It was a class contained in a dependency I call in a mapPartition or map function..
On Tue, Jul 21, 2015 at 4:09 PM, Stephan Ewen <se...@apache.org> wrote: > Do you know which component logs via java.utils.logging? > > On Tue, Jul 21, 2015 at 4:02 PM, Flavio Pompermaier <pomperma...@okkam.it> > wrote: > >> I think that the problem is that the error was caused by a class logging >> through java.utils.logging and in the have those logs working I had to put >> *SLF4JBridgeHandler.install();* at the beginning of the main(). >> Probably this should be documented..actually I don't know why this worked >> :) >> >> >> On Tue, Jul 21, 2015 at 3:29 PM, Stephan Ewen <se...@apache.org> wrote: >> >>> Exceptions are swallowed upon canceling (because canceling has usually >>> followup exceptions). >>> >>> Root error cause exceptions should never be swallowed. >>> >>> Do you have a specific place in mind where that happens? >>> >>> On Mon, Jun 29, 2015 at 4:49 PM, Flavio Pompermaier < >>> pomperma...@okkam.it> wrote: >>> >>>> I think that actually there's an Exception thrown within the code that >>>> I suspect it's not reported anywhere..could it be? >>>> >>>> On Mon, Jun 29, 2015 at 3:28 PM, Flavio Pompermaier < >>>> pomperma...@okkam.it> wrote: >>>> >>>>> Which file and which JVM options do I have to modify to try options 1 >>>>> and 3..? >>>>> >>>>> 1. Don't fill the JVMs up to the limit with objects. Give more >>>>> memory to the JVM, or give less memory to Flink managed memory >>>>> 2. Use more JVMs, i.e., a higher parallelism >>>>> 3. Use a concurrent garbage collector, like G1 >>>>> >>>>> Actually, when I run the code from Eclipse I see an exception do to an >>>>> error in the data (because I try to read a URI that contains illegal >>>>> characters) but I don't think the program reach that point, I don't see >>>>> anywhere an exception and the error occur later on in the code.. >>>>> >>>>> However, all of your options seems related to a scalability problem, >>>>> where I should add more resources to complete the work...while it works >>>>> locally in the IDE where I have less resources (except the gc that I use >>>>> default settings while I don't know if the cluster has some default >>>>> ones)..isn't it strange? >>>>> >>>>> On Mon, Jun 29, 2015 at 2:29 PM, Stephan Ewen <se...@apache.org> >>>>> wrote: >>>>> >>>>>> Hi Flavio! >>>>>> >>>>>> I had a look at the logs. There seems nothing suspicious - at some >>>>>> point, the TaskManager and JobManager declare each other unreachable. >>>>>> >>>>>> A pretty common cause for that is that the JVMs stall for a long time >>>>>> due to garbage collection. The JobManager cannot see the difference >>>>>> between >>>>>> a JVM that is irresponsive (due to garbage collection) and a JVM that is >>>>>> dead. >>>>>> >>>>>> Here is what you can do to prevent long garbage collection stalls: >>>>>> >>>>>> - Don't fill the JVMs up to the limit with objects. Give more memory >>>>>> to the JVM, or give less memory to Flink managed memory. >>>>>> - Use more JVMs, i.e., a higher parallelism. >>>>>> - Use a concurrent garbage collector, like G1. >>>>>> >>>>>> >>>>>> Greetings, >>>>>> Stephan >>>>>> >>>>>> >>>>>> On Mon, Jun 29, 2015 at 12:39 PM, Stephan Ewen <se...@apache.org> >>>>>> wrote: >>>>>> >>>>>>> Hi Flavio! >>>>>>> >>>>>>> Can you post the JobManager's log here? It should have the message >>>>>>> about what is going wrong... >>>>>>> >>>>>>> Stephan >>>>>>> >>>>>>> >>>>>>> On Mon, Jun 29, 2015 at 11:43 AM, Flavio Pompermaier < >>>>>>> pomperma...