancel, notifierCh, maxWaitSecondsShutdown, Db, Bc)
 	if err != nil {
 		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
 	} else {

cmd/historic.go

@@ -60,10 +60,11 @@ func startHistoricProcessing() {
 		serveProm(addr)
 	}
 
-	errG, _ := errgroup.WithContext(context.Background())
+	hpContext, hpCancel := context.WithCancel(context.Background())
 
+	errG, _ := errgroup.WithContext(context.Background())
 	errG.Go(func() error {
-		errs := Bc.CaptureHistoric(viper.GetInt("bc.maxHistoricProcessWorker"))
+		errs := Bc.CaptureHistoric(hpContext, viper.GetInt("bc.maxHistoricProcessWorker"))
 		if len(errs) != 0 {
 			if len(errs) != 0 {
 				log.WithFields(log.Fields{"errs": errs}).Error("All errors when processing historic events")
@@ -73,11 +74,12 @@ func startHistoricProcessing() {
 		return nil
 	})
 
+	kgContext, kgCancel := context.WithCancel(context.Background())
 	if viper.GetBool("kg.processKnownGaps") {
 		go func() {
 			errG := new(errgroup.Group)
 			errG.Go(func() error {
-				errs := Bc.ProcessKnownGaps(viper.GetInt("kg.maxKnownGapsWorker"))
+				errs := Bc.ProcessKnownGaps(kgContext, viper.GetInt("kg.maxKnownGapsWorker"))
 				if len(errs) != 0 {
 					log.WithFields(log.Fields{"errs": errs}).Error("All errors when processing knownGaps")
 					return fmt.Errorf("Application ended because there were too many error when attempting to process knownGaps")
@@ -91,7 +93,7 @@ func startHistoricProcessing() {
 	}
 
 	// Shutdown when the time is right.
-	err = shutdown.ShutdownHistoricProcessing(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
+	err = shutdown.ShutdownHistoricProcessing(ctx, kgCancel, hpCancel, notifierCh, maxWaitSecondsShutdown, Db, Bc)
 	if err != nil {
 		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
 	} else {

internal/shutdown/shutdown.go

@@ -40,7 +40,7 @@ func ShutdownServices(ctx context.Context, notifierCh chan os.Signal, waitTime t
 }
 
 // Wrapper function for shutting down the head tracking process.
-func ShutdownHeadTracking(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
+func ShutdownHeadTracking(ctx context.Context, kgCancel context.CancelFunc, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
 	return ShutdownServices(ctx, notifierCh, waitTime, DB, BC, map[string]gracefulshutdown.Operation{
 		// Combining DB shutdown with BC because BC needs DB open to cleanly shutdown.
 		"beaconClient": func(ctx context.Context) error {
@@ -50,7 +50,7 @@ func ShutdownHeadTracking(ctx context.Context, notifierCh chan os.Signal, waitTi
 				loghelper.LogError(err).Error("Unable to trigger shutdown of head tracking")
 			}
 			if BC.KnownGapsProcess != (beaconclient.KnownGapsProcessing{}) {
-				err = BC.StopKnownGapsProcessing()
+				err = BC.StopKnownGapsProcessing(kgCancel)
 				if err != nil {
 					loghelper.LogError(err).Error("Unable to stop processing known gaps")
 				}
@@ -61,17 +61,17 @@ func ShutdownHeadTracking(ctx context.Context, notifierCh chan os.Signal, waitTi
 }
 
 // Wrapper function for shutting down the head tracking process.
-func ShutdownHistoricProcessing(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
+func ShutdownHistoricProcessing(ctx context.Context, kgCancel, hpCancel context.CancelFunc, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
 	return ShutdownServices(ctx, notifierCh, waitTime, DB, BC, map[string]gracefulshutdown.Operation{
 		// Combining DB shutdown with BC because BC needs DB open to cleanly shutdown.
 		"beaconClient": func(ctx context.Context) error {
 			defer DB.Close()
-			err := BC.StopHistoric()
+			err := BC.StopHistoric(hpCancel)
 			if err != nil {
 				loghelper.LogError(err).Error("Unable to stop processing historic")
 			}
 			if BC.KnownGapsProcess != (beaconclient.KnownGapsProcessing{}) {
-				err = BC.StopKnownGapsProcessing()
+				err = BC.StopKnownGapsProcessing(kgCancel)
 				if err != nil {
 					loghelper.LogError(err).Error("Unable to stop processing known gaps")
 				}

internal/shutdown/shutdown_test.go

@@ -72,8 +72,9 @@ var _ = Describe("Shutdown", func() {
 		Context("When Channels are empty,", func() {
 			It("Should Shutdown Successfully.", func() {
 				go func() {
+					_, cancel := context.WithCancel(context.Background())
 					log.Debug("Starting shutdown chan")
-					err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+					err = shutdown.ShutdownHeadTracking(ctx, cancel, notifierCh, maxWaitSecondsShutdown, DB, BC)
 					log.Debug("We have completed the shutdown...")
 					Expect(err).ToNot(HaveOccurred())
 				}()
@@ -84,8 +85,9 @@ var _ = Describe("Shutdown", func() {
 				shutdownCh := make(chan bool)
 				//log.SetLevel(log.DebugLevel)
 				go func() {
+					_, cancel := context.WithCancel(context.Background())
 					log.Debug("Starting shutdown chan")
-					err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+					err = shutdown.ShutdownHeadTracking(ctx, cancel, notifierCh, maxWaitSecondsShutdown, DB, BC)
 					log.Debug("We have completed the shutdown...")
 					Expect(err).ToNot(HaveOccurred())
 					shutdownCh <- true
@@ -118,7 +120,8 @@ var _ = Describe("Shutdown", func() {
 				//log.SetLevel(log.DebugLevel)
 				go func() {
 					log.Debug("Starting shutdown chan")
-					err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+					_, cancel := context.WithCancel(context.Background())
+					err = shutdown.ShutdownHeadTracking(ctx, cancel, notifierCh, maxWaitSecondsShutdown, DB, BC)
 					log.Debug("We have completed the shutdown...")
 					Expect(err).To(MatchError(gracefulshutdown.TimeoutErr(maxWaitSecondsShutdown.String())))
 					shutdownCh <- true

pkg/beaconclient/beaconclient.go

@@ -69,7 +69,7 @@ type BeaconClient struct {
 	// This value is lazily updated. Therefore at times it will be outdated.
 	LatestSlotInBeaconServer    int64
 	PerformHistoricalProcessing bool               // Should we perform historical processing?
-	HistoricalProcess           historicProcessing // object keeping track of historical processing
+	HistoricalProcess           HistoricProcessing // object keeping track of historical processing
 }
 
 // A struct to keep track of relevant the head event topic.

