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https://issues.apache.org/jira/browse/LIVY-547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Saisai Shao resolved LIVY-547.
------------------------------
       Resolution: Fixed
    Fix Version/s: 0.7.0

> Livy kills session after livy.server.session.timeout even if the session is 
> active
> ----------------------------------------------------------------------------------
>
>                 Key: LIVY-547
>                 URL: https://issues.apache.org/jira/browse/LIVY-547
>             Project: Livy
>          Issue Type: Bug
>          Components: Server
>            Reporter: Sandeep Nemuri
>            Priority: Major
>             Fix For: 0.7.0
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> Livy kills session after {{livy.server.session.timeout}} even if the session 
> is active.
> Code that runs more than the {{livy.server.session.timeout}} with 
> intermediate sleeps.
> {noformat}
> %pyspark 
> import time 
> import datetime 
> import random
> def inside(p):
>     x, y = random.random(), random.random()
>     return x*x + y*y < 1
> NUM_SAMPLES=10
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> print("waiting for 100 s") 
> time.sleep(100) 
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> print("waiting for 200 s") 
> time.sleep(200) 
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> print("waiting for 300 s1") 
> time.sleep(300)
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> print("waiting for 300 s2") 
> time.sleep(300) 
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> print("waiting for 300 s3") 
> time.sleep(300) 
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> print("waiting for 300 s4") 
> time.sleep(300) 
> count = sc.parallelize(xrange(0, NUM_SAMPLES)) \
>              .filter(inside).count()
> print "Pi is roughly %f" % (4.0 * count / NUM_SAMPLES)
> {noformat}
> Livy log:
> {noformat}
> 19/01/07 17:38:59 INFO InteractiveSession: Interactive session 14 created 
> [appid: application_1546711709239_0002, owner: zeppelin-hwc327, proxyUser: 
> Some(admin), state: idle, kind: shared, info: 
> {driverLogUrl=http://hwc327-node3.hogwarts-labs.com:8042/node/containerlogs/container_e18_1546711709239_0002_01_000001/admin,
>  
> sparkUiUrl=http://hwc327-node2.hogwarts-labs.com:8088/proxy/application_1546711709239_0002/}]
> 19/01/07 17:52:46 INFO InteractiveSession: Stopping InteractiveSession 14...
> 19/01/07 17:52:56 WARN RSCClient: Exception while waiting for end session 
> reply.
> java.util.concurrent.TimeoutException
>         at io.netty.util.concurrent.AbstractFuture.get(AbstractFuture.java:49)
>         at org.apache.livy.rsc.RSCClient.stop(RSCClient.java:223)
>         at 
> org.apache.livy.server.interactive.InteractiveSession$$anonfun$stopSession$1.apply(InteractiveSession.scala:471)
>         at 
> org.apache.livy.server.interactive.InteractiveSession$$anonfun$stopSession$1.apply(InteractiveSession.scala:471)
>         at scala.Option.foreach(Option.scala:236)
>         at 
> org.apache.livy.server.interactive.InteractiveSession.stopSession(InteractiveSession.scala:471)
>         at 
> org.apache.livy.sessions.Session$$anonfun$stop$1.apply$mcV$sp(Session.scala:174)
>         at 
> org.apache.livy.sessions.Session$$anonfun$stop$1.apply(Session.scala:171)
>         at 
> org.apache.livy.sessions.Session$$anonfun$stop$1.apply(Session.scala:171)
>         at 
> scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
>         at 
> scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
>         at 
> scala.concurrent.impl.ExecutionContextImpl$$anon$3.exec(ExecutionContextImpl.scala:107)
>         at 
> scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
>         at 
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
>         at 
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
>         at 
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> 19/01/07 17:52:56 WARN RpcDispatcher: [ClientProtocol] Closing RPC channel 
> with 1 outstanding RPCs.
> 19/01/07 17:52:56 WARN InteractiveSession: Failed to stop RSCDriver. Killing 
> it...
> 19/01/07 17:52:56 INFO YarnClientImpl: Killed application 
> application_1546711709239_0002
> 19/01/07 17:52:56 INFO InteractiveSession: Stopped InteractiveSession 14.
> {noformat}
>  Below note indicates that the timeout applies to a inactive session.
> {code:java|title=LivyConf.scala}
>   // How long will an inactive session be gc-ed.
>   val SESSION_TIMEOUT = Entry("livy.server.session.timeout", "1h")
> {code}



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