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Avoiding ShardSync Task sleep when we skip the shard sync due to no shards found

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This commit is contained in:
Ashwin Giridharan 2020-07-22 10:36:22 -07:00
parent ff703459e1
commit 8aec062e64
2 changed files with 8 additions and 6 deletions
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10
amazon-kinesis-client/src/main/java/software/amazon/kinesis/leases/HierarchicalShardSyncer.java
View file

@ -97,6 +97,7 @@ public class HierarchicalShardSyncer {
/**
* Check and create leases for any new shards (e.g. following a reshard operation). Sync leases with Kinesis shards
* (e.g. at startup, or when we reach end of a shard).
* Return true, if shard sync was performed. Return false, if shard sync is skipped.
*
* @param shardDetector
* @param leaseRefresher
@ -109,18 +110,18 @@ public class HierarchicalShardSyncer {
* @throws KinesisClientLibIOException
*/
// CHECKSTYLE:OFF CyclomaticComplexity
public synchronized void checkAndCreateLeaseForNewShards(@NonNull final ShardDetector shardDetector,
public synchronized boolean checkAndCreateLeaseForNewShards(@NonNull final ShardDetector shardDetector,
final LeaseRefresher leaseRefresher, final InitialPositionInStreamExtended initialPosition,
final MetricsScope scope, final boolean ignoreUnexpectedChildShards, final boolean isLeaseTableEmpty)
throws DependencyException, InvalidStateException, ProvisionedThroughputException, KinesisClientLibIOException, InterruptedException {
final List<Shard> latestShards = isLeaseTableEmpty ?
getShardListAtInitialPosition(shardDetector, initialPosition) : getShardList(shardDetector);
checkAndCreateLeaseForNewShards(shardDetector, leaseRefresher, initialPosition, latestShards, ignoreUnexpectedChildShards, scope,
return checkAndCreateLeaseForNewShards(shardDetector, leaseRefresher, initialPosition, latestShards, ignoreUnexpectedChildShards, scope,
isLeaseTableEmpty);
}
//Provide a pre-collcted list of shards to avoid calling ListShards API
public synchronized void checkAndCreateLeaseForNewShards(@NonNull final ShardDetector shardDetector,
public synchronized boolean checkAndCreateLeaseForNewShards(@NonNull final ShardDetector shardDetector,
final LeaseRefresher leaseRefresher, final InitialPositionInStreamExtended initialPosition,
List<Shard> latestShards, final boolean ignoreUnexpectedChildShards, final MetricsScope scope, final boolean isLeaseTableEmpty)
throws DependencyException, InvalidStateException, ProvisionedThroughputException, KinesisClientLibIOException {
@ -131,7 +132,7 @@ public class HierarchicalShardSyncer {
log.debug("{} - Num shards: {}", streamIdentifier, latestShards.size());
} else {
log.warn("Skipping shard sync for {} as no shards found from service.", streamIdentifier);
return;
return false;
}
final Map<String, Shard> shardIdToShardMap = constructShardIdToShardMap(latestShards);
@ -161,6 +162,7 @@ public class HierarchicalShardSyncer {
}
final List<Lease> trackedLeases = new ArrayList<>(currentLeases);
trackedLeases.addAll(newLeasesToCreate);
return true;
}
/** Helper method to detect a race condition between fetching the shards via paginated DescribeStream calls

4
amazon-kinesis-client/src/main/java/software/amazon/kinesis/leases/ShardSyncTask.java
View file

@ -67,11 +67,11 @@ public class ShardSyncTask implements ConsumerTask {
boolean shardSyncSuccess = true;
try {
hierarchicalShardSyncer.checkAndCreateLeaseForNewShards(shardDetector, leaseRefresher,
boolean didPerformShardSync = hierarchicalShardSyncer.checkAndCreateLeaseForNewShards(shardDetector, leaseRefresher,
initialPosition, scope, ignoreUnexpectedChildShards,
leaseRefresher.isLeaseTableEmpty());
if (shardSyncTaskIdleTimeMillis > 0) {
if (didPerformShardSync && shardSyncTaskIdleTimeMillis > 0) {
Thread.sleep(shardSyncTaskIdleTimeMillis);
}
} catch (Exception e) {