baeminbo opened a new pull request, #28548:
URL: https://github.com/apache/beam/pull/28548
This is another case of #20970 (harmless error logs with gRPC leak).
`BigQueryIO.read()` with `Method.DIRECT_READ` in Dataflow **streaming** jobs
can cause Dataflow to output the gRPC leak error logs. From the stacktrace
below, I believe the root cause is `UnboundedReaderIterator.close()` doesn't
close the `reader`.
```
java.lang.RuntimeException: ManagedChannel allocation site
at
io.grpc.internal.ManagedChannelOrphanWrapper$ManagedChannelReference.<init>(ManagedChannelOrphanWrapper.java:102)
at
io.grpc.internal.ManagedChannelOrphanWrapper.<init>(ManagedChannelOrphanWrapper.java:60)
at
io.grpc.internal.ManagedChannelOrphanWrapper.<init>(ManagedChannelOrphanWrapper.java:51)
at
io.grpc.internal.ManagedChannelImplBuilder.build(ManagedChannelImplBuilder.java:631)
at
io.grpc.internal.AbstractManagedChannelImplBuilder.build(AbstractManagedChannelImplBuilder.java:297)
at
com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createSingleChannel(InstantiatingGrpcChannelProvider.java:391)
at com.google.api.gax.grpc.ChannelPool.<init>(ChannelPool.java:107)
at com.google.api.gax.grpc.ChannelPool.create(ChannelPool.java:85)
at
com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createChannel(InstantiatingGrpcChannelProvider.java:237)
at
com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.getTransportChannel(InstantiatingGrpcChannelProvider.java:231)
at com.google.api.gax.rpc.ClientContext.create(ClientContext.java:236)
at
com.google.cloud.bigquery.storage.v1.stub.EnhancedBigQueryReadStub.create(EnhancedBigQueryReadStub.java:99)
at
com.google.cloud.bigquery.storage.v1.BigQueryReadClient.<init>(BigQueryReadClient.java:130)
at
com.google.cloud.bigquery.storage.v1.BigQueryReadClient.create(BigQueryReadClient.java:110)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl$StorageClientImpl.<init>(BigQueryServicesImpl.java:1667)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl$StorageClientImpl.<init>(BigQueryServicesImpl.java:1598)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryServicesImpl.getStorageClient(BigQueryServicesImpl.java:201)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageStreamSource$BigQueryStorageStreamReader.<init>(BigQueryStorageStreamSource.java:194)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageStreamSource$BigQueryStorageStreamReader.<init>(BigQueryStorageStreamSource.java:147)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageStreamSource.createReader(BigQueryStorageStreamSource.java:138)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageStreamSource.createReader(BigQueryStorageStreamSource.java:56)
at
org.apache.beam.runners.core.construction.UnboundedReadFromBoundedSource$BoundedToUnboundedSourceAdapter$ResidualSource.advance(UnboundedReadFromBoundedSource.java:473)
at
org.apache.beam.runners.core.construction.UnboundedReadFromBoundedSource$BoundedToUnboundedSourceAdapter$ResidualSource.access$300(UnboundedReadFromBoundedSource.java:452)
at
org.apache.beam.runners.core.construction.UnboundedReadFromBoundedSource$BoundedToUnboundedSourceAdapter$Reader.advance(UnboundedReadFromBoundedSource.java:304)
at
org.apache.beam.runners.core.construction.UnboundedReadFromBoundedSource$BoundedToUnboundedSourceAdapter$Reader.start(UnboundedReadFromBoundedSource.java:297)
at
org.apache.beam.runners.dataflow.worker.WorkerCustomSources$UnboundedReaderIterator.start(WorkerCustomSources.java:816)
at
org.apache.beam.runners.dataflow.worker.util.common.worker.ReadOperation$SynchronizedReaderIterator.start(ReadOperation.java:381)
at
org.apache.beam.runners.dataflow.worker.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:211)
at
org.apache.beam.runners.dataflow.worker.util.common.worker.ReadOperation.start(ReadOperation.java:169)
at
org.apache.beam.runners.dataflow.worker.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:83)
at
org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker.process(StreamingDataflowWorker.java:1433)
at
org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker.access$800(StreamingDataflowWorker.java:155)
at
org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker$4.run(StreamingDataflowWorker.java:1056)
at
org.apache.beam.runners.dataflow.worker.util.BoundedQueueExecutor.lambda$executeLockHeld$0(BoundedQueueExecutor.java:163)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
```
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