pkg/beaconclient/capturehead_test.go

@@ -60,6 +60,22 @@ var (
 	maxRetry                int    = 120
 
 	TestEvents = map[string]Message{
+		"0": {
+			HeadMessage: beaconclient.Head{
+				Slot:                      "0",
+				Block:                     "0x4d611d5b93fdab69013a7f0a2f961caca0c853f87cfe9595fe50038163079360",
+				State:                     "0x7e76880eb67bbdc86250aa578958e9d0675e64e714337855204fb5abaaf82c2b",
+				CurrentDutyDependentRoot:  "",
+				PreviousDutyDependentRoot: "",
+				EpochTransition:           false,
+				ExecutionOptimistic:       false,
+			},
+			SignedBeaconBlock:    filepath.Join("ssz-data", "0", "signed-beacon-block.ssz"),
+			BeaconState:          filepath.Join("ssz-data", "0", "beacon-state.ssz"),
+			CorrectMhKey:         "/blocks/QHVAEQRQPA2GINRRGFSDKYRZGNTGIYLCGY4TAMJTME3WMMDBGJTDSNRRMNQWGYJQMM4DKM3GHA3WGZTFHE2TSNLGMU2TAMBTHAYTMMZQG44TGNRQ",
+			CorrectParentRoot:    "0x0000000000000000000000000000000000000000000000000000000000000000",
+			CorrectEth1BlockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
+		},
 		"100-dummy": {
 			HeadMessage: beaconclient.Head{
 				Slot:                      "100",
@@ -121,6 +137,9 @@ var (
 			TestNotes:            "An easy to process Phase 0 block",
 			SignedBeaconBlock:    filepath.Join("ssz-data", "100", "signed-beacon-block.ssz"),
 			BeaconState:          filepath.Join("ssz-data", "100", "beacon-state.ssz"),
+			CorrectMhKey:         "/blocks/QHVAEQBQGQ4TKNJUGAYDGNZRGM2DOZJSGZTDMMLEG5QTIYTCMRQTKYRSGNTGCMDCGI2WINLGMM2DMNJRGYYGMMTBHEZGINJSME3DGYRZGE4WE",
+			CorrectParentRoot:    "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1",
+			CorrectEth1BlockHash: "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1",
 		},
 		"101": {
 			HeadMessage: beaconclient.Head{
@@ -135,6 +154,8 @@ var (
 			TestNotes:            "An easy to process Phase 0 block",
 			SignedBeaconBlock:    filepath.Join("ssz-data", "101", "signed-beacon-block.ssz"),
 			BeaconState:          filepath.Join("ssz-data", "101", "beacon-state.ssz"),
+			CorrectEth1BlockHash: "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1",
+			CorrectMhKey:         "/blocks/QHVAEQRQPBQWEZJRME4TOMTFGUYTEMJYGJSDANDGGBSDIYJVMM4WGMRVMY4WKZJVG5RTEZJZMQYGMZRTMY2GGNDDHAZGMZBUGJSDCM3EGMYTAOBT",
 		},
 		"2375703-dummy": {
 			HeadMessage: beaconclient.Head{
@@ -179,16 +200,20 @@ var (
 			TestNotes:            "An easy to process Altair Block",
 			SignedBeaconBlock:    filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
 			BeaconState:          filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
+			CorrectEth1BlockHash: "0xd74b1c60423651624de6bb301ac25808951c167ba6ecdd9b2e79b4315aee8202",
+			CorrectParentRoot:    "0x08736ddc20b77f65d1aa6301f7e6e856a820ff3ce6430ed2c3694ae35580e740",
+			CorrectMhKey:         "",
 		},
 		"3797056": {
 			HeadMessage: beaconclient.Head{
 				Slot:                     "3797056",
 				Block:                    "",
-				State:                    "0xb6215b560273af63ec7e011572b60ec1ca0b0232f8ff44fcd4ed55c7526e964e",
+				State:                    "",
 				CurrentDutyDependentRoot: "", PreviousDutyDependentRoot: "", EpochTransition: false, ExecutionOptimistic: false},
 			TestNotes: "An easy to process Altair Block",
-			SignedBeaconBlock: filepath.Join("ssz-data", "2375703", "signed-beacon-block.ssz"),
-			BeaconState:       filepath.Join("ssz-data", "2375703", "beacon-state.ssz"),
+			// The file below should not exist, this will trigger an error message and 404 response from the mock.
+			SignedBeaconBlock: filepath.Join("ssz-data", "3797056", "should-not-exist.txt"),
+			BeaconState:       filepath.Join("ssz-data", "3797056", "beacon-state.ssz"),
 		},
 	}
 	TestConfig = Config{
@@ -219,6 +244,9 @@ type Message struct {
 	MimicConfig          *MimicConfig      // A configuration of parameters that you are trying to
 	SignedBeaconBlock    string            // The file path output of an SSZ encoded SignedBeaconBlock.
 	BeaconState          string            // The file path output of an SSZ encoded BeaconState.
+	CorrectMhKey         string            // The correct MhKey
+	CorrectParentRoot    string            // The correct parent root
+	CorrectEth1BlockHash string            // The correct eth1blockHash
 }
 
 // A structure that can be utilized to mimic and existing SSZ object but change it ever so slightly.
@@ -228,7 +256,7 @@ type MimicConfig struct {
 	ForkVersion string // Specify the fork version. This is needed as a workaround to create dummy SignedBeaconBlocks.
 }
 
-var _ = Describe("Capturehead", func() {
+var _ = Describe("Capturehead", Label("head"), func() {
 
 	Describe("Receiving New Head SSE messages", Label("unit", "behavioral"), func() {
 		Context("Correctly formatted Phase0 Block", func() {
@@ -653,8 +681,7 @@ func (tbc TestBeaconNode) SetupBeaconNodeMock(TestEvents map[string]Message, pro
 			id := httpmock.MustGetSubmatch(req, 1)
 			dat, err := tbc.provideSsz(id, "state", dummyParentRoot)
 			if err != nil {
-				Expect(err).NotTo(HaveOccurred())
-				return httpmock.NewStringResponse(404, fmt.Sprintf("Unable to find file for %s", id)), err
+				return httpmock.NewStringResponse(404, fmt.Sprintf("Unable to find file for %s", id)), nil
 			}
 			return httpmock.NewBytesResponse(200, dat), nil
 		},
@@ -667,8 +694,7 @@ func (tbc TestBeaconNode) SetupBeaconNodeMock(TestEvents map[string]Message, pro
 			id := httpmock.MustGetSubmatch(req, 1)
 			dat, err := tbc.provideSsz(id, "block", dummyParentRoot)
 			if err != nil {
-				Expect(err).NotTo(HaveOccurred())
-				return httpmock.NewStringResponse(404, fmt.Sprintf("Unable to find file for %s", id)), err
+				return httpmock.NewStringResponse(404, fmt.Sprintf("Unable to find file for %s", id)), nil
 			}
 			return httpmock.NewBytesResponse(200, dat), nil
 		},

pkg/beaconclient/capturehistoric.go

@@ -18,6 +18,7 @@
 package beaconclient
 
 import (
+	"context"
 	"fmt"
 
 	log "github.com/sirupsen/logrus"
@@ -27,18 +28,18 @@ import (
 )
 
 // This function will perform all the heavy lifting for tracking the head of the chain.
-func (bc *BeaconClient) CaptureHistoric(maxWorkers int) []error {
+func (bc *BeaconClient) CaptureHistoric(ctx context.Context, maxWorkers int) []error {
 	log.Info("We are starting the historical processing service.")
-	bc.HistoricalProcess = historicProcessing{db: bc.Db, metrics: bc.Metrics}
-	errs := handleBatchProcess(maxWorkers, bc.HistoricalProcess, bc.HistoricalProcess.finishProcessing, bc.HistoricalProcess.db, bc.ServerEndpoint, bc.Metrics, bc.CheckDb)
+	bc.HistoricalProcess = HistoricProcessing{db: bc.Db, metrics: bc.Metrics, uniqueNodeIdentifier: bc.UniqueNodeIdentifier}
+	errs := handleBatchProcess(ctx, maxWorkers, bc.HistoricalProcess, bc.HistoricalProcess.db, bc.ServerEndpoint, bc.Metrics, bc.CheckDb)
 	log.Debug("Exiting Historical")
 	return errs
 }
 
