[FLINK-9122] NFASerialize deserailze failed and cause other exception

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Duplicate
• Affects Version/s: 1.4.1, 1.4.2
• Component/s: Library / CEP
• Assignee: Unassigned
• Reporter: WenJun Min
• Created: 02/Apr/18 12:01
• Updated: 20/Nov/18 09:23
• Resolved: 20/Nov/18 09:23

Description

when running the job , it failed with the excetion "Caused by: java.lang.IllegalStateException: Could not find previous entry with key: passengerReserveOrder" and when refer to the log on taskmanger, i find error in taskmanager.err

	at org.apache.flink.streaming.runtime.streamstatus.StatusWatermarkValve.inputWatermark(StatusWatermarkValve.java:108)
	at org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:188)
	at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:69)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:263)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:702)
	at java.lang.Thread.run(Thread.java:745)
java.lang.ClassNotFoundException: com.xxxxxxi.app.ReservationCancelMonitorApp$3
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:626)
	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
	at org.apache.flink.cep.nfa.NFA$NFASerializer.deserializeCondition(NFA.java:1171)
	at org.apache.flink.cep.nfa.NFA$NFASerializer.deserializeStates(NFA.java:1129)
	at org.apache.flink.cep.nfa.NFA$NFASerializer.deserialize(NFA.java:917)
	at org.apache.flink.cep.nfa.NFA$NFASerializer.deserialize(NFA.java:820)
	at org.apache.flink.contrib.streaming.state.RocksDBValueState.value(RocksDBValueState.java:82)
	at org.apache.flink.cep.operator.AbstractKeyedCEPPatternOperator.getNFA(AbstractKeyedCEPPatternOperator.java:299)
	at org.apache.flink.cep.operator.AbstractKeyedCEPPatternOperator.onEventTime(AbstractKeyedCEPPatternOperator.java:229)
	at org.apache.flink.streaming.api.operators.HeapInternalTimerService.advanceWatermark(HeapInternalTimerService.java:275)
	at org.apache.flink.streaming.api.operators.InternalTimeServiceManager.advanceWatermark(InternalTimeServiceManager.java:107)

when i change the backend from rocksdb to memory and fs, this is disappear. i use the code in master branch, the problem is still there. i have two questions :

1. Is the "Caused by: java.lang.IllegalStateException: Could not find previous entry with key" this caused by the error in serialization
2. why the exception appear in taskmanager.err file not in taskmanager.log file

@ aljoscha kkl0u

Issue Links

• duplicates: FLINK-8725 Separate NFA-state from NFA in CEP library