@okkam.it> wrote: >>>>>>> >>>>>>>> Hi to all, >>>>>>>> >>>>>>>> I'm restarting the discussion about a problem I alredy dicussed on >>>>>>>> this mailing list (but that started with a different subject). >>>>>>>> I'm running Flink 0.9.0 on CDH 5.1.3 so I compiled the sources as: >>>>>>>> >>>>>>>> mvn clean install -Dhadoop.version=2.3.0-cdh5.1.3 >>>>>>>> -Dhbase.version=0.98.1-cdh5.1.3 >>>>>>>> -Dhadoop.core.version=2.3.0-mr1-cdh5.1.3 >>>>>>>> -DskipTests -Pvendor-repos >>>>>>>> >>>>>>>> The problem I'm facing is that the cluster start successfully but >>>>>>>> when I run my job (from the web-client) I get, after some time, this >>>>>>>> exception: >>>>>>>> >>>>>>>> 16:35:41,636 WARN akka.remote.RemoteWatcher >>>>>>>> - Detected unreachable: [akka.tcp:// >>>>>>>> flink@192.168.234.83:6123] >>>>>>>> 16:35:46,605 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>>>>> - Disconnecting from JobManager: JobManager is no longer reachable >>>>>>>> 16:35:46,614 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>>>>> - Cancelling all computations and discarding all cached data. >>>>>>>> 16:35:46,644 INFO org.apache.flink.runtime.taskmanager.Task >>>>>>>> - Attempting to fail task externally CHAIN GroupReduce >>>>>>>> (GroupReduce at compactDataSources(MyClass.java:213)) -> >>>>>>>> Combine(Distinct >>>>>>>> at compactDataSources(MyClass.java:213)) (8/36) >>>>>>>> 16:35:46,669 INFO org.apache.flink.runtime.taskmanager.Task >>>>>>>> - CHAIN GroupReduce (GroupReduce at >>>>>>>> compactDataSources(MyClass.java:213)) -> Combine(Distinct at >>>>>>>> compactDataSources(MyClass.java:213)) (8/36) switched to FAILED with >>>>>>>> exception. >>>>>>>> java.lang.Exception: Disconnecting from JobManager: JobManager is >>>>>>>> no longer reachable >>>>>>>> at org.apache.flink.runtime.taskmanager.TaskManager.org >>>>>>>> $apache$flink$runtime$taskmanager$TaskManager$$handleJobManagerDisconnect(TaskManager.scala:741) >>>>>>>> at >>>>>>>> org.apache.flink.runtime.taskmanager.TaskManager$$anonfun$receiveWithLogMessages$1.applyOrElse(TaskManager.scala:267) >>>>>>>> at >>>>>>>> scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:33) >>>>>>>> at >>>>>>>> scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:33) >>>>>>>> at >>>>>>>> scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:25) >>>>>>>> at >>>>>>>> org.apache.flink.runtime.ActorLogMessages$$anon$1.apply(ActorLogMessages.scala:36) >>>>>>>> at >>>>>>>> org.apache.flink.runtime.ActorLogMessages$$anon$1.apply(ActorLogMessages.scala:29) >>>>>>>> at >>>>>>>> scala.PartialFunction$class.applyOrElse(PartialFunction.scala:118) >>>>>>>> at >>>>>>>> org.apache.flink.runtime.ActorLogMessages$$anon$1.applyOrElse(ActorLogMessages.scala:29) >>>>>>>> at akka.actor.Actor$class.aroundReceive(Actor.scala:465) >>>>>>>> at >>>>>>>> org.apache.flink.runtime.taskmanager.TaskManager.aroundReceive(TaskManager.scala:114) >>>>>>>> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) >>>>>>>> at >>>>>>>> akka.actor.dungeon.DeathWatch$class.receivedTerminated(DeathWatch.scala:46) >>>>>>>> at >>>>>>>> akka.actor.ActorCell.receivedTerminated(ActorCell.scala:369) >>>>>>>> at >>>>>>>> akka.actor.ActorCell.autoReceiveMessage(ActorCell.scala:501) >>>>>>>> at akka.actor.ActorCell.invoke(ActorCell.scala:486) >>>>>>>> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254) >>>>>>>> at akka.dispatch.Mailbox.run(Mailbox.scala:221) >>>>>>>> at akka.dispatch.Mailbox.exec(Mailbox.scala:231) >>>>>>>> at >>>>>>>> scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) >>>>>>>> at >>>>>>>> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.pollAndExecAll(ForkJoinPool.java:1253) >>>>>>>> at >>>>>>>> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1346) >>>>>>>> at >>>>>>>> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) >>>>>>>> at >>>>>>>> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) >>>>>>>> 16:35:46,767 INFO org.apache.flink.runtime.taskmanager.Task >>>>>>>> - Triggering cancellation of task code CHAIN GroupReduce >>>>>>>> (GroupReduce at compactDataSources(MyClass.java:213)) -> >>>>>>>> Combine(Distinct >>>>>>>> at compactDataSources(MyClass.java:213)) (8/36) >>>>>>>> (57a0ad78726d5ba7255aa87038250c51). >>>>>>>> >>>>>>>> The job instead runs correctly from the IDE (Eclipse). How can I >>>>>>>> understand/debug what's wrong? >>>>>>>> >>>>>>>> Best, >>>>>>>> Flavio >>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>> >>