 // This function will perform all the necessary clean up tasks for stopping historical processing.
-func (bc *BeaconClient) StopHistoric() error {
+func (bc *BeaconClient) StopHistoric(cancel context.CancelFunc) error {
 	log.Info("We are stopping the historical processing service.")
-	err := bc.HistoricalProcess.releaseDbLocks()
+	err := bc.HistoricalProcess.releaseDbLocks(cancel)
 	if err != nil {
 		loghelper.LogError(err).WithField("uniqueIdentifier", bc.UniqueNodeIdentifier).Error("We were unable to remove the locks from the ethcl.historic_processing table. Manual Intervention is needed!")
 	}
@@ -51,10 +52,10 @@ func (bc *BeaconClient) StopHistoric() error {
 //
 // 2. Known Gaps Processing
 type BatchProcessing interface {
-	getSlotRange(chan<- slotsToProcess) []error       // Write the slots to process in a channel, return an error if you cant get the next slots to write.
-	handleProcessingErrors(<-chan batchHistoricError) // Custom logic to handle errors.
-	removeTableEntry(<-chan slotsToProcess) error     // With the provided start and end slot, remove the entry from the database.
-	releaseDbLocks() error                            // Update the checked_out column to false for whatever table is being updated.
+	getSlotRange(context.Context, chan<- slotsToProcess) []error       // Write the slots to process in a channel, return an error if you cant get the next slots to write.
+	handleProcessingErrors(context.Context, <-chan batchHistoricError) // Custom logic to handle errors.
+	removeTableEntry(context.Context, <-chan slotsToProcess) error     // With the provided start and end slot, remove the entry from the database.
+	releaseDbLocks(context.CancelFunc) error                           // Update the checked_out column to false for whatever table is being updated.
 }
 
 /// ^^^
@@ -89,7 +90,7 @@ type batchHistoricError struct {
 // 4. Remove the slot entry from the DB.
 //
 // 5. Handle any errors.
-func handleBatchProcess(maxWorkers int, bp BatchProcessing, finishCh chan int, db sql.Database, serverEndpoint string, metrics *BeaconClientMetrics, checkDb bool) []error {
+func handleBatchProcess(ctx context.Context, maxWorkers int, bp BatchProcessing, db sql.Database, serverEndpoint string, metrics *BeaconClientMetrics, checkDb bool) []error {
 	slotsCh := make(chan slotsToProcess)
 	workCh := make(chan int)
 	processedCh := make(chan slotsToProcess)
@@ -99,12 +100,16 @@ func handleBatchProcess(maxWorkers int, bp BatchProcessing, finishCh chan int, d
 	// Start workers
 	for w := 1; w <= maxWorkers; w++ {
 		log.WithFields(log.Fields{"maxWorkers": maxWorkers}).Debug("Starting batch  processing workers")
-		go processSlotRangeWorker(workCh, errCh, db, serverEndpoint, metrics, checkDb)
+		go processSlotRangeWorker(ctx, workCh, errCh, db, serverEndpoint, metrics, checkDb)
 	}
 
 	// Process all ranges and send each individual slot to the worker.
 	go func() {
-		for slots := range slotsCh {
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case slots := <-slotsCh:
 				if slots.startSlot > slots.endSlot {
 					log.Error("We received a batch process request where the startSlot is greater than the end slot.")
 					errCh <- batchHistoricError{
@@ -117,39 +122,49 @@ func handleBatchProcess(maxWorkers int, bp BatchProcessing, finishCh chan int, d
 						errProcess: "RangeOrder",
 						slot:       slots.endSlot,
 					}
+				} else if slots.startSlot == slots.endSlot {
+					log.WithField("slot", slots.startSlot).Debug("Added new slot to workCh")
+					workCh <- slots.startSlot
 				} else {
 					for i := slots.startSlot; i <= slots.endSlot; i++ {
 						workCh <- i
+						log.WithField("slot", i).Debug("Added new slot to workCh")
 					}
 					processedCh <- slots
 				}
 			}
+
+		}
 	}()
 
 	// Remove entries, end the application if a row cannot be removed..
 	go func() {
 		errG := new(errgroup.Group)
 		errG.Go(func() error {
-			return bp.removeTableEntry(processedCh)
+			return bp.removeTableEntry(ctx, processedCh)
 		})
 		if err := errG.Wait(); err != nil {
 			finalErrCh <- []error{err}
 		}
 	}()
 	// Process errors from slot processing.
-	go bp.handleProcessingErrors(errCh)
+	go bp.handleProcessingErrors(ctx, errCh)
 
 	// Get slots from the DB.
 	go func() {
-		errs := bp.getSlotRange(slotsCh) // Periodically adds new entries....
+		errs := bp.getSlotRange(ctx, slotsCh) // Periodically adds new entries....
 		if errs != nil {
 			finalErrCh <- errs
 		}
 		finalErrCh <- nil
+		log.Debug("We are stopping the processing of adding new entries")
 	}()
 	log.Debug("Waiting for shutdown signal from channel")
 	select {
-	case <-finishCh:
+	case <-ctx.Done():
+		close(workCh)
+		close(processedCh)
+		close(errCh)
 		log.Debug("Received shutdown signal from channel")
 		return nil
 	case errs := <-finalErrCh:

pkg/beaconclient/capturehistoric_test.go

@@ -15,56 +15,199 @@ import (
 
 var _ = Describe("Capturehistoric", func() {
 
-	Describe("Run the application in historic mode", Label("unit", "behavioral"), func() {
-		Context("Phase0: When we need to process a single block in the ethcl.historic_process table.", func() {
-			It("Successfully Process the Block", func() {
+	Describe("Run the application in historic mode", Label("unit", "behavioral", "historical"), func() {
+		Context("Phase0 + Altairs: When we need to process a multiple blocks in a multiple entries in the ethcl.historic_process table.", func() {
+			It("Successfully Process the Blocks", func() {
 				bc := setUpTest(BeaconNodeTester.TestConfig, "99")
 				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
 				defer httpmock.DeactivateAndReset()
 				BeaconNodeTester.writeEventToHistoricProcess(bc, 100, 101, 10)
-				BeaconNodeTester.runBatchProcess(bc, 2, 100, 101, 0, 0)
+				BeaconNodeTester.runHistoricalProcess(bc, 2, 2, 0, 0, 0)
+				// Run Two seperate processes
+				BeaconNodeTester.writeEventToHistoricProcess(bc, 2375703, 2375703, 10)
+				BeaconNodeTester.runHistoricalProcess(bc, 2, 3, 0, 0, 0)
 
