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https://issues.apache.org/jira/browse/FLINK-5995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15902363#comment-15902363
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sunjincheng commented on FLINK-5995:
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Hi, [~srichter] I would be very grateful If you can give me some suggestions ?
> Get a Exception when creating the ListStateDescriptor with a TypeInformation
> -----------------------------------------------------------------------------
>
> Key: FLINK-5995
> URL: https://issues.apache.org/jira/browse/FLINK-5995
> Project: Flink
> Issue Type: Bug
> Components: Core
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> When use OperatorState and creating the ListStateDescriptor with a
> TypeInformation，I got a exception. The Exception info is：
> {code}
> org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
> at
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply$mcV$sp(JobManager.scala:915)
> at
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:858)
> at
> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:858)
> at
> scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
> at
> scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
> at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
> at
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: java.lang.IllegalStateException: Serializer not yet initialized.
> at
> org.apache.flink.api.common.state.StateDescriptor.getSerializer(StateDescriptor.java:169)
> at
> org.apache.flink.api.common.state.ListStateDescriptor.getElementSerializer(ListStateDescriptor.java:93)
> at
> org.apache.flink.runtime.state.DefaultOperatorStateBackend.getOperatorState(DefaultOperatorStateBackend.java:110)
> at
> org.apache.flink.runtime.state.DefaultOperatorStateBackend.getOperatorState(DefaultOperatorStateBackend.java:91)
> at
> org.apache.flink.table.runtime.aggregate.UnboundedNonPartitionedProcessingOverProcessFunction.initializeState(UnboundedNonPartitionedProcessingOverProcessFunction.scala:104)
> at
> org.apache.flink.streaming.api.functions.util.StreamingFunctionUtils.tryRestoreFunction(StreamingFunctionUtils.java:178)
> at
> org.apache.flink.streaming.api.functions.util.StreamingFunctionUtils.restoreFunctionState(StreamingFunctionUtils.java:160)
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.initializeState(AbstractUdfStreamOperator.java:106)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:242)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.initializeOperators(StreamTask.java:681)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:669)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:251)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:670)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> So, I'll add `stateDescriptor.initializeSerializerUnlessSet()` call in the
> `getOperatorState` method. I appreciate If anyone can give me some advice?
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