Major Description
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.
%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)
Livy log:
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.
Below note indicates that the timeout applies to a inactive session.
LivyConf.scala
// How long will an inactive session be gc-ed. val SESSION_TIMEOUT = Entry("livy.server.session.timeout", "1h")