 				time.Sleep(2 * time.Second)
-				validateSlot(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, 3, "proposed")
-				validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, "0x629ae1587895043076500f4f5dcb202a47c2fc95d5b5c548cb83bc97bd2dbfe1", "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1", "/blocks/QHVAEQBQGQ4TKNJUGAYDGNZRGM2DOZJSGZTDMMLEG5QTIYTCMRQTKYRSGNTGCMDCGI2WINLGMM2DMNJRGYYGMMTBHEZGINJSME3DGYRZGE4WE")
-				validateBeaconState(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, "/blocks/QHVAEQRQPBTDEOBWMEYDGNZZMMYDGOBWMEZWGN3CMUZDQZBQGVSDQMRZMY4GKYRXMIZDQMDDMM4WKZDFGE2TINBZMFTDEMDFMJRWIMBWME3WCNJW")
-
-				//validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, "0x629ae1587895043076500f4f5dcb202a47c2fc95d5b5c548cb83bc97bd2dbfe1", "0x8d3f027beef5cbd4f8b29fc831aba67a5d74768edca529f5596f07fd207865e1", "/blocks/QHVAEQBQGQ4TKNJUGAYDGNZRGM2DOZJSGZTDMMLEG5QTIYTCMRQTKYRSGNTGCMDCGI2WINLGMM2DMNJRGYYGMMTBHEZGINJSME3DGYRZGE4WE")
-				//validateBeaconState(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, "/blocks/QHVAEQRQPBTDEOBWMEYDGNZZMMYDGOBWMEZWGN3CMUZDQZBQGVSDQMRZMY4GKYRXMIZDQMDDMM4WKZDFGE2TINBZMFTDEMDFMJRWIMBWME3WCNJW")
+				validatePopularBatchBlocks(bc)
+			})
+		})
+		Context("When the start block is greater than the endBlock", func() {
+			It("Should Add two entries to the knownGaps table", func() {
+				bc := setUpTest(BeaconNodeTester.TestConfig, "99")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				BeaconNodeTester.writeEventToHistoricProcess(bc, 101, 100, 10)
+				BeaconNodeTester.runHistoricalProcess(bc, 2, 0, 0, 2, 0)
+			})
+		})
+		Context("Processing the Genesis block", func() {
+			It("Should Process properly", func() {
+				bc := setUpTest(BeaconNodeTester.TestConfig, "100")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				BeaconNodeTester.writeEventToHistoricProcess(bc, 0, 0, 10)
+				BeaconNodeTester.runHistoricalProcess(bc, 2, 1, 0, 0, 0)
+				validateSlot(bc, BeaconNodeTester.TestEvents["0"].HeadMessage, 0, "proposed")
+				validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["0"].HeadMessage, BeaconNodeTester.TestEvents["0"].CorrectParentRoot, BeaconNodeTester.TestEvents["0"].CorrectEth1BlockHash, BeaconNodeTester.TestEvents["0"].CorrectMhKey)
+				validateBeaconState(bc, BeaconNodeTester.TestEvents["0"].HeadMessage, BeaconNodeTester.TestEvents["0"].CorrectMhKey)
+			})
+		})
+		Context("When there is a skipped slot", func() {
+			It("Should process the slot properly.", func() {
+				bc := setUpTest(BeaconNodeTester.TestConfig, "3797055")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				BeaconNodeTester.writeEventToHistoricProcess(bc, 3797056, 3797056, 10)
+				BeaconNodeTester.runHistoricalProcess(bc, 2, 1, 0, 0, 0)
+				validateSlot(bc, BeaconNodeTester.TestEvents["3797056"].HeadMessage, 118658, "skipped")
+			})
+		})
+	})
+	Describe("Running the Application to process Known Gaps", Label("unit", "behavioral", "knownGaps"), func() {
+		Context("Phase0 + Altairs: When we need to process a multiple blocks in a multiple entries in the ethcl.known_gaps table.", func() {
+			It("Successfully Process the Blocks", func() {
+				bc := setUpTest(BeaconNodeTester.TestConfig, "99")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				BeaconNodeTester.writeEventToKnownGaps(bc, 100, 101)
+				BeaconNodeTester.runKnownGapsProcess(bc, 2, 2, 0, 0, 0)
+				// Run Two seperate processes
+				BeaconNodeTester.writeEventToKnownGaps(bc, 2375703, 2375703)
+				BeaconNodeTester.runKnownGapsProcess(bc, 2, 3, 0, 0, 0)
 
+				time.Sleep(2 * time.Second)
+				validatePopularBatchBlocks(bc)
+			})
+		})
+		Context("When the start block is greater than the endBlock", Label("now", "now-1"), func() {
+			It("Should Add two entries to the knownGaps table", func() {
+				log.SetLevel(log.DebugLevel)
+				bc := setUpTest(BeaconNodeTester.TestConfig, "104")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				BeaconNodeTester.writeEventToKnownGaps(bc, 101, 100)
+				BeaconNodeTester.runKnownGapsProcess(bc, 2, 2, 0, 2, 0)
+			})
+		})
+		Context("When theres a reprocessing error", Label("now", "now-2"), func() {
+			It("Should update the reprocessing error.", func() {
+				log.SetLevel(log.DebugLevel)
+				bc := setUpTest(BeaconNodeTester.TestConfig, "99")
+				BeaconNodeTester.SetupBeaconNodeMock(BeaconNodeTester.TestEvents, BeaconNodeTester.TestConfig.protocol, BeaconNodeTester.TestConfig.address, BeaconNodeTester.TestConfig.port, BeaconNodeTester.TestConfig.dummyParentRoot)
+				defer httpmock.DeactivateAndReset()
+				// We dont have an entry in the BeaconNodeTester for this slot
+				BeaconNodeTester.writeEventToHistoricProcess(bc, 105, 105, 10)
+				BeaconNodeTester.runHistoricalProcess(bc, 2, 0, 0, 1, 0)
+				BeaconNodeTester.runKnownGapsProcess(bc, 2, 0, 0, 1, 1)
 			})
 		})
 	})
 })
 
-// This function will write an even to the ethcl.historic_process table
+// This function will write an even to the ethcl.known_gaps table
+func (tbc TestBeaconNode) writeEventToKnownGaps(bc *beaconclient.BeaconClient, startSlot, endSlot int) {
+	log.Debug("We are writing the necessary events to batch process")
+	insertKnownGapsStmt := `INSERT INTO ethcl.known_gaps (start_slot, end_slot)
+	VALUES ($1, $2);`
+	res, err := bc.Db.Exec(context.Background(), insertKnownGapsStmt, startSlot, endSlot)
+	Expect(err).ToNot(HaveOccurred())
+	rows, err := res.RowsAffected()
+	if rows != 1 {
+		Fail("We didnt write...")
+	}
+	Expect(err).ToNot(HaveOccurred())
+}
+
+// This function will write an even to the ethcl.known_gaps table
 func (tbc TestBeaconNode) writeEventToHistoricProcess(bc *beaconclient.BeaconClient, startSlot, endSlot, priority int) {
 	log.Debug("We are writing the necessary events to batch process")
 	insertHistoricProcessingStmt := `INSERT INTO ethcl.historic_process (start_slot, end_slot, priority)
 	VALUES ($1, $2, $3);`
 	res, err := bc.Db.Exec(context.Background(), insertHistoricProcessingStmt, startSlot, endSlot, priority)
-	Expect(err)
+	Expect(err).ToNot(HaveOccurred())
 	rows, err := res.RowsAffected()
 	if rows != 1 {
 		Fail("We didnt write...")
 	}
-	Expect(err)
+	Expect(err).ToNot(HaveOccurred())
 }
 
