[
https://issues.apache.org/jira/browse/FLINK-10827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16681085#comment-16681085
]
ASF GitHub Bot commented on FLINK-10827:
----------------------------------------
zentol commented on issue #7061: [FLINK-10827][tests] Add test for duplicate()
to SerializerTestBase
URL: https://github.com/apache/flink/pull/7061#issuecomment-437292479
Related test-failure:
```
testDuplicate(org.apache.flink.api.java.typeutils.runtime.PojoSubclassSerializerTest)
Time elapsed: 0.101 sec <<< ERROR!
java.lang.IllegalStateException: Concurrent access to KryoSerializer. Thread
1: Thread-240 , Thread 2: Thread-241
at
org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.enterExclusiveThread(KryoSerializer.java:623)
at
org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.copy(KryoSerializer.java:211)
at
org.apache.flink.api.java.typeutils.runtime.PojoSerializer.copy(PojoSerializer.java:256)
at
org.apache.flink.api.common.typeutils.SerializerTestBase$SerializerRunner.run(SerializerTestBase.java:597)
```
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> Add test for duplicate() to SerializerTestBase
> ----------------------------------------------
>
> Key: FLINK-10827
> URL: https://issues.apache.org/jira/browse/FLINK-10827
> Project: Flink
> Issue Type: Test
> Components: Tests
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.7.0
>
>
> In the past, we had many bugs from type serializers that have not properly
> implemented the {{duplicate()}} method in a proper way. A very common error
> is to forget about creating a deep copy of some fields that can lead to
> concurrency problems in the backend.
> We should add a test case for that tests duplicated serializer from different
> threads to expose concurrency problems.
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