Bei Zhang created BEAM-3487:
-------------------------------
Summary: GroupByKey stalls with GroupingShuffleReader split
refusals
Key: BEAM-3487
URL: https://issues.apache.org/jira/browse/BEAM-3487
Project: Beam
Issue Type: Bug
Components: runner-dataflow
Affects Versions: 2.2.0
Reporter: Bei Zhang
Assignee: Thomas Groh
With info messages with something like:
{quote}{{Refused to split GroupingShuffleReader <unstarted in shuffle range
[ShufflePosition(base64:AAAAA1CWNvgAAQ),
ShufflePosition(base64:AAAAA4sOz1AAAQ))> at
ShufflePosition(base64:AAAAA1CWNvkAAQ)}}
{quote}
The lull messages look like this:
{quote}{{Processing lull for PT300.006S in state read-shuffle of Write
Vectors2/GroupIntoShards/Read at
com.google.cloud.dataflow.worker.ApplianceShuffleReader.readIncludingPosition(Native
Method) at
com.google.cloud.dataflow.worker.ChunkingShuffleBatchReader.read(ChunkingShuffleBatchReader.java:62)
at
com.google.cloud.dataflow.worker.util.common.worker.CachingShuffleBatchReader$1.load(CachingShuffleBatchReader.java:57)
at
com.google.cloud.dataflow.worker.util.common.worker.CachingShuffleBatchReader$1.load(CachingShuffleBatchReader.java:53)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3628)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2336)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2295)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2208)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache.get(LocalCache.java:4053)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4057)
at
com.google.cloud.dataflow.worker.repackaged.com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4986)
at
com.google.cloud.dataflow.worker.util.common.worker.CachingShuffleBatchReader.read(CachingShuffleBatchReader.java:76)
at
com.google.cloud.dataflow.worker.util.common.worker.BatchingShuffleEntryReader$ShuffleReadIterator.fillEntries(BatchingShuffleEntryReader.java:133)
at
com.google.cloud.dataflow.worker.util.common.worker.BatchingShuffleEntryReader$ShuffleReadIterator.fillEntriesIfNeeded(BatchingShuffleEntryReader.java:126)
at
com.google.cloud.dataflow.worker.util.common.worker.BatchingShuffleEntryReader$ShuffleReadIterator.hasNext(BatchingShuffleEntryReader.java:90)
at
com.google.cloud.dataflow.worker.util.common.ForwardingReiterator.hasNext(ForwardingReiterator.java:62)
at
com.google.cloud.dataflow.worker.util.common.worker.GroupingShuffleEntryIterator.advance(GroupingShuffleEntryIterator.java:118)
at
com.google.cloud.dataflow.worker.GroupingShuffleReader$GroupingShuffleReaderIterator.advance(GroupingShuffleReader.java:230)
at
com.google.cloud.dataflow.worker.GroupingShuffleReader$GroupingShuffleReaderIterator.start(GroupingShuffleReader.java:224)
at
com.google.cloud.dataflow.worker.util.common.worker.ReadOperation$SynchronizedReaderIterator.start(ReadOperation.java:347)
at
com.google.cloud.dataflow.worker.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:183)
at
com.google.cloud.dataflow.worker.util.common.worker.ReadOperation.start(ReadOperation.java:148)
at
com.google.cloud.dataflow.worker.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:68)
at
com.google.cloud.dataflow.worker.DataflowWorker.executeWork(DataflowWorker.java:330)
at
com.google.cloud.dataflow.worker.DataflowWorker.doWork(DataflowWorker.java:302)
at
com.google.cloud.dataflow.worker.DataflowWorker.getAndPerformWork(DataflowWorker.java:251)
at
com.google.cloud.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.doWork(DataflowBatchWorkerHarness.java:135)
at
com.google.cloud.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.call(DataflowBatchWorkerHarness.java:115)
at
com.google.cloud.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.call(DataflowBatchWorkerHarness.java:102)
at java.util.concurrent.FutureTask.run(FutureTask.java:266) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)}}
{quote}
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