Can machines connect to port 6123? The firewall may block that port, put permit SSH.
On Wed, Feb 3, 2016 at 9:52 PM, Ravinder Kaur <[email protected]> wrote: > Hello, > > Here is the log file of Jobmanager. I did not see some thing suspicious > and as it suggests the ports are also listening. > > 20:58:46,906 INFO org.apache.flink.runtime.jobmanager.JobManager > - Starting JobManager on IP-of-master:6123 with execution mode > CLUSTER and streaming mode BATCH_ONLY > 20:58:46,978 INFO org.apache.flink.runtime.jobmanager.JobManager > - Security is not enabled. Starting non-authenticated JobManager. > 20:58:46,979 INFO org.apache.flink.runtime.jobmanager.JobManager > - Starting JobManager > 20:58:46,980 INFO org.apache.flink.runtime.jobmanager.JobManager > - Starting JobManager actor system at 10.155.208.138:6123 > 20:58:48,196 INFO akka.event.slf4j.Slf4jLogger > - Slf4jLogger started > 20:58:48,295 INFO Remoting > - Starting remoting > 20:58:48,541 INFO Remoting > - Remoting started; listening on addresses > :[akka.tcp://flink@IP-of-master:6123] > 20:58:48,549 INFO org.apache.flink.runtime.jobmanager.JobManager > - Starting JobManger web frontend > 20:58:48,690 INFO org.apache.flink.runtime.webmonitor.WebRuntimeMonitor > - Using directory /tmp/flink-web-876a4755-4f38-4ff7-8202-f263afa9b986 > for the web interface files > 20:58:48,691 INFO org.apache.flink.runtime.webmonitor.WebRuntimeMonitor > - Serving job manager log from > /home/flink/flink-0.10.1/log/flink-flink-jobmanager-0-hostname.log > 20:58:48,691 INFO org.apache.flink.runtime.webmonitor.WebRuntimeMonitor > - Serving job manager stdout from > /home/flink/flink-0.10.1/log/flink-flink-jobmanager-0-hostname.out > 20:58:49,044 INFO org.apache.flink.runtime.webmonitor.WebRuntimeMonitor > - Web frontend listening at 0:0:0:0:0:0:0:0:8081 > 20:58:49,045 INFO org.apache.flink.runtime.jobmanager.JobManager > - Starting JobManager actor > 20:58:49,052 INFO org.apache.flink.runtime.blob.BlobServer > - Created BLOB server storage directory > /tmp/blobStore-e0c52bfb-2411-4a83-ac8d-5664a5894258 > 20:58:49,054 INFO org.apache.flink.runtime.blob.BlobServer > - Started BLOB server at 0.0.0.0:43683 - max concurrent requests: > 50 - max backlog: 1000 > 20:58:49,075 INFO org.apache.flink.runtime.jobmanager.MemoryArchivist > - Started memory archivist akka://flink/user/archive > 20:58:49,075 INFO org.apache.flink.runtime.jobmanager.JobManager > - Starting JobManager at akka.tcp://flink@IP-of-master > :6123/user/jobmanager. > 20:58:49,081 INFO org.apache.flink.runtime.jobmanager.JobManager > - JobManager akka.tcp://flink@IP-of-master:6123/user/jobmanager > was granted leadership with leader session ID None. > 20:58:49,082 INFO org.apache.flink.runtime.webmonitor.WebRuntimeMonitor > - Starting with JobManager > akka.tcp://flink@IP-of-master:6123/user/jobmanager > on port 8081 > 20:58:49,083 INFO org.apache.flink.runtime.webmonitor.JobManagerRetriever > - New leader reachable under akka.tcp://flink@IP-of-master > :6123/user/jobmanager:null. > 20:59:22,794 INFO org.apache.flink.runtime.jobmanager.JobManager > - Submitting job 72733d69588678ec224003ab5577cab8 (Flink Java Job at > Wed Feb 03 20:59:22 CET 2016). > 20:59:22,853 INFO org.apache.flink.runtime.jobmanager.JobManager > - Scheduling job 72733d69588678ec224003ab5577cab8 (Flink Java Job at > Wed Feb 03 20:59:22 CET 2016). > 20:59:22,857 INFO org.apache.flink.runtime.jobmanager.JobManager > - Status of job 72733d69588678ec224003ab5577cab8 (Flink Java Job at > Wed Feb 03 20:59:22 CET 2016) changed to RUNNING. > 20:59:22,859 INFO org.apache.flink.runtime.executiongraph.ExecutionGraph > - CHAIN DataSource (at > getDefaultTextLineDataSet(WordCountData.java:70) > (org.apache.flink.api.java.io.CollectionInputFormat)) -> FlatMap (FlatMap > at main(WordCount.java:69)) -> Combine(SUM(1), at