Sagar Sumit created HUDI-5028:
---------------------------------
Summary: Handle conficting writes for multi-writers with OCC
enabled
Key: HUDI-5028
URL: https://issues.apache.org/jira/browse/HUDI-5028
Project: Apache Hudi
Issue Type: Task
Components: deltastreamer, writer-core
Reporter: Sagar Sumit
Even if OCC is enabled and lock provider configs are set, we see that once in a
while one of the writers will abort (even with retries) because another writer
has acquired a lock for a long-running transaction. We see below message and
stacktrace:
{code:java}
Found conflicting writes between first operation = {actionType=deltacommit,
instantTime=20221004012622654, actionState=INFLIGHT'}, second operation =
{actionType=deltacommit, instantTime=20221004012430279, actionState=COMPLETED'}
, intersecting file ids [f5aacff1-8f27-48af-89e9-8618a3cbe700-0]{code}
{code:java}
java.util.concurrent.ExecutionException:
org.apache.hudi.exception.HoodieException:
java.util.ConcurrentModificationException: Cannot resolve conflicts for
overlapping writes at
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908) at
org.apache.hudi.async.HoodieAsyncService.waitForShutdown(HoodieAsyncService.java:103)
at
org.apache.hudi.utilities.deltastreamer.internal.OnehouseDeltaStreamer.lambda$sync$1(OnehouseDeltaStreamer.java:145)
at org.apache.hudi.common.util.Option.ifPresent(Option.java:97) at
org.apache.hudi.utilities.deltastreamer.internal.OnehouseDeltaStreamer.sync(OnehouseDeltaStreamer.java:142)
at
org.apache.hudi.utilities.deltastreamer.internal.OnehouseDeltaStreamer.main(OnehouseDeltaStreamer.java:196)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498) at
org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) at
org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:955)
at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:180) at
org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:203) at
org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:90) at
org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:1043) at
org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:1052) at
org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) Caused by:
org.apache.hudi.exception.HoodieException:
java.util.ConcurrentModificationException: Cannot resolve conflicts for
overlapping writes at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer$DeltaSyncService.lambda$startService$0(HoodieDeltaStreamer.java:741)
at
java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750) Caused by:
org.apache.hudi.exception.HoodieWriteConflictException:
java.util.ConcurrentModificationException: Cannot resolve conflicts for
overlapping writes at
org.apache.hudi.client.transaction.SimpleConcurrentFileWritesConflictResolutionStrategy.resolveConflict(SimpleConcurrentFileWritesConflictResolutionStrategy.java:102)
at
org.apache.hudi.client.utils.TransactionUtils.lambda$resolveWriteConflictIfAny$0(TransactionUtils.java:85)
at
java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
at
java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742)
at
java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742)
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
at
org.apache.hudi.client.utils.TransactionUtils.resolveWriteConflictIfAny(TransactionUtils.java:79)
at
org.apache.hudi.client.SparkRDDWriteClient.preCommit(SparkRDDWriteClient.java:463)
at
org.apache.hudi.client.BaseHoodieWriteClient.commitStats(BaseHoodieWriteClient.java:243)
at
org.apache.hudi.client.SparkRDDWriteClient.commit(SparkRDDWriteClient.java:120)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.writeToSink(DeltaSync.java:697)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.syncOnce(DeltaSync.java:358)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer$DeltaSyncService.lambda$startService$0(HoodieDeltaStreamer.java:699)
... 4 more {code}
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