-// Start the batch processing function, and check for the correct inserted slots.
-func (tbc TestBeaconNode) runBatchProcess(bc *beaconclient.BeaconClient, maxWorkers int, startSlot uint64, endSlot uint64, expectedReorgs uint64, expectedKnownGaps uint64) {
-	go bc.CaptureHistoric(maxWorkers)
-	diff := endSlot - startSlot + 1
+// Start the CaptureHistoric function, and check for the correct inserted slots.
+func (tbc TestBeaconNode) runHistoricalProcess(bc *beaconclient.BeaconClient, maxWorkers int, expectedInserts, expectedReorgs, expectedKnownGaps, expectedKnownGapsReprocessError uint64) {
+	ctx, cancel := context.WithCancel(context.Background())
+	go bc.CaptureHistoric(ctx, maxWorkers)
+	validateMetrics(bc, expectedInserts, expectedReorgs, expectedKnownGaps, expectedKnownGapsReprocessError)
+	log.Debug("Calling the stop function for historical processing..")
+	err := bc.StopHistoric(cancel)
+	Expect(err).ToNot(HaveOccurred())
+	time.Sleep(3 * time.Second)
+}
 
+// Wrapper function that processes knownGaps
+func (tbc TestBeaconNode) runKnownGapsProcess(bc *beaconclient.BeaconClient, maxWorkers int, expectedInserts, expectedReorgs, expectedKnownGaps, expectedKnownGapsReprocessError uint64) {
+	ctx, cancel := context.WithCancel(context.Background())
+	go bc.ProcessKnownGaps(ctx, maxWorkers)
+	validateMetrics(bc, expectedInserts, expectedReorgs, expectedKnownGaps, expectedKnownGapsReprocessError)
+	err := bc.StopKnownGapsProcessing(cancel)
+	Expect(err).ToNot(HaveOccurred())
+	time.Sleep(3 * time.Second)
+}
+
+func validateMetrics(bc *beaconclient.BeaconClient, expectedInserts, expectedReorgs, expectedKnownGaps, expectedKnownGapsReprocessError uint64) {
 	curRetry := 0
-	for atomic.LoadUint64(&bc.Metrics.SlotInserts) != diff {
+	value := atomic.LoadUint64(&bc.Metrics.SlotInserts)
+	for value != expectedInserts {
 		time.Sleep(1 * time.Second)
 		curRetry = curRetry + 1
 		if curRetry == maxRetry {
-			Fail(fmt.Sprintf("Too many retries have occurred. The number of inserts expects %d, the number that actually occurred, %d", atomic.LoadUint64(&bc.Metrics.SlotInserts), diff))
+			Fail(fmt.Sprintf("Too many retries have occurred. The number of inserts expected %d, the number that actually occurred, %d", expectedInserts, atomic.LoadUint64(&bc.Metrics.SlotInserts)))
 		}
+		value = atomic.LoadUint64(&bc.Metrics.SlotInserts)
+	}
+	curRetry = 0
+	value = atomic.LoadUint64(&bc.Metrics.KnownGapsInserts)
+	for value != expectedKnownGaps {
+		time.Sleep(1 * time.Second)
+		curRetry = curRetry + 1
+		if curRetry == maxRetry {
+			Fail(fmt.Sprintf("Too many retries have occurred. The number of knownGaps expected %d, the number that actually occurred, %d", expectedKnownGaps, atomic.LoadUint64(&bc.Metrics.KnownGapsInserts)))
+		}
+		value = atomic.LoadUint64(&bc.Metrics.KnownGapsInserts)
+	}
+	curRetry = 0
+	value = atomic.LoadUint64(&bc.Metrics.KnownGapsReprocessError)
+	for value != expectedKnownGapsReprocessError {
+		time.Sleep(1 * time.Second)
+		curRetry = curRetry + 1
+		if curRetry == maxRetry {
+			Fail(fmt.Sprintf("Too many retries have occurred. The number of knownGapsReprocessingErrors expected %d, the number that actually occurred, %d", expectedKnownGapsReprocessError, value))
+		}
+		log.Debug("&bc.Metrics.KnownGapsReprocessError: ", &bc.Metrics.KnownGapsReprocessError)
+		value = atomic.LoadUint64(&bc.Metrics.KnownGapsReprocessError)
+	}
+	curRetry = 0
+	value = atomic.LoadUint64(&bc.Metrics.ReorgInserts)
+	for value != expectedReorgs {
+		time.Sleep(1 * time.Second)
+		curRetry = curRetry + 1
+		if curRetry == maxRetry {
+			Fail(fmt.Sprintf("Too many retries have occurred. The number of Reorgs expected %d, the number that actually occurred, %d", expectedReorgs, atomic.LoadUint64(&bc.Metrics.ReorgInserts)))
+		}
+		value = atomic.LoadUint64(&bc.Metrics.ReorgInserts)
 	}
-
-	Expect(atomic.LoadUint64(&bc.Metrics.KnownGapsInserts)).To(Equal(expectedKnownGaps))
-	Expect(atomic.LoadUint64(&bc.Metrics.ReorgInserts)).To(Equal(expectedKnownGaps))
+}
+
+// A wrapper function to validate a few popular blocks
+func validatePopularBatchBlocks(bc *beaconclient.BeaconClient) {
+	validateSlot(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, 3, "proposed")
+	validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, BeaconNodeTester.TestEvents["100"].CorrectParentRoot, BeaconNodeTester.TestEvents["100"].CorrectEth1BlockHash, BeaconNodeTester.TestEvents["100"].CorrectMhKey)
+	validateBeaconState(bc, BeaconNodeTester.TestEvents["100"].HeadMessage, BeaconNodeTester.TestEvents["100"].CorrectMhKey)
+
+	validateSlot(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, 3, "proposed")
+	validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, BeaconNodeTester.TestEvents["100"].HeadMessage.Block, BeaconNodeTester.TestEvents["101"].CorrectEth1BlockHash, BeaconNodeTester.TestEvents["101"].CorrectMhKey)
+	validateBeaconState(bc, BeaconNodeTester.TestEvents["101"].HeadMessage, BeaconNodeTester.TestEvents["101"].CorrectMhKey)
+
+	validateSlot(bc, BeaconNodeTester.TestEvents["2375703"].HeadMessage, 74240, "proposed")
+	validateSignedBeaconBlock(bc, BeaconNodeTester.TestEvents["2375703"].HeadMessage, BeaconNodeTester.TestEvents["2375703"].CorrectParentRoot, BeaconNodeTester.TestEvents["2375703"].CorrectEth1BlockHash, BeaconNodeTester.TestEvents["2375703"].CorrectMhKey)
+	validateBeaconState(bc, BeaconNodeTester.TestEvents["2375703"].HeadMessage, BeaconNodeTester.TestEvents["2375703"].CorrectMhKey)
 }

pkg/beaconclient/databasewrite.go

@@ -488,23 +488,21 @@ func updateKnownGapErrors(db sql.Database, startSlot int, endSlot int, reprocess
 	res, err := db.Exec(context.Background(), UpsertKnownGapsErrorStmt, startSlot, endSlot, reprocessingErr.Error())
 	if err != nil {
 		loghelper.LogSlotRangeError(strconv.Itoa(startSlot), strconv.Itoa(endSlot), err).Error("Unable to update reprocessing_error")
-		metric.IncrementKnownGapsProcessingError(1)
 		return err
 	}
 	row, err := res.RowsAffected()
 	if err != nil {
 		loghelper.LogSlotRangeError(strconv.Itoa(startSlot), strconv.Itoa(endSlot), err).Error("Unable to count rows affected when trying to update reprocessing_error.")
-		metric.IncrementKnownGapsProcessingError(1)
 		return err
 	}
 	if row != 1 {
 		loghelper.LogSlotRangeError(strconv.Itoa(startSlot), strconv.Itoa(endSlot), err).WithFields(log.Fields{
 			"rowCount": row,
 		}).Error("The rows affected by the upsert for reprocessing_error is not 1.")
-		metric.IncrementKnownGapsProcessingError(1)
+		metric.IncrementKnownGapsReprocessError(1)
 		return err
 	}
-	metric.IncrementKnownGapsProcessed(1)
+	metric.IncrementKnownGapsReprocessError(1)
 	return nil
 }
 

pkg/beaconclient/metrics.go

@@ -19,7 +19,7 @@ import (
 	"sync/atomic"
 
