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 >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>>> >> >
