Aljoscha Krettek created FLINK-4165:
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Summary: Event-Time CEP Job Sometimes Fails After Restart
Key: FLINK-4165
URL: https://issues.apache.org/jira/browse/FLINK-4165
Project: Flink
Issue Type: Bug
Components: CEP
Affects Versions: 1.0.3, 1.0.2, 1.0.1, 1.0.0, 1.1.0
Reporter: Aljoscha Krettek
Priority: Blocker
This occurs sometimes after FLINK-4162 is fixed. About 40 % of the time, when
restarting a job it fails with this exception:
{code}
java.lang.RuntimeException: Failure happened in filter function.
at org.apache.flink.cep.nfa.NFA.computeNextStates(NFA.java:316)
at org.apache.flink.cep.nfa.NFA.process(NFA.java:160)
at
org.apache.flink.cep.operator.KeyedCEPPatternOperator.processEvent(KeyedCEPPatternOperator.java:48)
at
org.apache.flink.cep.operator.AbstractKeyedCEPPatternOperator.processWatermark(AbstractKeyedCEPPatternOperator.java:167)
at
org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:165)
at
org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:66)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:265)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:588)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Could not find previous shared
buffer entry with key: State(start, Normal, [
StateTransition(TAKE, warning, with filter),
]), value: Event{id='three', eventType='start', timestamp=25045188001} and
timestamp: 25045188001. This can indicate that the element belonging to the
previous relation has been already pruned, even though you expect it to be
still there.
at org.apache.flink.cep.nfa.SharedBuffer.put(SharedBuffer.java:104)
at org.apache.flink.cep.nfa.NFA.computeNextStates(NFA.java:293)
... 8 more
{code}
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