Hello All, I need to know the range of ports that are being used during the master/slave communication in the Flink cluster. Also is there a way I can specify a range of ports, at the slaves, to restrict them to connect to master only in this range?
Kind Regards, Ravinder Kaur On Wed, Feb 3, 2016 at 10:09 PM, Stephan Ewen <se...@apache.org> wrote: > 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 <neetu0...@gmail.com> 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 <rmetz...@apache.org> >> 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 <neetu0...@gmail.com> >>> 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 <se...@apache.org> 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 <neetu0...@gmail.com> >>>>> 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 <se...@apache.org> >>>>>> wrote: >>>>>> >>>>>>> What do the TaskManger logs say? >>>>>>> >>>>>>> On Wed, Feb 3, 2016 at 6:34 PM, Ravinder Kaur <neetu0...@gmail.com> >>>>>>> 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 <se...@apache.org> >>>>>>>> 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 <neetu0...@gmail.com >>>>>>>>> > 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 >>>>>>>>>> >>>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