main(WordCount.java:72) > (1/1) (23fb37019a504fd6c7bf95e46a8cd7a3) switched from CREATED to SCHEDULED > 20:59:22,881 INFO org.apache.flink.runtime.executiongraph.ExecutionGraph > - CHAIN DataSource (at > getDefaultTextLineDataSet(WordCountData.java:70) > (org.apache.flink.api.java.io.CollectionInputFormat)) -> FlatMap (FlatMap > at main(WordCount.java:69)) -> Combine(SUM(1), at main(WordCount.java:72) > (1/1) (23fb37019a504fd6c7bf95e46a8cd7a3) switched from SCHEDULED to CANCELED > 20:59:22,881 INFO org.apache.flink.runtime.jobmanager.JobManager > - Status of job 72733d69588678ec224003ab5577cab8 (Flink Java Job at > Wed Feb 03 20:59:22 CET 2016) changed to FAILING. > org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: > Not enough free slots available to run the job. You can decrease the > operator parallelism or increase the number of slots per TaskManager in the > configuration. Task to schedule: < Attempt #0 (CHAIN DataSource (at > getDefaultTextLineDataSet(WordCountData.java:70) > (org.apache.flink.api.java.io.CollectionInputFormat)) -> FlatMap (FlatMap > at main(WordCount.java:69)) -> Combine(SUM(1), at main(WordCount.java:72) > (1/1)) @ (unassigned) - [SCHEDULED] > with groupID < > 31e497f2f68c9cee5864c8fddaff3d59 > in sharing group < SlotSharingGroup > [f9ed1aab933e061a8ce1ecaa3534f18c, 037bb78a1902f7edea69a978ad7b54ce, > 31e497f2f68c9cee5864c8fddaff3d59] >. Resources available to scheduler: > Number of instances=0, total number of slots=0, available slots=0 > at > org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleTask(Scheduler.java:256) > at > org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleImmediately(Scheduler.java:131) > at > org.apache.flink.runtime.executiongraph.Execution.scheduleForExecution(Execution.java:298) > at > org.apache.flink.runtime.executiongraph.ExecutionVertex.scheduleForExecution(ExecutionVertex.java:458) > at > org.apache.flink.runtime.executiongraph.ExecutionJobVertex.scheduleAll(ExecutionJobVertex.java:322) > at > org.apache.flink.runtime.executiongraph.ExecutionGraph.scheduleForExecution(ExecutionGraph.java:679) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$submitJob$1.apply$mcV$sp(JobManager.scala:982) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$submitJob$1.apply(JobManager.scala:962) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$submitJob$1.apply(JobManager.scala:962) > at > scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) > at > scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) > at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41) > at > akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401) > at > scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) > at > scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) > at > scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) > at > scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) > 20:59:22,886 INFO org.apache.flink.runtime.executiongraph.ExecutionGraph > - CHAIN Reduce (SUM(1), at main(WordCount.java:72) -> FlatMap > (collect()) (1/1) (824b6e3771304cd0f92aea4ab763a11d) switched from CREATED > to CANCELED > 20:59:22,887 INFO org.apache.flink.runtime.executiongraph.ExecutionGraph > - DataSink (collect() sink) (1/1) (1bb64a2edc6f68ad716acd9f8d2d7d67) > switched from CREATED to CANCELED > 20:59:22,890 INFO org.apache.flink.runtime.jobmanager.JobManager > - Status of job 72733d69588678ec224003ab5577cab8 (Flink Java Job at > Wed Feb 03 20:59:22 CET 2016) changed to FAILED. > org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: > Not enough free slots available to run the job. You can decrease the > operator parallelism or increase the number of slots per TaskManager in the > configuration. Task to schedule: < Attempt #0 (CHAIN DataSource (at > getDefaultTextLineDataSet(WordCountData.java:70) > (org.apache.flink.api.java.io.CollectionInputFormat)) -> FlatMap (FlatMap > at main(WordCount.java:69)) -> Combine(SUM(1), at main(WordCount.java:72) > (1/1)) @ (unassigned) - [SCHEDULED] > with groupID < > 31e497f2f68c9cee5864c8fddaff3d59 > in sharing group < SlotSharingGroup > [f9ed1aab933e061a8ce1ecaa3534f18c, 037bb78a1902f7edea69a978ad7b54ce, > 31e497f2f68c9cee5864c8fddaff3d59] >. Resources available to scheduler: > Number of instances=0, total number of slots=0, available slots=0 > at > org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleTask(Scheduler.java:256) > at > org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleImmediately(Scheduler.java:131) > at > org.apache.flink.runtime.executiongraph.Execution.scheduleForExecution(Execution.java:298) > at > org.apache.flink.runtime.executiongraph.ExecutionVertex.scheduleForExecution(ExecutionVertex.java:458) > at > org.apache.flink.runtime.executiongraph.ExecutionJobVertex.scheduleAll(ExecutionJobVertex.java:322) > at > org.apache.flink.runtime.executiongraph.ExecutionGraph.scheduleForExecution(ExecutionGraph.java:679) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$submitJob$1.apply$mcV$sp(JobManager.scala:982) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$submitJob$1.apply(JobManager.scala:962) > at > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$submitJob$1.apply(JobManager.scala:962) > at > scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) > at > scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) > > > On Wed, Feb 3, 2016 at 9:27 PM, Robert Metzger <[email protected]> > wrote: > >> Hi, >> >> the TaskManager is starting up, but its not able to register at the job >> manager. Did you check the JobManager log? Do you see anything suspicious >> there? Are the ports matching? >> >> >> On Wed, Feb 3, 2016 at 9:23 PM, Ravinder Kaur <[email protected]> >> wrote: >> >>> Hello, >>> >>> Thank you for pointing it out. I had a little typo while I edited the >>> hostname in flink-conf.yaml. I've reset it and the TaskManager started up. >>> But I still can't run the WordCount example and it throws the same >>> NoResourceAvaliableException. >>> >>> Caused by: >>> org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableExce >>> >>> ption: Not enough free slots available to run the job. You can >>> decrease the oper >>> ator parallelism or increase the number of >>> slots per TaskManager in the configur >>> ation. Task to schedule: < >>> Attempt #0 (CHAIN DataSource (at getDefaultTextLineDa >>> >>> taSet(WordCountData.java:70) >>> (org.apache.flink.api.java.io.CollectionInputFormat >>> )) -> >>> FlatMap (FlatMap at main(WordCount.java:69)) -> Combine(SUM(1), at main(Wo >>> >>> rdCount.java:72) (1/1)) @ (unassigned) - [SCHEDULED] > with >>> groupID < 31e497f2f6 >>> 8c9cee5864c8fddaff3d59 > in sharing group >>> < SlotSharingGroup [f9ed1aab933e061a8c >>> e1ecaa3534f18c, >>> 037bb78a1902f7edea69a978ad7b54ce, 31e497f2f68c9cee5864c8fddaff3d >>> >>> 59] >. Resources available to scheduler: Number of instances=0, total >>> number of >>> slots=0, available slots=0 >>> at >>> org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleTask( >>> >>> Scheduler.java:256) >>> at >>> org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleImmed >>> >>> iately(Scheduler.java:131) >>> at >>> org.apache.flink.runtime.executiongraph.Execution.scheduleForExecutio >>> >>> n(Execution.java:298) >>> at >>> org.apache.flink.runtime.executiongraph.ExecutionVertex.scheduleForEx >>> >>> ecution(ExecutionVertex.java:458) >>> at >>> org.apache.flink.runtime.executiongraph.ExecutionJobVertex.scheduleAl >>> >>> l(ExecutionJobVertex.java:322) >>> at >>> org.apache.flink.runtime.executiongraph.ExecutionGraph.scheduleForExe >>> >>> cution(ExecutionGraph.java:679) >>> at >>> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$fl >>> >>> >>> >>> ink$runtime$jobmanager$JobManager$$submitJob$1.apply$mcV$sp(JobManager.scala:982 >>> >>> ) >>> at >>> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$fl >>> >>> >>> ink$runtime$jobmanager$JobManager$$submitJob$1.apply(JobManager.scala:962) >>> at >>> org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$fl >>> >>> >>> ink$runtime$jobmanager$JobManager$$submitJob$1.apply(JobManager.scala:962) >>> ... 