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/sirupsen/logrus"
+	log "github.com/sirupsen/logrus"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
 )
 
@@ -29,8 +29,8 @@ func CreateBeaconClientMetrics() (*BeaconClientMetrics, error) {
 		SlotInserts:             0,
 		ReorgInserts:            0,
 		KnownGapsInserts:        0,
-		knownGapsProcessed:       0,
-		KnownGapsProcessingError: 0,
+		KnownGapsProcessed:      0,
+		KnownGapsReprocessError: 0,
 		HeadError:               0,
 		HeadReorgError:          0,
 	}
@@ -46,11 +46,11 @@ func CreateBeaconClientMetrics() (*BeaconClientMetrics, error) {
 	if err != nil {
 		return nil, err
 	}
-	err = prometheusRegisterHelper("known_gaps_processed", "Keeps track of the number of known gaps we processed.", &metrics.knownGapsProcessed)
+	err = prometheusRegisterHelper("known_gaps_reprocess_error", "Keeps track of the number of known gaps that had errors when reprocessing, but the error was updated successfully.", &metrics.KnownGapsReprocessError)
 	if err != nil {
 		return nil, err
 	}
-	err = prometheusRegisterHelper("known_gaps_processing_error", "Keeps track of the number of known gaps we had errors processing.", &metrics.KnownGapsProcessingError)
+	err = prometheusRegisterHelper("known_gaps_processed", "Keeps track of the number of known gaps we successfully processed.", &metrics.KnownGapsProcessed)
 	if err != nil {
 		return nil, err
 	}
@@ -89,8 +89,8 @@ type BeaconClientMetrics struct {
 	SlotInserts             uint64 // Number of head events we successfully wrote to the DB.
 	ReorgInserts            uint64 // Number of reorg events we successfully wrote to the DB.
 	KnownGapsInserts        uint64 // Number of known_gaps we successfully wrote to the DB.
-	knownGapsProcessed       uint64 // Number of knownGaps processed.
-	KnownGapsProcessingError uint64 // Number of errors that occurred while processing a knownGap
+	KnownGapsProcessed      uint64 // Number of knownGaps processed.
+	KnownGapsReprocessError uint64 // Number of knownGaps that were updated with an error.
 	HeadError               uint64 // Number of errors that occurred when decoding the head message.
 	HeadReorgError          uint64 // Number of errors that occurred when decoding the reorg message.
 }
@@ -98,7 +98,7 @@ type BeaconClientMetrics struct {
 // Wrapper function to increment inserts. If we want to use mutexes later we can easily update all
 // occurrences here.
 func (m *BeaconClientMetrics) IncrementSlotInserts(inc uint64) {
-	logrus.Debug("Incrementing Slot Insert")
+	log.Debug("Incrementing Slot Insert")
 	atomic.AddUint64(&m.SlotInserts, inc)
 }
 
@@ -117,13 +117,7 @@ func (m *BeaconClientMetrics) IncrementKnownGapsInserts(inc uint64) {
 // Wrapper function to increment known gaps processed. If we want to use mutexes later we can easily update all
 // occurrences here.
 func (m *BeaconClientMetrics) IncrementKnownGapsProcessed(inc uint64) {
-	atomic.AddUint64(&m.knownGapsProcessed, inc)
-}
-
-// Wrapper function to increment known gaps processing error. If we want to use mutexes later we can easily update all
-// occurrences here.
-func (m *BeaconClientMetrics) IncrementKnownGapsProcessingError(inc uint64) {
-	atomic.AddUint64(&m.KnownGapsProcessingError, inc)
+	atomic.AddUint64(&m.KnownGapsProcessed, inc)
 }
 
 // Wrapper function to increment head errors. If we want to use mutexes later we can easily update all
@@ -137,3 +131,10 @@ func (m *BeaconClientMetrics) IncrementHeadError(inc uint64) {
 func (m *BeaconClientMetrics) IncrementReorgError(inc uint64) {
 	atomic.AddUint64(&m.HeadReorgError, inc)
 }
+
+// Wrapper function to increment the number of knownGaps that were updated with reprocessing errors.
+//If we want to use mutexes later we can easily update all occurrences here.
+func (m *BeaconClientMetrics) IncrementKnownGapsReprocessError(inc uint64) {
+	log.Debug("Incrementing Known Gap Reprocessing: ", &m.KnownGapsReprocessError)
+	atomic.AddUint64(&m.KnownGapsReprocessError, inc)
+}

pkg/beaconclient/processhistoric.go

@@ -51,35 +51,41 @@ var (
 	WHERE checked_out_by=$1`
 )
 
-type historicProcessing struct {
+type HistoricProcessing struct {
 	db                   sql.Database         //db connection
 	metrics              *BeaconClientMetrics // metrics for beaconclient
 	uniqueNodeIdentifier int                  // node unique identifier.
-	finishProcessing     chan int             // A channel which indicates to the process handleBatchProcess function that its time to end.
 }
 
 // Get a single row of historical slots from the table.
-func (hp historicProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
-	return getBatchProcessRow(hp.db, getHpEntryStmt, checkHpEntryStmt, lockHpEntryStmt, slotCh, strconv.Itoa(hp.uniqueNodeIdentifier))
+func (hp HistoricProcessing) getSlotRange(ctx context.Context, slotCh chan<- slotsToProcess) []error {
+	return getBatchProcessRow(ctx, hp.db, getHpEntryStmt, checkHpEntryStmt, lockHpEntryStmt, slotCh, strconv.Itoa(hp.uniqueNodeIdentifier))
 }
 
 // Remove the table entry.
-func (hp historicProcessing) removeTableEntry(processCh <-chan slotsToProcess) error {
-	return removeRowPostProcess(hp.db, processCh, QueryBySlotStmt, deleteHpEntryStmt)
+func (hp HistoricProcessing) removeTableEntry(ctx context.Context, processCh <-chan slotsToProcess) error {
+	return removeRowPostProcess(ctx, hp.db, processCh, QueryBySlotStmt, deleteHpEntryStmt)
 }
 
 // Remove the table entry.
-func (hp historicProcessing) handleProcessingErrors(errMessages <-chan batchHistoricError) {
+func (hp HistoricProcessing) handleProcessingErrors(ctx context.Context, errMessages <-chan batchHistoricError) {
 	for {
-		errMs := <-errMessages
+		select {
+		case <-ctx.Done():
+			return
+		case errMs := <-errMessages:
 			loghelper.LogSlotError(strconv.Itoa(errMs.slot), errMs.err)
 			writeKnownGaps(hp.db, 1, errMs.slot, errMs.slot, errMs.err, errMs.errProcess, hp.metrics)
 		}
+	}
 }
 
