[jira] [Created] (FLINK-18204) NullPointerException when materialize checkpoint

[Shang Yuanchun (Jira)]

shengsheng lin created FLINK-18204:
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             Summary: NullPointerException when  materialize checkpoint
                 Key: FLINK-18204
                 URL: https://issues.apache.org/jira/browse/FLINK-18204
             Project: Flink
          Issue Type: Bug
          Components: Runtime / State Backends
    Affects Versions: 1.7.2
            Reporter: shengsheng lin


Caused by: java.lang.Exception: Could not materialize checkpoint 3398 for operator SelectCepOperator -> Map -> Sink: Unnamed (1/12).
 at org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.handleExecutionException(StreamTask.java:942)
 ... 6 more
Caused by: java.util.concurrent.ExecutionException: java.lang.NullPointerException
 at java.util.concurrent.FutureTask.report(FutureTask.java:122)
 at java.util.concurrent.FutureTask.get(FutureTask.java:192)
 at org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:53)
 at org.apache.flink.streaming.api.operators.OperatorSnapshotFinalizer.<init>(OperatorSnapshotFinalizer.java:47)
 at org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:853)
 ... 5 more
Caused by: java.lang.NullPointerException
 at org.apache.flink.runtime.state.KeyExtractorFunction$1.extractKeyFromElement(KeyExtractorFunction.java:35)
 at org.apache.flink.runtime.state.KeyExtractorFunction$1.extractKeyFromElement(KeyExtractorFunction.java:31)
 at org.apache.flink.runtime.state.KeyGroupPartitioner.reportAllElementKeyGroups(KeyGroupPartitioner.java:153)
 at org.apache.flink.runtime.state.KeyGroupPartitioner.partitionByKeyGroup(KeyGroupPartitioner.java:137)
 at org.apache.flink.runtime.state.heap.HeapPriorityQueueStateSnapshot.getKeyGroupWriter(HeapPriorityQueueStateSnapshot.java:103)
 at org.apache.flink.runtime.state.heap.HeapKeyedStateBackend$HeapSnapshotStrategy$1.performOperation(HeapKeyedStateBackend.java:814)
 at org.apache.flink.runtime.state.heap.HeapKeyedStateBackend$HeapSnapshotStrategy$1.performOperation(HeapKeyedStateBackend.java:759)
 at org.apache.flink.runtime.io.async.AbstractAsyncCallableWithResources.call(AbstractAsyncCallableWithResources.java:75)
 at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 at org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:50)
 ... 7 more



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