8 more >>> >>> The log of TaskManager again has the same errors as before. >>> >>> 20:58:58,457 INFO org.apache.flink.runtime.net.ConnectionUtils >>> - Failed to connect from address '/slave-IP': connect timed out >>> 20:58:58,458 INFO org.apache.flink.runtime.net.ConnectionUtils >>> - Failed to connect from address '/0:0:0:0:0:0:0:1%1': Network is >>> unreachable >>> 20:58:58,458 INFO org.apache.flink.runtime.net.ConnectionUtils >>> - Failed to connect from address '/127.0.0.1': Invalid argument >>> 20:58:59,048 WARN org.apache.flink.runtime.net.ConnectionUtils >>> - Could not connect to /master-IP:6123. Selecting a local address >>> using heuristics. >>> 20:58:59,050 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - TaskManager will use hostname/address 'hostname-of-slave' >>> (slave-IP) for communication. >>> 20:58:59,051 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Starting TaskManager in streaming mode BATCH_ONLY >>> 20:58:59,052 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Starting TaskManager actor system at slave_IP:0 >>> 20:58:59,776 INFO akka.event.slf4j.Slf4jLogger >>> - Slf4jLogger started >>> 20:58:59,842 INFO Remoting >>> - Starting remoting >>> 20:59:00,094 INFO Remoting >>> - Remoting started; listening on addresses >>> :[akka.tcp://flink@slave-IP:33813] >>> 20:59:00,100 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Starting TaskManager actor >>> 20:59:00,125 INFO org.apache.flink.runtime.io.network.netty.NettyConfig >>> - NettyConfig [server address: hostname-of-master/master-IP, server >>> port: 49030, memory segment size (bytes): 32768, transport type: NIO, >>> number of server threads: 0 (use Netty's default), number of client >>> threads: 0 (use Netty's default), server connect backlog: 0 (use Netty's >>> default), client connect timeout (sec): 120, send/receive buffer size >>> (bytes): 0 (use Netty's default)] >>> 20:59:00,131 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Messages between TaskManager and JobManager have a max timeout >>> of 100000 milliseconds >>> 20:59:00,142 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Temporary file directory '/tmp': total 4 GB, usable 1 GB (25.00% >>> usable) >>> 20:59:00,210 INFO >>> org.apache.flink.runtime.io.network.buffer.NetworkBufferPool - Allocated >>> 64 MB for network buffer pool (number of memory segments: 2048, bytes per >>> segment: 32768). >>> 20:59:00,323 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Using 0.7 of the currently free heap space for Flink managed >>> heap memory (293 MB). >>> 20:59:00,565 INFO org.apache.flink.runtime.io.disk.iomanager.IOManager >>> - I/O manager uses directory >>> /tmp/flink-io-c7796b82-6676-4604-97fd-df09001a84e8 for spill files. >>> 20:59:00,578 INFO org.apache.flink.runtime.filecache.FileCache >>> - User file cache uses directory >>> /tmp/flink-dist-cache-13ed3e76-cf1e-46fa-9ba2-5177e801429e >>> 20:59:00,908 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Starting TaskManager actor at >>> akka://flink/user/taskmanager#-157676733. >>> 20:59:00,908 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - TaskManager data connection information: hostname-of-master >>> (dataPort=49030) >>> 20:59:00,909 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - TaskManager has 1 task slot(s). >>> 20:59:00,910 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Memory usage stats: [HEAP: 376/491/491 MB, NON HEAP: 