Github user gss2002 commented on the issue:
https://github.com/apache/zeppelin/pull/1447
@spektom / @zjffdu @purechoc there is definitely an additional condition.
Not sure if it's because the ConcurrentHashMaps are not being used correctly.
But the exception doesn't get caught completely or correctly at times with the
fix proposed here..
ERROR [2016-10-19 14:19:57,638] ({pool-2-thread-11}
LivyHelper.java[executeHTTP]:378) - Error with 404 StatusCode: "Session '9' not
found."
ERROR [2016-10-19 14:19:57,638] ({pool-2-thread-11}
LivyHelper.java[interpretInput]:229) - error in interpretInput
org.apache.zeppelin.livy.LivyHelper$LivyNoSessionException: Session not
found, Livy server would have restarted, or lost session.
at
org.apache.zeppelin.livy.LivyHelper.executeCommand(LivyHelper.java:312)
at org.apache.zeppelin.livy.LivyHelper.interpret(LivyHelper.java:241)
at
org.apache.zeppelin.livy.LivyHelper.interpretInput(LivyHelper.java:189)
at
org.apache.zeppelin.livy.LivySparkInterpreter.interpret(LivySparkInterpreter.java:106)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.interpret(LazyOpenInterpreter.java:94)
at
org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:390)
at org.apache.zeppelin.scheduler.Job.run(Job.java:176)
at
org.apache.zeppelin.scheduler.FIFOScheduler$1.run(FIFOScheduler.java:139)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
INFO [2016-10-19 14:19:57,639] ({pool-2-thread-11}
SchedulerFactory.java[jobFinished]:137) - Job remoteInterpretJob_1476901197622
finished by scheduler org.apache.zeppelin.livy.LivySparkInterpreter37814848
INFO [2016-10-19 14:19:57,819] ({pool-2-thread-34}
SchedulerFactory.java[jobStarted]:131) - Job remoteInterpretJob_1476901197819
started by scheduler org.apache.zeppelin.livy.LivySparkInterpreter37814848
ERROR [2016-10-19 14:19:57,835] ({pool-2-thread-34}
LivyHelper.java[executeHTTP]:378) - Error with 404 StatusCode: "Session '9' not
found."
ERROR [2016-10-19 14:19:57,835] ({pool-2-thread-34}
LivyHelper.java[interpretInput]:229) - error in interpretInput
org.apache.zeppelin.livy.LivyHelper$LivyNoSessionException: Session not
found, Livy server would have restarted, or lost session.
at
org.apache.zeppelin.livy.LivyHelper.executeCommand(LivyHelper.java:312)
at org.apache.zeppelin.livy.LivyHelper.interpret(LivyHelper.java:241)
at
org.apache.zeppelin.livy.LivyHelper.interpretInput(LivyHelper.java:189)
at
org.apache.zeppelin.livy.LivySparkInterpreter.interpret(LivySparkInterpreter.java:106)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.interpret(LazyOpenInterpreter.java:94)
at
org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:390)
at org.apache.zeppelin.scheduler.Job.run(Job.java:176)
at
org.apache.zeppelin.scheduler.FIFOScheduler$1.run(FIFOScheduler.java:139)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
INFO [2016-10-19 14:19:57,836] ({pool-2-thread-34}
SchedulerFactory.java[jobFinished]:137) - Job remoteInterpretJob_1476901197819
finished by scheduler org.apache.zeppelin.livy.LivySparkInterpreter37814848
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