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From norman sp <wir12...@studserv.uni-leipzig.de>
Subject Re: Flink CEP AbstractCEPPatternOperator fail after event detection
Date Thu, 07 Apr 2016 05:50:44 GMT
Hi Till,
I used Flink version 1.0.0 and tried all three TimeCharacteristics. 
Not I tried the new Flink 1.0.1 that gives me the following error.
After detecting an event it processes a few stream tuples but then crashes.
I'm not sure how to solve that part of the error message: "This can indicate
that the element belonging to the previous relation has been already pruned,
even though you expect it to be still there"

4>   #######   Warning! FlowPatternEvent:   ####### 
4> (7605e43c-ca20-4524-af5f-23fd8e55d7b9,Intensity - Value,25.0,3.0,75.0)
4> (5025ef64-2b83-4112-b9bd-2d7de46454c9,Pressure - Value,7.0,3.0,21.0)
4> (3d501c5b-b0e2-41e6-bfdc-14c996df6e19,Flow - Value,27.0,3.0,81.0)
04/06/2016 16:41:31	Map -> Sink: Unnamed(4/4) switched to CANCELED 
04/06/2016 16:41:31	AbstractCEPPatternOperator(1/1) switched to FAILED 
java.lang.RuntimeException: Failure happened in filter function.
	at org.apache.flink.cep.nfa.NFA.computeNextStates(NFA.java:292)
	at org.apache.flink.cep.nfa.NFA.process(NFA.java:136)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
	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, FlowOver10, with filter),
StateTransition(IGNORE, start),
]), value: (83788338-b26c-4538-a437-77d1bbf7b348,Pressure -
Value,7.0,5.0,35.0) and timestamp: 1459953675999. 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:269)
	... 8 more

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