24/49/304 >>> MB (used/committed/max)] >>> 20:59:00,917 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Trying to register at JobManager >>> akka.tcp://flink@master-IP:6123/user/jobmanager >>> (attempt 1, timeout: 500 milliseconds) >>> 20:59:01,443 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Trying to register at JobManager >>> akka.tcp://flink@master-IP:6123/user/jobmanager >>> (attempt 2, timeout: 1000 milliseconds) >>> 20:59:02,873 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Trying to register at JobManager >>> akka.tcp://flink@master-IP:6123/user/jobmanager >>> (attempt 3, timeout: 2000 milliseconds) >>> 20:59:04,893 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Trying to register at JobManager >>> akka.tcp://flink@master-IP:6123/user/jobmanager >>> (attempt 4, timeout: 4000 milliseconds) >>> 20:59:08,914 INFO org.apache.flink.runtime.taskmanager.TaskManager >>> - Trying to register at JobManager >>> akka.tcp://flink@master-IP:6123/user/jobmanager >>> (attempt 5, timeout: 8000 milliseconds) >>> >>> >>> Kind Regards, >>> Ravinder Kaur >>> >>> On Wed, Feb 3, 2016 at 8:12 PM, Stephan Ewen <[email protected]> wrote: >>> >>>> This looks like the reason: >>>> >>>> java.net.UnknownHostException: Cannot resolve the JobManager hostname >>>> 'hostname-of-master' specified in the configuration >>>> >>>> On Wed, Feb 3, 2016 at 7:29 PM, Ravinder Kaur <[email protected]> >>>> wrote: >>>> >>>>> Hello, >>>>> >>>>> The log file of the Taskmanager now shows the following >>>>> >>>>> 18:27:10,082 WARN org.apache.hadoop.util.NativeCodeLoader >>>>> - Unable to load native-hadoop library for your platform... >>>>> using >>>>> builtin-java classes where applicable >>>>> 18:27:10,244 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - >>>>> -------------------------------------------------------------------------------- >>>>> 18:27:10,244 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Starting TaskManager (Version: 0.10.1, Rev:2e9b231, >>>>> Date:22.11.2015 @ 12:41:12 CET) >>>>> 18:27:10,244 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Current user: flink >>>>> 18:27:10,245 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - JVM: OpenJDK 64-Bit Server VM - Oracle Corporation - >>>>> 1.7/24.91-b01 >>>>> 18:27:10,245 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Maximum heap size: 491 MiBytes >>>>> 18:27:10,245 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - JAVA_HOME: /usr/lib/jvm/java-1.7.0-openjdk-amd64 >>>>> 18:27:10,247 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Hadoop version: 2.7.0 >>>>> 18:27:10,247 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - JVM Options: >>>>> 18:27:10,247 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - -Xms512M >>>>> 18:27:10,247 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - -Xmx512M >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - -XX:MaxDirectMemorySize=8388607T >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - -XX:MaxPermSize=256m >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - >>>>> -Dlog.file=/home/flink/flink-0.10.1/log/flink-flink-taskmanager-0-vm-10-155-208-137.cloud.mwn.de.log >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - >>>>> -Dlog4j.configuration=file:/home/flink/flink-0.10.1/conf/log4j.properties >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - >>>>> -Dlogback.configurationFile=file:/home/flink/flink-0.10.1/conf/logback.xml >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Program Arguments: >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - --configDir >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - /home/flink/flink-0.10.1/conf >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - --streamingMode >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - batch >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Classpath: >>>>> /home/flink/flink-0.10.1/lib/flink-dist_2.11-0.10.1.jar:/home/flink/flink-0.10.1/lib/flink-python_2.11-0.10.1.jar:/home/flink/flink-0.10.1/lib/log4j-1.2.17.jar:/home/flink/flink-0.10.1/lib/slf4j-log4j12-1.7.7.jar:/usr/lib/jvm/java-1.7.0-openjdk-amd64/lib/tools.jar:: >>>>> 18:27:10,248 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - >>>>> -------------------------------------------------------------------------------- >>>>> 18:27:10,252 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Maximum number of open file descriptors is 4096 >>>>> 18:27:10,277 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Loading configuration from /home/flink/flink-0.10.1/conf >>>>> 18:27:10,356 INFO org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Security is not enabled. Starting non-authenticated >>>>> TaskManager. >>>>> 18:27:10,365 ERROR org.apache.flink.runtime.taskmanager.TaskManager >>>>> - Failed to run TaskManager. >>>>> java.net.UnknownHostException: Cannot resolve the JobManager hostname >>>>> 'hostname-of-master' specified in the configuration >>>>> at >>>>> org.apache.flink.runtime.util.StandaloneUtils.createLeaderRetrievalService(StandaloneUtils.java:79) >>>>> at >>>>> org.apache.flink.runtime.util.StandaloneUtils.createLeaderRetrievalService(StandaloneUtils.java:48) >>>>> at >>>>> org.apache.flink.runtime.util.LeaderRetrievalUtils.createLeaderRetrievalService(LeaderRetrievalUtils.java:69) >>>>> at >>>>> org.apache.flink.runtime.taskmanager.TaskManager$.selectNetworkInterfaceAndPort(TaskManager.scala:1351) >>>>> at >>>>> org.apache.flink.runtime.taskmanager.TaskManager$.selectNetworkInterfaceAndRunTaskManager(TaskManager.scala:1328) >>>>> at >>>>> org.apache.flink.runtime.taskmanager.TaskManager$.main(TaskManager.scala:1240) >>>>> at >>>>> org.apache.flink.runtime.taskmanager.TaskManager.main(TaskManager.scala) >>>>> >>>>> Kind Regards, >>>>> Ravinder Kaur >>>>> >>>>> On Wed, Feb 3, 2016 at 7:19 PM, Stephan Ewen <[email protected]> wrote: >>>>> >>>>>> What do the TaskManger logs say? >>>>>> >>>>>> On Wed, Feb 3, 2016 at 6:34 PM, Ravinder Kaur <[email protected]> >>>>>> wrote: >>>>>> >>>>>>> Hello, >>>>>>> >>>>>>> Thanks for the quick reply. I tried to set jobmanager.rpc.address in >>>>>>> flink-conf.yaml to the hostname of master node on both the nodes. >>>>>>> >>>>>>> Now it does not start the Taskmanager at the worker node at all. >>>>>>> When I start the cluster using ./bin/start-cluster.sh on master it shows >>>>>>> the normal output of starting the Jobmanager and Taskmanager but when I >>>>>>> run >>>>>>> jps on the nodes the slave does not have the Taskmanager running. >>>>>>> >>>>>>> Running the WordCount example again fails showing the same error. >>>>>>> Stopping the cluster says no taskmanager to stop. >>>>>>> >>>>>>> Kind Regards, >>>>>>> Ravinder Kaur >>>>>>> >>>>>>> On Wed, Feb 3, 2016 at 5:47 PM, Stephan Ewen <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> Looks like the network configuration is not correct. >>>>>>>> >>>>>>>> I would try setting the full host name (like "master.abc.xyz.com") >>>>>>>> as jobmanager.rpc.address. >>>>>>>> >>>>>>>> Greetings, >>>>>>>> Stephan >>>>>>>> >>>>>>>> >>>>>>>> On Wed, Feb 3, 2016 at 5:43 PM, Ravinder Kaur <[email protected]> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> >>>>>>>>> Hello Community, >>>>>>>>> >>>>>>>>> I'm a student and new to Apache Flink. I'm trying to learn and >>>>>>>>> have setup a 2- node standalone Flink(0.10.1) cluster (one master and >>>>>>>>> one >>>>>>>>> worker). I'm facing the following issue. >>>>>>>>> >>>>>>>>> Cluster: consists of 2 vms (one master and one worker) >>>>>>>>> >>>>>>>>> The configurations are done as per >>>>>>>>> https://ci.apache.org/projects/flink/flink-docs-release-0.10/setup/cluster_setup.html >>>>>>>>> >>>>>>>>> When I start