[GitHub] [flink] ben-wangz commented on issue #8717: fix issue https://issues.apache.org/jira/browse/FLINK-12725

[GitBox <gi...@apache.org>]

ben-wangz commented on issue #8717: fix issue https://issues.apache.org/jira/browse/FLINK-12725
URL: https://github.com/apache/flink/pull/8717#issuecomment-511351314
 
 
   i cherry-pick this fix to release-1.8.0 and run it with mongo input format (org.mongodb, mongo-hadoop-core, 1.3.0)。 found exception of java.lang.LinkageError: 
   ```
   Caused by: java.lang.LinkageError: loader constraint violation: when resolving method "com.esotericsoftware.kryo.Kryo$DefaultInstantiatorStrategy.setFallbackInstantiatorStrategy(Lorg/objenesis/strategy/InstantiatorStrategy;)V" the class loader (instance of org/apache/flink/runtime/execution/librarycache/FlinkUserCodeClassLoaders$ChildFirstClassLoader) of the current class, org/apache/flink/api/java/typeutils/runtime/WritableSerializer, and the class loader (instance of sun/misc/Launcher$AppClassLoader) for the method's defining class, com/esotericsoftware/kryo/Kryo$DefaultInstantiatorStrategy, have different Class objects for the type org/objenesis/strategy/InstantiatorStrategy used in the signature
           at org.apache.flink.api.java.typeutils.runtime.WritableSerializer.checkKryoInitialized(WritableSerializer.java:131)
           at org.apache.flink.api.java.typeutils.runtime.WritableSerializer.copy(WritableSerializer.java:68)
           at org.apache.flink.api.java.typeutils.runtime.WritableSerializer.copy(WritableSerializer.java:42)
           at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.copy(TupleSerializer.java:111)
           at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.copy(TupleSerializer.java:37)
           at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:577)
           at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:554)
           at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:534)
           at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718)
           at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696)
           at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:104)
           at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:93)
           at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:93)
           at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:57)
           at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:97)
           at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300)
           at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
           at java.lang.Thread.run(Thread.java:745)
   ```

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