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Congxian Qiu(klion26) commented on FLINK-16724: ----------------------------------------------- [~nppoly] thanks for report this issue, This is not the problem of {{ListSerialzier}}, the reason is that {{LongSerialzier}} does not support serializer null value. if you want to serializer null values, you can use {{NullableSerializer instead of }}{{LongSerializer}}. Currently, you will still find that the test will fail if you replace {{LongSerializer}} with {{NullableSerializer}}because the implementation of {{NullableSerializer}}#copy is not correct, I've created FLINK-16916 to track it. > ListSerializer cannot serialize list which containers null > ---------------------------------------------------------- > > Key: FLINK-16724 > URL: https://issues.apache.org/jira/browse/FLINK-16724 > Project: Flink > Issue Type: Bug > Components: Runtime / State Backends > Reporter: Chongchen Chen > Priority: Major > Attachments: list_serializer_err.diff > > > MapSerializer handles null value correctly, but ListSerializer doesn't. The > attachment is the modification of unit test that can reproduce the bug. -- This message was sent by Atlassian Jira (v8.3.4#803005)