abdullah alamoudi has uploaded a new change for review.
https://asterix-gerrit.ics.uci.edu/2632
Change subject: WIP: Add last component id to index checkpoint files
......................................................................
WIP: Add last component id to index checkpoint files
Change-Id: If24c9baaac2b79e7d1acf47fa2601767388ce988
---
M
asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/IndexCheckpointManager.java
M
asterixdb/asterix-common/src/main/java/org/apache/asterix/common/ioopcallbacks/LSMIOOperationCallback.java
M
asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IIndexCheckpointManager.java
M
asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IndexCheckpoint.java
M
asterixdb/asterix-common/src/test/java/org/apache/asterix/test/ioopcallbacks/LSMIOOperationCallbackTest.java
M
asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/MarkComponentValidTask.java
M
asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/sync/IndexSynchronizer.java
M
hyracks-fullstack/hyracks/hyracks-storage-am-lsm-btree/src/main/java/org/apache/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
M
hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/LSMHarness.java
9 files changed, 78 insertions(+), 28 deletions(-)
git pull ssh://asterix-gerrit.ics.uci.edu:29418/asterixdb
refs/changes/32/2632/1
diff --git
a/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/IndexCheckpointManager.java
b/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/IndexCheckpointManager.java
index a012f1e..fbea0d0 100644
---
a/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/IndexCheckpointManager.java
+++
b/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/IndexCheckpointManager.java
@@ -65,18 +65,20 @@
}
@Override
- public synchronized void replicated(String componentTimestamp, long
masterLsn) throws HyracksDataException {
+ public synchronized void replicated(String componentTimestamp, long
masterLsn, long componentId)
+ throws HyracksDataException {
final Long localLsn =
getLatest().getMasterNodeFlushMap().get(masterLsn);
if (localLsn == null) {
throw new IllegalStateException("Component flushed before lsn
mapping was received");
}
- flushed(componentTimestamp, localLsn);
+ flushed(componentTimestamp, localLsn, componentId);
}
@Override
- public synchronized void flushed(String componentTimestamp, long lsn)
throws HyracksDataException {
+ public synchronized void flushed(String componentTimestamp, long lsn, long
componentId)
+ throws HyracksDataException {
final IndexCheckpoint latest = getLatest();
- IndexCheckpoint nextCheckpoint = IndexCheckpoint.next(latest, lsn,
componentTimestamp);
+ IndexCheckpoint nextCheckpoint = IndexCheckpoint.next(latest, lsn,
componentTimestamp, componentId);
persist(nextCheckpoint);
deleteHistory(nextCheckpoint.getId(), HISTORY_CHECKPOINTS);
}
@@ -85,8 +87,8 @@
public synchronized void masterFlush(long masterLsn, long localLsn) throws
HyracksDataException {
final IndexCheckpoint latest = getLatest();
latest.getMasterNodeFlushMap().put(masterLsn, localLsn);
- final IndexCheckpoint next =
- IndexCheckpoint.next(latest, latest.getLowWatermark(),
latest.getValidComponentTimestamp());
+ final IndexCheckpoint next = IndexCheckpoint.next(latest,
latest.getLowWatermark(),
+ latest.getValidComponentTimestamp(),
latest.getLastComponentId());
persist(next);
notifyAll();
}
diff --git
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/ioopcallbacks/LSMIOOperationCallback.java
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/ioopcallbacks/LSMIOOperationCallback.java
index 50f5906..2674c4c 100644
---
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/ioopcallbacks/LSMIOOperationCallback.java
+++
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/ioopcallbacks/LSMIOOperationCallback.java
@@ -23,7 +23,6 @@
import java.util.Deque;
import java.util.List;
import java.util.Map;
-import java.util.Optional;
import org.apache.asterix.common.context.DatasetInfo;
import org.apache.asterix.common.storage.IIndexCheckpointManagerProvider;
@@ -45,6 +44,8 @@
import
org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