-func (hp historicProcessing) releaseDbLocks() error {
-	go func() { hp.finishProcessing <- 1 }()
+// "un"-checkout the rows held by this DB in the ethcl.historical_process table.
+func (hp HistoricProcessing) releaseDbLocks(cancel context.CancelFunc) error {
+	go func() { cancel() }()
 	log.Debug("Updating all the entries to ethcl.historical processing")
+	log.Debug("Db: ", hp.db)
+	log.Debug("hp.uniqueNodeIdentifier ", hp.uniqueNodeIdentifier)
 	res, err := hp.db.Exec(context.Background(), releaseHpLockStmt, hp.uniqueNodeIdentifier)
 	if err != nil {
 		return fmt.Errorf("Unable to remove lock from ethcl.historical_processing table for node %d, error is %e", hp.uniqueNodeIdentifier, err)
@@ -94,8 +100,12 @@ func (hp historicProcessing) releaseDbLocks() error {
 }
 
 // Process the slot range.
-func processSlotRangeWorker(workCh <-chan int, errCh chan<- batchHistoricError, db sql.Database, serverAddress string, metrics *BeaconClientMetrics, checkDb bool) {
-	for slot := range workCh {
+func processSlotRangeWorker(ctx context.Context, workCh <-chan int, errCh chan<- batchHistoricError, db sql.Database, serverAddress string, metrics *BeaconClientMetrics, checkDb bool) {
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case slot := <-workCh:
 			log.Debug("Handling slot: ", slot)
 			err, errProcess := handleHistoricSlot(db, serverAddress, slot, metrics, checkDb)
 			if err != nil {
@@ -107,19 +117,24 @@ func processSlotRangeWorker(workCh <-chan int, errCh chan<- batchHistoricError,
 				errCh <- errMs
 			}
 		}
+	}
 }
 
 // A wrapper function that insert the start_slot and end_slot from a single row into a channel.
 // It also locks the row by updating the checked_out column.
 // The statement for getting the start_slot and end_slot must be provided.
 // The statement for "locking" the row must also be provided.
-func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRowsStmt string, checkOutRowStmt string, slotCh chan<- slotsToProcess, uniqueNodeIdentifier string) []error {
+func getBatchProcessRow(ctx context.Context, db sql.Database, getStartEndSlotStmt string, checkNewRowsStmt string, checkOutRowStmt string, slotCh chan<- slotsToProcess, uniqueNodeIdentifier string) []error {
 	errCount := make([]error, 0)
 
 	// 5 is an arbitrary number. It allows us to retry a few times before
 	// ending the application.
 	prevErrCount := 0
 	for len(errCount) < 5 {
+		select {
+		case <-ctx.Done():
+			return errCount
+		default:
 			if len(errCount) != prevErrCount {
 				log.WithFields(log.Fields{
 					"errCount": errCount,
@@ -136,20 +151,20 @@ func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRow
 			if row < 1 {
 				time.Sleep(1000 * time.Millisecond)
 				log.Debug("We are checking rows, be patient")
-			continue
+				break
 			}
 			log.Debug("We found a new row")
-		ctx := context.Background()
+			dbCtx := context.Background()
 
 			// Setup TX
-		tx, err := db.Begin(ctx)
+			tx, err := db.Begin(dbCtx)
 			if err != nil {
 				loghelper.LogError(err).Error("We are unable to Begin a SQL transaction")
 				errCount = append(errCount, err)
-			continue
+				break
 			}
 			defer func() {
-			err := tx.Rollback(ctx)
+				err := tx.Rollback(dbCtx)
 				if err != nil && err != pgx.ErrTxClosed {
 					loghelper.LogError(err).Error("We were unable to Rollback a transaction")
 					errCount = append(errCount, err)
@@ -158,52 +173,54 @@ func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRow
 
 			// Query the DB for slots.
 			sp := slotsToProcess{}
-		err = tx.QueryRow(ctx, getStartEndSlotStmt).Scan(&sp.startSlot, &sp.endSlot)
+			err = tx.QueryRow(dbCtx, getStartEndSlotStmt).Scan(&sp.startSlot, &sp.endSlot)
 			if err != nil {
 				if err == pgx.ErrNoRows {
 					time.Sleep(100 * time.Millisecond)
-				continue
+					break
 				}
 				loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), getStartEndSlotStmt, err).Error("Unable to get a row")
 				errCount = append(errCount, err)
-			continue
+				break
 			}
 
 			// Checkout the Row
-		res, err := tx.Exec(ctx, checkOutRowStmt, sp.startSlot, sp.endSlot, uniqueNodeIdentifier)
+			res, err := tx.Exec(dbCtx, checkOutRowStmt, sp.startSlot, sp.endSlot, uniqueNodeIdentifier)
 			if err != nil {
 				loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).Error("Unable to checkout the row")
 				errCount = append(errCount, err)
-			continue
+				break
 			}
 			rows, err := res.RowsAffected()
 			if err != nil {
 				loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, fmt.Errorf("Unable to determine the rows affected when trying to checkout a row."))
 				errCount = append(errCount, err)
-			continue
+				break
 			}
 			if rows > 1 {
 				loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).WithFields(log.Fields{
 					"rowsReturn": rows,
 				}).Error("We locked too many rows.....")
 				errCount = append(errCount, err)
-			continue
+				break
 			}
 			if rows == 0 {
 				loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).WithFields(log.Fields{
 					"rowsReturn": rows,
 				}).Error("We did not lock a single row.")
 				errCount = append(errCount, err)
-			continue
+				break
 			}
-		err = tx.Commit(ctx)
+			err = tx.Commit(dbCtx)
 			if err != nil {
 				loghelper.LogSlotRangeError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), err).Error("Unable commit transactions.")
 				errCount = append(errCount, err)
-			continue
+				break
 			}
+			log.WithField("slots", sp).Debug("Added a new slots to be processed")
 			slotCh <- sp
 		}
+	}
 	log.WithFields(log.Fields{
 		"ErrCount": errCount,
 	}).Error("The ErrCounter")
@@ -211,10 +228,13 @@ func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRow
 }
 
 // After a row has been processed it should be removed from its appropriate table.
-func removeRowPostProcess(db sql.Database, processCh <-chan slotsToProcess, checkProcessedStmt, removeStmt string) error {
+func removeRowPostProcess(ctx context.Context, db sql.Database, processCh <-chan slotsToProcess, checkProcessedStmt, removeStmt string) error {
 	errCh := make(chan error)
 	for {
-		slots := <-processCh
+		select {
+		case <-ctx.Done():
+			return nil
+		case slots := <-processCh:
 			// Make sure the start and end slot exist in the slots table.
 			go func() {
 				finishedProcess := false
@@ -242,4 +262,5 @@ func removeRowPostProcess(db sql.Database, processCh <-chan slotsToProcess, chec
 				return <-errCh
 			}
 		}
+	}
 }

pkg/beaconclient/processknowngaps.go

@@ -54,22 +54,21 @@ type KnownGapsProcessing struct {
 	db                   sql.Database         //db connection
 	metrics              *BeaconClientMetrics // metrics for beaconclient
 	uniqueNodeIdentifier int                  // node unique identifier.
-	finishProcessing     chan int             // A channel which indicates to the process handleBatchProcess function that its time to end.
 }
 
