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From Ravinder Kaur <neetu0...@gmail.com>
Subject Re: TaskManager unable to register with JobManager
Date Wed, 10 Feb 2016 12:55:30 GMT
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 <sewen@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 <neetu0404@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 <rmetzger@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 <neetu0404@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 <sewen@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 <neetu0404@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 <sewen@apache.org>
>>>>>> wrote:
>>>>>>
>>>>>>> What do the TaskManger logs say?
>>>>>>>
>>>>>>> On Wed, Feb 3, 2016 at 6:34 PM, Ravinder Kaur <neetu0404@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 <sewen@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 <neetu0404@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
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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