import org.apache.hyracks.storage.am.lsm.common.impls.DiskComponentMetadata;
import org.apache.hyracks.storage.am.lsm.common.impls.FlushOperation;
+import
org.apache.hyracks.storage.am.lsm.common.impls.LSMComponentFileReferences;
+import org.apache.hyracks.storage.am.lsm.common.impls.LSMComponentId;
import org.apache.hyracks.storage.am.lsm.common.util.ComponentUtils;
import org.apache.hyracks.storage.am.lsm.common.util.LSMComponentIdUtils;
@@ -52,6 +53,7 @@
public class LSMIOOperationCallback implements ILSMIOOperationCallback {
public static final String KEY_FLUSH_LOG_LSN = "FlushLogLsn";
public static final String KEY_NEXT_COMPONENT_ID = "NextComponentId";
+ public static final String KEY_FLUSHED_COMPONENT_ID = "FlushedComponentId";
private static final String KEY_FIRST_LSN = "FirstLsn";
private static final MutableArrayValueReference KEY_METADATA_FLUSH_LOG_LSN
=
new MutableArrayValueReference(KEY_FLUSH_LOG_LSN.getBytes());
@@ -105,15 +107,16 @@
return;
}
if (operation.getIOOpertionType() == LSMIOOperationType.FLUSH) {
+ // will always update the checkpoint file even if no new component
was created
+ FlushOperation flush = (FlushOperation) operation;
+ LSMComponentFileReferences files = flush.getComponentFiles();
Map<String, Object> map =
operation.getAccessor().getOpContext().getParameters();
final Long lsn = (Long) map.get(KEY_FLUSH_LOG_LSN);
- final Optional<String> componentFile =
-
operation.getNewComponent().getLSMComponentPhysicalFiles().stream().findAny();
- if (componentFile.isPresent()) {
- final ResourceReference ref =
ResourceReference.of(componentFile.get());
- final String componentEndTime =
AbstractLSMIndexFileManager.getComponentEndTime(ref.getName());
-
indexCheckpointManagerProvider.get(ref).flushed(componentEndTime, lsn);
- }
+ final LSMComponentId id = (LSMComponentId)
map.get(KEY_FLUSHED_COMPONENT_ID);
+ String componentFile =
files.getInsertIndexFileReference().getAbsolutePath();
+ final ResourceReference ref = ResourceReference.of(componentFile);
+ final String componentEndTime =
AbstractLSMIndexFileManager.getComponentEndTime(ref.getName());
+ indexCheckpointManagerProvider.get(ref).flushed(componentEndTime,
lsn, id.getMinId());
}
}
@@ -195,9 +198,11 @@
dsInfo.declareActiveIOOperation();
if (operation.getIOOpertionType() == LSMIOOperationType.FLUSH) {
pendingFlushes++;
+ FlushOperation flush = (FlushOperation) operation;
Map<String, Object> map =
operation.getAccessor().getOpContext().getParameters();
Long flushLsn = (Long) map.get(KEY_FLUSH_LOG_LSN);
map.put(KEY_FIRST_LSN, firstLsnForCurrentMemoryComponent);
+ map.put(KEY_FLUSHED_COMPONENT_ID,
flush.getFlushingComponent().getId());
componentIds.add((ILSMComponentId) map.get(KEY_NEXT_COMPONENT_ID));
firstLsnForCurrentMemoryComponent = flushLsn; // Advance the first
lsn for new component
}
diff --git
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IIndexCheckpointManager.java
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IIndexCheckpointManager.java
index b008f11..a172a0a 100644
---
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IIndexCheckpointManager.java
+++
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IIndexCheckpointManager.java
@@ -33,25 +33,26 @@
void init(long lsn) throws HyracksDataException;
/**
- * Called when a new LSM disk component is flushed. When called, the
index checkpoiint is updated
+ * Called when a new LSM disk component is flushed. When called, the index
checkpoint is updated
* with the latest valid {@code componentTimestamp} and low watermark
{@code lsn}
*
* @param componentTimestamp
* @param lsn
* @throws HyracksDataException
*/
- void flushed(String componentTimestamp, long lsn) throws
HyracksDataException;
+ void flushed(String componentTimestamp, long lsn, long componentId) throws
HyracksDataException;
/**
- * Called when a new LSM disk component is replicated from master. When
called, the index checkpoiint is updated
+ * Called when a new LSM disk component is replicated from master. When
called, the index checkpoint is updated
* with the latest valid {@code componentTimestamp} and the local lsn
mapping of {@code masterLsn} is set as the
* new low watermark.
