[jira] [Created] (FLINK-18464) ClassCastException during namespace serialization for checkpoint (Heap)

[Shang Yuanchun (Jira)]

Roman Khachatryan created FLINK-18464:
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             Summary: ClassCastException during namespace serialization for checkpoint (Heap)
                 Key: FLINK-18464
                 URL: https://issues.apache.org/jira/browse/FLINK-18464
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Checkpointing, Runtime / Task
    Affects Versions: 1.9.3
            Reporter: Roman Khachatryan


From [thread|http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Checkpoint-failed-because-of-TimeWindow-cannot-be-cast-to-VoidNamespace-td36310.html]
{quote}I'm using flink 1.9 on Mesos and I try to use my own trigger and evictor. The state is stored to memory.
{quote}
 
 
{code:java}
input.setParallelism(processParallelism)
        .assignTimestampsAndWatermarks(new UETimeAssigner)
        .keyBy(_.key)
        .window(TumblingEventTimeWindows.of(Time.minutes(20)))
        .trigger(new MyTrigger)
        .evictor(new MyEvictor)
        .process(new MyFunction).setParallelism(aggregateParallelism)
        .addSink(kafkaSink).setParallelism(sinkParallelism)
        .name("kafka-record-sink")

java.lang.Exception: Could not materialize checkpoint 1 for operator Window(TumblingEventTimeWindows(1200000), JoinTrigger, JoinEvictor, ScalaProcessWindowFunctionWrapper) -> Sink: kafka-record-sink (2/5).     at org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.handleExecutionException(StreamTask.java:1100)     at org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:1042)     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)     at java.lang.Thread.run(Thread.java:748) Caused by: java.util.concurrent.ExecutionException: java.lang.ClassCastException: org.apache.flink.streaming.api.windowing.windows.TimeWindow cannot be cast to org.apache.flink.runtime.state.VoidNamespace     at java.util.concurrent.FutureTask.report(FutureTask.java:122)     at java.util.concurrent.FutureTask.get(FutureTask.java:192)     at org.apache.flink.runtime.concurrent.FutureUtils.runIfNotDoneAndGet(FutureUtils.java:450)     at org.apache.flink.streaming.api.operators.OperatorSnapshotFinalizer.<init>(OperatorSnapshotFinalizer.java:47)     at org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:1011)     ... 3 more Caused by: java.lang.ClassCastException: org.apache.flink.streaming.api.windowing.windows.TimeWindow cannot be cast to org.apache.flink.runtime.state.VoidNamespace     at org.apache.flink.runtime.state.VoidNamespaceSerializer.serialize(VoidNamespaceSerializer.java:32)     at org.apache.flink.runtime.state.heap.CopyOnWriteStateMapSnapshot.writeState(CopyOnWriteStateMapSnapshot.java:114)     at org.apache.flink.runtime.state.heap.AbstractStateTableSnapshot.writeStateInKeyGroup(AbstractStateTableSnapshot.java:121)     at org.apache.flink.runtime.state.heap.CopyOnWriteStateTableSnapshot.writeStateInKeyGroup(CopyOnWriteStateTableSnapshot.java:37)     at org.apache.flink.runtime.state.heap.HeapSnapshotStrategy$1.callInternal(HeapSnapshotStrategy.java:191)     at org.apache.flink.runtime.state.heap.HeapSnapshotStrategy$1.callInternal(HeapSnapshotStrategy.java:158)     at org.apache.flink.runtime.state.AsyncSnapshotCallable.call(AsyncSnapshotCallable.java:75)     at java.util.concurrent.FutureTask.run(FutureTask.java:266)     at org.apache.flink.runtime.concurrent.FutureUtils.runIfNotDoneAndGet(FutureUtils.java:447)     ... 5 more  {code}
 



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