 // This function will perform all the heavy lifting for tracking the head of the chain.
-func (bc *BeaconClient) ProcessKnownGaps(maxWorkers int) []error {
+func (bc *BeaconClient) ProcessKnownGaps(ctx context.Context, maxWorkers int) []error {
 	log.Info("We are starting the known gaps processing service.")
-	bc.KnownGapsProcess = KnownGapsProcessing{db: bc.Db, uniqueNodeIdentifier: bc.UniqueNodeIdentifier, metrics: bc.Metrics, finishProcessing: make(chan int)}
-	errs := handleBatchProcess(maxWorkers, bc.KnownGapsProcess, bc.KnownGapsProcess.finishProcessing, bc.KnownGapsProcess.db, bc.ServerEndpoint, bc.Metrics, bc.CheckDb)
+	bc.KnownGapsProcess = KnownGapsProcessing{db: bc.Db, uniqueNodeIdentifier: bc.UniqueNodeIdentifier, metrics: bc.Metrics}
+	errs := handleBatchProcess(ctx, maxWorkers, bc.KnownGapsProcess, bc.KnownGapsProcess.db, bc.ServerEndpoint, bc.Metrics, bc.CheckDb)
 	log.Debug("Exiting known gaps processing service")
 	return errs
 }
 
 // This function will perform all the necessary clean up tasks for stopping historical processing.
-func (bc *BeaconClient) StopKnownGapsProcessing() error {
-	log.Info("We are stopping the historical processing service.")
-	err := bc.KnownGapsProcess.releaseDbLocks()
+func (bc *BeaconClient) StopKnownGapsProcessing(cancel context.CancelFunc) error {
+	log.Info("We are stopping the known gaps processing service.")
+	err := bc.KnownGapsProcess.releaseDbLocks(cancel)
 	if err != nil {
 		loghelper.LogError(err).WithField("uniqueIdentifier", bc.UniqueNodeIdentifier).Error("We were unable to remove the locks from the ethcl.known_gaps table. Manual Intervention is needed!")
 	}
@@ -77,20 +76,22 @@ func (bc *BeaconClient) StopKnownGapsProcessing() error {
 }
 
 // Get a single row of historical slots from the table.
-func (kgp KnownGapsProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
-	return getBatchProcessRow(kgp.db, getKgEntryStmt, checkKgEntryStmt, lockKgEntryStmt, slotCh, strconv.Itoa(kgp.uniqueNodeIdentifier))
+func (kgp KnownGapsProcessing) getSlotRange(ctx context.Context, slotCh chan<- slotsToProcess) []error {
+	return getBatchProcessRow(ctx, kgp.db, getKgEntryStmt, checkKgEntryStmt, lockKgEntryStmt, slotCh, strconv.Itoa(kgp.uniqueNodeIdentifier))
 }
 
 // Remove the table entry.
-func (kgp KnownGapsProcessing) removeTableEntry(processCh <-chan slotsToProcess) error {
-	return removeRowPostProcess(kgp.db, processCh, QueryBySlotStmt, deleteKgEntryStmt)
+func (kgp KnownGapsProcessing) removeTableEntry(ctx context.Context, processCh <-chan slotsToProcess) error {
+	return removeRowPostProcess(ctx, kgp.db, processCh, QueryBySlotStmt, deleteKgEntryStmt)
 }
 
 // Remove the table entry.
-func (kgp KnownGapsProcessing) handleProcessingErrors(errMessages <-chan batchHistoricError) {
+func (kgp KnownGapsProcessing) handleProcessingErrors(ctx context.Context, errMessages <-chan batchHistoricError) {
 	for {
-		errMs := <-errMessages
-
+		select {
+		case <-ctx.Done():
+			return
+		case errMs := <-errMessages:
 			// Check to see if this if this entry already exists.
 			res, err := kgp.db.Exec(context.Background(), checkKgSingleSlotStmt, errMs.slot, errMs.slot)
 			if err != nil {
@@ -114,11 +115,16 @@ func (kgp KnownGapsProcessing) handleProcessingErrors(errMessages <-chan batchHi
 				writeKnownGaps(kgp.db, 1, errMs.slot, errMs.slot, errMs.err, errMs.errProcess, kgp.metrics)
 			}
 		}
+	}
+
 }
 
 // Updated checked_out column for the uniqueNodeIdentifier.
-func (kgp KnownGapsProcessing) releaseDbLocks() error {
-	go func() { kgp.finishProcessing <- 1 }()
+func (kgp KnownGapsProcessing) releaseDbLocks(cancel context.CancelFunc) error {
+	go func() { cancel() }()
+	log.Debug("Updating all the entries to ethcl.known_gaps")
+	log.Debug("Db: ", kgp.db)
+	log.Debug("kgp.uniqueNodeIdentifier ", kgp.uniqueNodeIdentifier)
 	res, err := kgp.db.Exec(context.Background(), releaseKgLockStmt, kgp.uniqueNodeIdentifier)
 	if err != nil {
 		return err

pkg/beaconclient/processslot.go

@@ -42,9 +42,6 @@ import (
 )
 
 var (
-	SlotUnmarshalError = func(obj string) string {
-		return fmt.Sprintf("Unable to properly unmarshal the Slot field in the %s.", obj)
-	}
 	ParentRootUnmarshalError  = "Unable to properly unmarshal the ParentRoot field in the SignedBeaconBlock."
 	MissingEth1Data           = "Can't get the Eth1 block_hash"
 	VersionedUnmarshalerError = "Unable to create a versioned unmarshaler"
@@ -213,15 +210,8 @@ func (ps *ProcessSlot) getSignedBeaconBlock(serverAddress string, vmCh <-chan *d
 
 	ps.FullSignedBeaconBlock, err = vm.UnmarshalBeaconBlock(ps.SszSignedBeaconBlock)
 	if err != nil {
-		loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error("We are getting an error message when unmarshalling the SignedBeaconBlock.")
-		if ps.FullSignedBeaconBlock.Block().Slot() == 0 {
-			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(SlotUnmarshalError("SignedBeaconBlock"))
-			return fmt.Errorf(SlotUnmarshalError("SignedBeaconBlock"))
-		} else if ps.FullSignedBeaconBlock.Block().ParentRoot() == nil {
-			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(ParentRootUnmarshalError)
-			return fmt.Errorf(ParentRootUnmarshalError)
-		}
-		log.Warn("We received a processing error: ", err)
+		loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Warn("Unable to process the slots SignedBeaconBlock")
+		return nil
 	}
 	ps.ParentBlockRoot = "0x" + hex.EncodeToString(ps.FullSignedBeaconBlock.Block().ParentRoot())
 	return nil
@@ -247,14 +237,8 @@ func (ps *ProcessSlot) getBeaconState(serverEndpoint string, vmCh chan<- *dt.Ver
 	vmCh <- versionedUnmarshaler
 	ps.FullBeaconState, err = versionedUnmarshaler.UnmarshalBeaconState(ps.SszBeaconState)
 	if err != nil {
-		loghelper.LogError(err).Error("We are getting an error message when unmarshalling the BeaconState")
-		if ps.FullBeaconState.Slot() == 0 {
-			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(SlotUnmarshalError("BeaconState"))
-			return fmt.Errorf(SlotUnmarshalError("BeaconState"))
-		} else if hex.EncodeToString(ps.FullBeaconState.Eth1Data().BlockHash) == "" {
-			loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error(MissingEth1Data)
-			return fmt.Errorf(MissingEth1Data)
-		}
+		loghelper.LogSlotError(strconv.Itoa(ps.Slot), err).Error("Unable to process the slots BeaconState")
+		return err
 	}
 	return nil
 }