*
* @param componentTimestamp
* @param masterLsn
+ * @param componentId
* @throws HyracksDataException
*/
- void replicated(String componentTimestamp, long masterLsn) throws
HyracksDataException;
+ void replicated(String componentTimestamp, long masterLsn, long
componentId) throws HyracksDataException;
/**
* Called when a flush log is received and replicated from master. The
mapping between
diff --git
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IndexCheckpoint.java
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IndexCheckpoint.java
index 6e845e1..c12da9b 100644
---
a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IndexCheckpoint.java
+++
b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/storage/IndexCheckpoint.java
@@ -32,9 +32,11 @@
private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
private static final long INITIAL_CHECKPOINT_ID = 0;
+ private static final long EMPTY_INDEX_LAST_COMPONENT_ID = -1L;
private long id;
private String validComponentTimestamp;
private long lowWatermark;
+ private long lastComponentId;
private Map<Long, Long> masterNodeFlushMap;
public static IndexCheckpoint first(long lowWatermark) {
@@ -42,17 +44,20 @@
firstCheckpoint.id = INITIAL_CHECKPOINT_ID;
firstCheckpoint.lowWatermark = lowWatermark;
firstCheckpoint.validComponentTimestamp = null;
+ firstCheckpoint.lastComponentId = EMPTY_INDEX_LAST_COMPONENT_ID;
firstCheckpoint.masterNodeFlushMap = new HashMap<>();
return firstCheckpoint;
}
- public static IndexCheckpoint next(IndexCheckpoint latest, long
lowWatermark, String validComponentTimestamp) {
+ public static IndexCheckpoint next(IndexCheckpoint latest, long
lowWatermark, String validComponentTimestamp,
+ long lastComponentId) {
if (lowWatermark < latest.getLowWatermark()) {
throw new IllegalStateException("Low watermark should always be
increasing");
}
IndexCheckpoint next = new IndexCheckpoint();
next.id = latest.getId() + 1;
next.lowWatermark = lowWatermark;
+ next.lastComponentId = lastComponentId;
next.validComponentTimestamp = validComponentTimestamp;
next.masterNodeFlushMap = latest.getMasterNodeFlushMap();
// remove any lsn from the map that wont be used anymore
@@ -72,6 +77,10 @@
return lowWatermark;
}
+ public long getLastComponentId() {
+ return lastComponentId;
+ }
+
public Map<Long, Long> getMasterNodeFlushMap() {
return masterNodeFlushMap;
}
diff --git
a/asterixdb/asterix-common/src/test/java/org/apache/asterix/test/ioopcallbacks/LSMIOOperationCallbackTest.java
b/asterixdb/asterix-common/src/test/java/org/apache/asterix/test/ioopcallbacks/LSMIOOperationCallbackTest.java
index 7af7b6e..29a2aa0 100644
---
a/asterixdb/asterix-common/src/test/java/org/apache/asterix/test/ioopcallbacks/LSMIOOperationCallbackTest.java
+++
b/asterixdb/asterix-common/src/test/java/org/apache/asterix/test/ioopcallbacks/LSMIOOperationCallbackTest.java
@@ -19,6 +19,9 @@
package org.apache.asterix.test.ioopcallbacks;
+import java.text.Format;
+import java.text.SimpleDateFormat;
+import java.util.Date;
import java.util.HashMap;
import java.util.Map;
@@ -35,6 +38,7 @@
import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndex;
import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor;
import org.apache.hyracks.storage.am.lsm.common.api.ILSMMemoryComponent;
+import
org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMIndexFileManager;
import
org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMMemoryComponent;
import org.apache.hyracks.storage.am.lsm.common.impls.DiskComponentMetadata;
import org.apache.hyracks.storage.am.lsm.common.impls.FlushOperation;
@@ -60,6 +64,15 @@
* 7. destroy
*/
+ private static final Format FORMATTER =
+ new
SimpleDateFormat(AbstractLSMIndexFileManager.COMPONENT_TIMESTAMP_FORMAT);
+
+ private static String getComponentFileName() {
+ Date date = new Date();
+ String ts = FORMATTER.format(date);
+ return ts + '_' + ts;
+ }
+
@Test
public void testNormalSequence() throws HyracksDataException {
int numMemoryComponents = 2;
@@ -81,7 +94,7 @@
flushMap.put(LSMIOOperationCallback.KEY_NEXT_COMPONENT_ID,
nextComponentId);
ILSMIndexAccessor firstAccessor = new TestLSMIndexAccessor(new
TestLSMIndexOperationContext(mockIndex));
firstAccessor.getOpContext().setParameters(flushMap);
- FileReference firstTarget = new
