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https://issues.apache.org/jira/browse/FLINK-13612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16921400#comment-16921400
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Congxian Qiu(klion26) commented on FLINK-13612:
-----------------------------------------------
[~Vow] As this has been fixed in 1.9, could you please close this issue?
> StateDescriptor Loading Error NPE at FlinkKafkaProducer011 with High
> Concurrency Initialization
> -----------------------------------------------------------------------------------------------
>
> Key: FLINK-13612
> URL: https://issues.apache.org/jira/browse/FLINK-13612
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: shaded-7.0, 1.6.3, 1.6.4, 1.7.2
> Reporter: weiyunqing
> Priority: Major
> Fix For: 1.6.3, 1.6.4, 1.7.2
>
> Attachments: screenshot-1.png
>
>
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer011#NEXT_TRANSACTIONAL_ID_HINT_DESCRIPTOR
> The NEXT_TRANSACTIONAL_ID_HINT_DESCRIPTOR variable state in
> FlinkKafkaProducer011 is modified with static
> NullPointerException occur in high concurrency when
> initializeSerializerUnlessSet method is executed
>
> java.lang.NullPointerException at
> org.apache.flink.api.common.state.StateDescriptor.initializeSerializerUnlessSet(StateDescriptor.java:264)
> at
> org.apache.flink.runtime.state.DefaultOperatorStateBackend.getListState(DefaultOperatorStateBackend.java:730)
> at
> org.apache.flink.runtime.state.DefaultOperatorStateBackend.getUnionListState(DefaultOperatorStateBackend.java:271)
> at
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer011.initializeState(FlinkKafkaProducer011.java:837)
> at
> org.apache.flink.streaming.util.functions.StreamingFunctionUtils.tryRestoreFunction(StreamingFunctionUtils.java:178)
> at
> org.apache.flink.streaming.util.functions.StreamingFunctionUtils.restoreFunctionState(StreamingFunctionUtils.java:160)
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.initializeState(AbstractUdfStreamOperator.java:96)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:281)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:730)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:295)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:720) at
> java.lang.Thread.run(Thread.java:748)
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