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https://issues.apache.org/jira/browse/FLINK-20284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17237105#comment-17237105
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Dian Fu commented on FLINK-20284:
---------------------------------
[~hxbks2ks] Could you help to take a look at this issue?
> Error happens in TaskExecutor when closing JobMaster connection if there was
> a python UDF
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-20284
> URL: https://issues.apache.org/jira/browse/FLINK-20284
> Project: Flink
> Issue Type: Bug
> Components: API / Python
> Affects Versions: 1.12.0
> Reporter: Zhu Zhu
> Priority: Major
> Fix For: 1.12.0
>
>
> When a TaskExecutor successfully finished running a python UDF task and
> disconnecting from JobMaster, errors below will happen. This error, however,
> seems not affect job execution at the moment.
> {code:java}
> 2020-11-20 17:05:21,932 INFO
> org.apache.beam.runners.fnexecution.logging.GrpcLoggingService [] - 1 Beam Fn
> Logging clients still connected during shutdown.
> 2020-11-20 17:05:21,938 WARN
> org.apache.beam.sdk.fn.data.BeamFnDataGrpcMultiplexer [] - Hanged up
> for unknown endpoint.
> 2020-11-20 17:05:22,126 INFO org.apache.flink.runtime.taskmanager.Task
> [] - Source: Custom Source -> select: (f0) -> select:
> (add_one(f0) AS a) -> to: Tuple2 -> Sink: Streaming select table sink (1/1)#0
> (b0c2104dd8f87bb1caf0c83586c22a51) switched from RUNNING to FINISHED.
> 2020-11-20 17:05:22,126 INFO org.apache.flink.runtime.taskmanager.Task
> [] - Freeing task resources for Source: Custom Source -> select:
> (f0) -> select: (add_one(f0) AS a) -> to: Tuple2 -> Sink: Streaming select
> table sink (1/1)#0 (b0c2104dd8f87bb1caf0c83586c22a51).
> 2020-11-20 17:05:22,128 INFO
> org.apache.flink.runtime.taskexecutor.TaskExecutor [] -
> Un-registering task and sending final execution state FINISHED to JobManager
> for task Source: Custom Source -> select: (f0) -> select: (add_one(f0) AS a)
> -> to: Tuple2 -> Sink: Streaming select table sink (1/1)#0
> b0c2104dd8f87bb1caf0c83586c22a51.
> 2020-11-20 17:05:22,156 INFO
> org.apache.flink.runtime.taskexecutor.slot.TaskSlotTableImpl [] - Free slot
> TaskSlot(index:0, state:ACTIVE, resource profile:
> ResourceProfile{cpuCores=1.0000000000000000, taskHeapMemory=384.000mb
> (402653174 bytes), taskOffHeapMemory=0 bytes, managedMemory=512.000mb
> (536870920 bytes), networkMemory=128.000mb (134217730 bytes)}, allocationId:
> b67c3307dcf93757adfb4f0f9f7b8c7b, jobId: d05f32162f38ec3ec813c4621bc106d9).
> 2020-11-20 17:05:22,157 INFO
> org.apache.flink.runtime.taskexecutor.DefaultJobLeaderService [] - Remove job
> d05f32162f38ec3ec813c4621bc106d9 from job leader monitoring.
> 2020-11-20 17:05:22,157 INFO
> org.apache.flink.runtime.taskexecutor.TaskExecutor [] - Close
> JobManager connection for job d05f32162f38ec3ec813c4621bc106d9.
> 2020-11-20 17:05:23,064 ERROR
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.DefaultPromise.rejectedExecution
> [] - Failed to submit a listener notification task. Event loop shut down?
> java.lang.NoClassDefFoundError:
> org/apache/beam/vendor/grpc/v1p26p0/io/netty/util/concurrent/GlobalEventExecutor$2
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.GlobalEventExecutor.startThread(GlobalEventExecutor.java:227)
>
> ~[blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.GlobalEventExecutor.execute(GlobalEventExecutor.java:215)
>
> ~[blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.DefaultPromise.safeExecute(DefaultPromise.java:841)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:498)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:615)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:604)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:96)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1089)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>
> [blob_p-bd7a5d615512eb8a2e856e7c1630a0c22fca7cf3-ff27946fda7e2b8cb24ea56d505b689e:1.12-SNAPSHOT]
> at java.lang.Thread.run(Thread.java:748) [?:1.8.0_261]
> Caused by: java.lang.ClassNotFoundException:
> org.apache.beam.vendor.grpc.v1p26p0.io.netty.util.concurrent.GlobalEventExecutor$2
> at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
> ~[?:1.8.0_261]
> at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
> ~[?:1.8.0_261]
> at
> org.apache.flink.util.FlinkUserCodeClassLoader.loadClassWithoutExceptionHandling(FlinkUserCodeClassLoader.java:63)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.util.ChildFirstClassLoader.loadClassWithoutExceptionHandling(ChildFirstClassLoader.java:72)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at
> org.apache.flink.util.FlinkUserCodeClassLoader.loadClass(FlinkUserCodeClassLoader.java:49)
> ~[flink-dist_2.11-1.12-SNAPSHOT.jar:1.12-SNAPSHOT]
> at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
> ~[?:1.8.0_261]
> ... 11 more
> {code}
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