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Posted to dev@gearpump.apache.org by "Huafeng Wang (JIRA)" <ji...@apache.org> on 2016/05/20 01:45:13 UTC
[jira] [Commented] (GEARPUMP-147) java.lang.ClassNotFoundException
when running on worker with worker.executor-share-same-jvm-as-worker = true
[ https://issues.apache.org/jira/browse/GEARPUMP-147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15292536#comment-15292536 ]
Huafeng Wang commented on GEARPUMP-147:
---------------------------------------
Normally, if worker.executor-share-same-jvm-as-worker=false, and when launching an Executor, Worker will copy the application jar to local and add the jar path to new JVM's classpath that contains the Executor.
While worker.executor-share-same-jvm-as-worker=ture, there is no new JVM will be created and the application's jar is not on the classpath of Worker, so the ClassNotFoundException was thrown. I think that's the root cause.
> java.lang.ClassNotFoundException when running on worker with worker.executor-share-same-jvm-as-worker = true
> ------------------------------------------------------------------------------------------------------------
>
> Key: GEARPUMP-147
> URL: https://issues.apache.org/jira/browse/GEARPUMP-147
> Project: Apache Gearpump
> Issue Type: Task
> Reporter: Karol Brejna
> Attachments: gear.pc.conf, gear.pc.slimworker.conf, logs.slimworker.zip, prepare.sh
>
>
> Doing GEARPUMP-146 I hit a problem: I was able to run a master on pc and a worker on raspi. After deploying wordcountjava-2.11-0.8.0-assembly.jar the example didn't start.
> I reproduced this on "pure pc" cluster.
> I've prepared dedicated config files:
> * gear.pc.conf - normal (default) configuration for master and workers ran on a PC
> * gear.pc.slimworker.conf - intends to have lower requirements for memory, cpu - to be used on a device (raspi, edison)
> *Obtaining binary and creating config files*
> {code}
> wget https://github.com/gearpump/gearpump/releases/download/0.8.0/gearpump-2.11-0.8.0.zip
> unzip gearpump-2.11-0.8.0.zip
> cd gearpump-2.11-0.8.0
> cp conf/gear.conf conf/gear.original.conf
> cp conf/gear.conf conf/gear.pc.conf
> cp conf/gear.conf conf/gear.pc.slimworker.conf
> {code}
> *Preparing "PC" conf*
> The only real change here is putting the IP of the machine that will run the master:
> {code}
> cluster {
> masters = ["192.168.1.115:3000"]
> }
>
> hostname = "192.168.1.115"
> {code}
>
> *Preparing device conf*
> Compared to previous config, this config should set up less worker slots, smaller -Xmx jvm switch for worker, and executor-share-same-jvm-as-worker set to true:
> {code}
> worker.slots = 100
> worker.executor-share-same-jvm-as-worker = true
> executor {
> vmargs = "-server -Xms512M -Xmx512M -Xss1M -XX:+HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=80 -XX:+UseParNewGC -XX:NewRatio=3 -Djava.rmi.server.hostname=localhost"
> extraClasspath = ""
> }
> {code}
> *Running the cluster:*
> {code}
> echo "Starting the master"
> cp conf/gear.pc.conf conf/gear.conf
> bin/master -ip 192.168.1.115 -port 3000 &
> echo "Starting services"
> bin/services &
> echo "Starting a worker (configured as on the device)"
> cp conf/gear.pc.slimworker.conf conf/gear.conf
> bin/worker &
> {code}
> *Deploing the DAG*
> I've deployed wordcountjava-2.11-0.8.0-assembly.jar.
> The app deploys, but doesn't run.
> (After changing worker.executor-share-same-jvm-as-worker to false and restarting the cluster, example dag works.)
> See the attached logs:
> {code}
> 2016-05-18 08:47:31,453 ERROR OneForOneStrategy: io.gearpump.streaming.examples.wordcountjava.Split
> java.lang.ClassNotFoundException: io.gearpump.streaming.examples.wordcountjava.Split
> at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at io.gearpump.streaming.task.TaskUtil$.loadClass(TaskUtil.scala:30)
> at io.gearpump.streaming.executor.TaskLauncher.launch(TaskLauncher.scala:55)
> at io.gearpump.streaming.executor.Executor$$anonfun$dynamicDagPhase1$1.applyOrElse(Executor.scala:147)
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170)
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)
> at akka.actor.Actor$class.aroundReceive(Actor.scala:480)
> at io.gearpump.streaming.executor.Executor.aroundReceive(Executor.scala:55)
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
> at akka.actor.ActorCell.invoke(ActorCell.scala:495)
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
> at akka.dispatch.Mailbox.run(Mailbox.scala:224)
> at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
> 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)
> {code}
>
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