FileReference(Mockito.mock(IODeviceHandle.class), "path");
+ FileReference firstTarget = new
FileReference(Mockito.mock(IODeviceHandle.class), getComponentFileName());
LSMComponentFileReferences firstFiles = new
LSMComponentFileReferences(firstTarget, firstTarget, firstTarget);
FlushOperation firstFlush = new TestFlushOperation(firstAccessor,
firstTarget, callback, indexId, firstFiles,
new LSMComponentId(0, 0));
@@ -97,7 +110,7 @@
flushMap.put(LSMIOOperationCallback.KEY_NEXT_COMPONENT_ID,
nextComponentId);
ILSMIndexAccessor secondAccessor = new TestLSMIndexAccessor(new
TestLSMIndexOperationContext(mockIndex));
secondAccessor.getOpContext().setParameters(flushMap);
- FileReference secondTarget = new
FileReference(Mockito.mock(IODeviceHandle.class), "path");
+ FileReference secondTarget = new
FileReference(Mockito.mock(IODeviceHandle.class), getComponentFileName());
LSMComponentFileReferences secondFiles =
new LSMComponentFileReferences(secondTarget, secondTarget,
secondTarget);
FlushOperation secondFlush = new TestFlushOperation(secondAccessor,
secondTarget, callback, indexId,
@@ -175,7 +188,7 @@
flushMap.put(LSMIOOperationCallback.KEY_NEXT_COMPONENT_ID,
expectedId);
ILSMIndexAccessor accessor = new TestLSMIndexAccessor(new
TestLSMIndexOperationContext(mockIndex));
accessor.getOpContext().setParameters(flushMap);
- FileReference target = new
FileReference(Mockito.mock(IODeviceHandle.class), "path");
+ FileReference target = new
FileReference(Mockito.mock(IODeviceHandle.class), getComponentFileName());
LSMComponentFileReferences files = new
LSMComponentFileReferences(target, target, target);
FlushOperation flush =
new TestFlushOperation(accessor, target, callback,
indexId, files, new LSMComponentId(0, 0));
@@ -210,7 +223,7 @@
IIndexCheckpointManagerProvider indexCheckpointManagerProvider =
Mockito.mock(IIndexCheckpointManagerProvider.class);
IIndexCheckpointManager indexCheckpointManager =
Mockito.mock(IIndexCheckpointManager.class);
-
Mockito.doNothing().when(indexCheckpointManager).flushed(Mockito.any(),
Mockito.anyLong());
+
Mockito.doNothing().when(indexCheckpointManager).flushed(Mockito.any(),
Mockito.anyLong(), Mockito.anyLong());
Mockito.doReturn(indexCheckpointManager).when(indexCheckpointManagerProvider).get(Mockito.any());
return indexCheckpointManagerProvider;
}
diff --git
a/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/MarkComponentValidTask.java
b/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/MarkComponentValidTask.java
index 57474ef..7102988 100644
---
a/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/MarkComponentValidTask.java
+++
b/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/MarkComponentValidTask.java
@@ -43,10 +43,12 @@
public class MarkComponentValidTask implements IReplicaTask {
private final long masterLsn;
+ private final long lastComponentId;
private final String file;
- public MarkComponentValidTask(String file, long masterLsn) {
+ public MarkComponentValidTask(String file, long masterLsn, long
lastComponentId) {
this.file = file;
+ this.lastComponentId = lastComponentId;
this.masterLsn = masterLsn;
}
@@ -82,7 +84,7 @@
replicationTimeOut -=
TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTime);
}
final String componentEndTime =
AbstractLSMIndexFileManager.getComponentEndTime(indexRef.getName());
- indexCheckpointManager.replicated(componentEndTime, masterLsn);
+ indexCheckpointManager.replicated(componentEndTime, masterLsn,
lastComponentId);
}
}
@@ -97,6 +99,7 @@
final DataOutputStream dos = new DataOutputStream(out);
dos.writeUTF(file);
dos.writeLong(masterLsn);
+ dos.writeLong(lastComponentId);
} catch (IOException e) {
throw HyracksDataException.create(e);
}
@@ -105,6 +108,7 @@
public static MarkComponentValidTask create(DataInput input) throws
IOException {
final String indexFile = input.readUTF();
final long lsn = input.readLong();
- return new MarkComponentValidTask(indexFile, lsn);
+ final long lastComponentId = input.readLong();
+ return new MarkComponentValidTask(indexFile, lsn, lastComponentId);
}
}
\ No newline at end of file
diff --git
a/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/sync/IndexSynchronizer.java
b/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/sync/IndexSynchronizer.java