the cluster both the JobManager and the TaskManager >>>>>>>>> are started on the master and worker respectively. >>>>>>>>> >>>>>>>>> Command to start the cluster : bin/start-cluster.sh >>>>>>>>> >>>>>>>>> JPS shows all the processes running. >>>>>>>>> >>>>>>>>> Then I run the following command to run a WordCount example job: >>>>>>>>> ./bin/flink >>>>>>>>> run ./examples/WordCount.jar >>>>>>>>> >>>>>>>>> the result is attached with the mail. >>>>>>>>> >>>>>>>>> The error is >>>>>>>>> org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailabeException: >>>>>>>>> Not enough free slots available to run to run the job >>>>>>>>> ....................... Resources available to scheduler: Number of >>>>>>>>> instances=0, total number of slots= 0, available slots=0 >>>>>>>>> >>>>>>>>> Therefore I suppose that the JobManager does not find the >>>>>>>>> TaskManager and checked the logs of the TaskManager which indeed >>>>>>>>> shows that >>>>>>>>> the TaskManager is unable to register at the JobManager for quite a >>>>>>>>> long >>>>>>>>> time. There are org.apache.flink.runtime.net.ConnectionUtils: >>>>>>>>> Failed to connect from localhost: Connect timed out and >>>>>>>>> org.apache.flink.runtime.net.ConnectionUtils: >>>>>>>>> Failed to connect from address localhost: Network is Unreachable >>>>>>>>> messages >>>>>>>>> in the log of the TaskManager. Later when it starts up after a number >>>>>>>>> of >>>>>>>>> attempts and tries to register at the JobManager, which also fails >>>>>>>>> after a >>>>>>>>> lot of attempts showing the following message >>>>>>>>> org.apache.flink.runtime.taskmanager.Taskmanager: >>>>>>>>> Trying to register at JobManager >>>>>>>>> akka.tcp://flink@master:6123/user'/jobmanager >>>>>>>>> (attempt:92, timeout:30seconds) and >>>>>>>>> org.apache.flink.runtime.taskmanager.Taskmanager: >>>>>>>>> Tried to associate with unreachable remote host >>>>>>>>> [akka.tcp://flink@master:6123/user/jobmanager]. >>>>>>>>> Address is now gated for 5000ms, all messages to this address will be >>>>>>>>> delivered to dead letters. Reason: Connection timed out: /master:6123 >>>>>>>>> >>>>>>>>> I browsed the internet for these and found >>>>>>>>> >>>>>>>>> http://stackoverflow.com/questions/33601020/flink-job-wont-run-with-higher-taskmanager-heap-mb >>>>>>>>> <http://stackoverflow.com/questions/33601020/flink-job-wont-run-with-higher-taskmanager-heap-mb> >>>>>>>>> and https://issues.apache.org/jira/browse/FLINK-1119 these links >>>>>>>>> helpful. Stephan Ewen the guy who provided the solution in both the >>>>>>>>> links >>>>>>>>> gives a good explanation that the TaskManagers take quite some time to >>>>>>>>> register at the JobManager and therefore I waited for as long as 20 >>>>>>>>> mins >>>>>>>>> after starting the cluster to run the job. But even after waiting so >>>>>>>>> long I >>>>>>>>> get the same error. >>>>>>>>> >>>>>>>>> Another suggestion was to run the cluster in streaming mode. So I >>>>>>>>> tried it with the command : bin/start-cluster-streaming.sh and >>>>>>>>> ran the job but I get the same error. I have rechecked all the >>>>>>>>> configurations but I'm unable to find out the fault. >>>>>>>>> >>>>>>>>> I re-checked all the configurations but could not find anything >>>>>>>>> wrong. Also checked the port 6123 on master which is in LISTEN state >>>>>>>>> and >>>>>>>>> tcp request from worker to master shows SYN_SENT state using netstat >>>>>>>>> -na >>>>>>>>> and lsof -i commands. >>>>>>>>> >>>>>>>>> I opened the webpage on master http://localhost:8081 but it shows >>>>>>>>> nothing and localhost:8080 says connection refused. >>>>>>>>> >>>>>>>>> Kindly help me out as it is very important for me. Let me know if >>>>>>>>> you have any questions. >>>>>>>>> >>>>>>>>> Kind Regards, >>>>>>>>> Ravinder Kaur >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
