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[controller.git] / opendaylight / md-sal / sal-akka-raft / src / main / java / org / opendaylight / controller / cluster / raft / SnapshotManager.java

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java
index f1881f5b0f228a62ee4e6e45a03d07c4b0a5e368..4c3fb109add982c9f2d5590d524d20dfbf7ea7b7 100644 (file)
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java
@@ -11,7 +11,6 @@ package org.opendaylight.controller.cluster.raft;
 import akka.japi.Procedure;
 import akka.persistence.SnapshotSelectionCriteria;
 import com.google.common.annotations.VisibleForTesting;
-import com.google.protobuf.ByteString;
 import java.util.List;
 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
 import org.opendaylight.controller.cluster.raft.base.messages.SendInstallSnapshot;
@@ -115,7 +114,7 @@ public class SnapshotManager implements SnapshotState {
 
         @Override
         public boolean isCapturing() {
-            return false;
+            return true;
         }
 
         @Override
@@ -189,6 +188,11 @@ public class SnapshotManager implements SnapshotState {
 
     private class Idle extends AbstractSnapshotState {
 
+        @Override
+        public boolean isCapturing() {
+            return false;
+        }
+
         private boolean capture(ReplicatedLogEntry lastLogEntry, long replicatedToAllIndex, String targetFollower) {
             TermInformationReader lastAppliedTermInfoReader =
                     lastAppliedTermInformationReader.init(context.getReplicatedLog(), context.getLastApplied(),
@@ -207,8 +211,18 @@ public class SnapshotManager implements SnapshotState {
 
             List<ReplicatedLogEntry> unAppliedEntries = context.getReplicatedLog().getFrom(lastAppliedIndex + 1);
 
-            captureSnapshot = new CaptureSnapshot(lastLogEntry.getIndex(),
-                    lastLogEntry.getTerm(), lastAppliedIndex, lastAppliedTerm,
+            long lastLogEntryIndex = lastAppliedIndex;
+            long lastLogEntryTerm = lastAppliedTerm;
+            if(lastLogEntry != null) {
+                lastLogEntryIndex = lastLogEntry.getIndex();
+                lastLogEntryTerm = lastLogEntry.getTerm();
+            } else {
+                LOG.warn("Capturing Snapshot : lastLogEntry is null. Using lastAppliedIndex {} and lastAppliedTerm {} instead.",
+                    lastAppliedIndex, lastAppliedTerm);
+            }
+
+            captureSnapshot = new CaptureSnapshot(lastLogEntryIndex,
+                lastLogEntryTerm, lastAppliedIndex, lastAppliedTerm,
                     newReplicatedToAllIndex, newReplicatedToAllTerm, unAppliedEntries, targetFollower != null);
 
             if(captureSnapshot.isInstallSnapshotInitiated()) {
@@ -271,38 +285,44 @@ public class SnapshotManager implements SnapshotState {
 
     private class Creating extends AbstractSnapshotState {
 
-        @Override
-        public boolean isCapturing() {
-            return true;
-        }
-
         @Override
         public void persist(byte[] snapshotBytes, RaftActorBehavior currentBehavior, long totalMemory) {
             // create a snapshot object from the state provided and save it
             // when snapshot is saved async, SaveSnapshotSuccess is raised.
 
-            Snapshot sn = Snapshot.create(snapshotBytes,
+            Snapshot snapshot = Snapshot.create(snapshotBytes,
                     captureSnapshot.getUnAppliedEntries(),
                     captureSnapshot.getLastIndex(), captureSnapshot.getLastTerm(),
                     captureSnapshot.getLastAppliedIndex(), captureSnapshot.getLastAppliedTerm());
 
-            context.getPersistenceProvider().saveSnapshot(sn);
+            context.getPersistenceProvider().saveSnapshot(snapshot);
 
-            LOG.info("{}: Persisting of snapshot done:{}", persistenceId(), sn.getLogMessage());
+            LOG.info("{}: Persisting of snapshot done: {}", persistenceId(), snapshot.getLogMessage());
 
             long dataThreshold = totalMemory *
                     context.getConfigParams().getSnapshotDataThresholdPercentage() / 100;
-            if (context.getReplicatedLog().dataSize() > dataThreshold) {
+            boolean dataSizeThresholdExceeded = context.getReplicatedLog().dataSize() > dataThreshold;
 
+            boolean logSizeExceededSnapshotBatchCount =
+                    context.getReplicatedLog().size() >= context.getConfigParams().getSnapshotBatchCount();
+LOG.debug("Log size: {}, getSnapshotBatchCount: {}",context.getReplicatedLog().size(),context.getConfigParams().getSnapshotBatchCount());
+            if (dataSizeThresholdExceeded || logSizeExceededSnapshotBatchCount) {
                 if(LOG.isDebugEnabled()) {
-                    LOG.debug("{}: dataSize {} exceeds dataThreshold {} - doing snapshotPreCommit with index {}",
-                            persistenceId(), context.getReplicatedLog().dataSize(), dataThreshold,
-                            captureSnapshot.getLastAppliedIndex());
+                    if(dataSizeThresholdExceeded) {
+                        LOG.debug("{}: log data size {} exceeds the memory threshold {} - doing snapshotPreCommit with index {}",
+                                context.getId(), context.getReplicatedLog().dataSize(), dataThreshold,
+                                captureSnapshot.getLastAppliedIndex());
+                    } else {
+                        LOG.debug("{}: log size {} exceeds the snapshot batch count {} - doing snapshotPreCommit with index {}",
+                                context.getId(), context.getReplicatedLog().size(),
+                                context.getConfigParams().getSnapshotBatchCount(), captureSnapshot.getLastAppliedIndex());
+                    }
                 }
 
-                // if memory is less, clear the log based on lastApplied.
-                // this could/should only happen if one of the followers is down
-                // as normally we keep removing from the log when its replicated to all.
+                // We either exceeded the memory threshold or the log size exceeded the snapshot batch
+                // count so, to keep the log memory footprint in check, clear the log based on lastApplied.
+                // This could/should only happen if one of the followers is down as normally we keep
+                // removing from the log as entries are replicated to all.
                 context.getReplicatedLog().snapshotPreCommit(captureSnapshot.getLastAppliedIndex(),
                         captureSnapshot.getLastAppliedTerm());
 
@@ -327,15 +347,14 @@ public class SnapshotManager implements SnapshotState {
                         context.getReplicatedLog().getSnapshotTerm());
             }
 
-            LOG.info("{}: Removed in-memory snapshotted entries, adjusted snaphsotIndex:{} " +
-                            "and term:{}", persistenceId(), captureSnapshot.getLastAppliedIndex(),
-                    captureSnapshot.getLastAppliedTerm());
+            LOG.info("{}: Removed in-memory snapshotted entries, adjusted snaphsotIndex: {} " +
+                    "and term: {}", context.getId(), context.getReplicatedLog().getSnapshotIndex(),
+                    context.getReplicatedLog().getSnapshotTerm());
 
             if (context.getId().equals(currentBehavior.getLeaderId())
                     && captureSnapshot.isInstallSnapshotInitiated()) {
                 // this would be call straight to the leader and won't initiate in serialization
-                currentBehavior.handleMessage(context.getActor(), new SendInstallSnapshot(
-                        ByteString.copyFrom(snapshotBytes)));
+                currentBehavior.handleMessage(context.getActor(), new SendInstallSnapshot(snapshot));
             }
 
             captureSnapshot = null;