index 0e07ac7..502aeee 100644
---
a/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/sync/IndexSynchronizer.java
+++
b/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/sync/IndexSynchronizer.java
@@ -37,6 +37,7 @@
import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexOperationContext;
import org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexReplicationJob;
import org.apache.hyracks.storage.am.lsm.common.api.LSMOperationType;
+import org.apache.hyracks.storage.am.lsm.common.impls.LSMComponentId;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
@@ -91,7 +92,8 @@
final FileSynchronizer fileSynchronizer = new FileSynchronizer(appCtx,
replica);
job.getJobFiles().stream().map(StoragePathUtil::getFileRelativePath).forEach(fileSynchronizer::replicate);
// send mark component valid
- MarkComponentValidTask markValidTask = new
MarkComponentValidTask(indexFile, getReplicatedComponentLsn());
+ MarkComponentValidTask markValidTask =
+ new MarkComponentValidTask(indexFile,
getReplicatedComponentLsn(), getReplicatedComponentId());
ReplicationProtocol.sendTo(replica, markValidTask);
ReplicationProtocol.waitForAck(replica);
LOGGER.debug("Replicated component ({}) to replica {}", indexFile,
replica);
@@ -126,4 +128,14 @@
return ((LSMIOOperationCallback) lsmIndex.getIOOperationCallback())
.getComponentLSN(ctx.getComponentsToBeReplicated());
}
+
+ private long getReplicatedComponentId() throws HyracksDataException {
+ final ILSMIndexReplicationJob indexReplJob = (ILSMIndexReplicationJob)
job;
+ if (indexReplJob.getLSMOpType() != LSMOperationType.FLUSH) {
+ return -1L;
+ }
+ final ILSMIndexOperationContext ctx =
indexReplJob.getLSMIndexOperationContext();
+ LSMComponentId id = (LSMComponentId)
ctx.getComponentsToBeReplicated().get(0).getId();
+ return id.getMinId();
+ }
}
\ No newline at end of file
diff --git
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-btree/src/main/java/org/apache/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-btree/src/main/java/org/apache/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
index 7acc59f..2ad4fee 100644
---
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-btree/src/main/java/org/apache/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
+++
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-btree/src/main/java/org/apache/hyracks/storage/am/lsm/btree/impls/LSMBTreeFlushOperation.java
@@ -26,11 +26,13 @@
public class LSMBTreeFlushOperation extends FlushOperation {
private final FileReference bloomFilterFlushTarget;
+ private final LSMComponentFileReferences fileReferences;
public LSMBTreeFlushOperation(ILSMIndexAccessor accessor, FileReference
flushTarget,
FileReference bloomFilterFlushTarget, ILSMIOOperationCallback
callback, String indexIdentifier) {
super(accessor, flushTarget, callback, indexIdentifier);
this.bloomFilterFlushTarget = bloomFilterFlushTarget;
+ fileReferences = new LSMComponentFileReferences(target, null,
bloomFilterFlushTarget);
}
public FileReference getBloomFilterTarget() {
@@ -39,6 +41,6 @@
@Override
public LSMComponentFileReferences getComponentFiles() {
- return new LSMComponentFileReferences(target, null,
bloomFilterFlushTarget);
+ return fileReferences;
}
}
diff --git
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/LSMHarness.java
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/LSMHarness.java
index 2a3e983..ece7688 100644
---
a/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/LSMHarness.java
+++
b/hyracks-fullstack/hyracks/hyracks-storage-am-lsm-common/src/main/java/org/apache/hyracks/storage/am/lsm/common/impls/LSMHarness.java
@@ -271,6 +271,8 @@
// newComponent is null if the flush op. was not performed.
if (!failedOperation && newComponent != null) {
lsmIndex.addDiskComponent(newComponent);
+ // TODO: The following should also replicate component Id
+ // even if empty component
if (replicationEnabled && newComponent !=
EmptyComponent.INSTANCE) {
componentsToBeReplicated.clear();
componentsToBeReplicated.add(newComponent);
--
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Gerrit-MessageType: newchange
Gerrit-Change-Id: If24c9baaac2b79e7d1acf47fa2601767388ce988
Gerrit-PatchSet: 1
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: abdullah alamoudi <bamou...@gmail.com>
