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From Maximilian Michels <...@apache.org>
Subject Re: Application log on Yarn FlinkCluster
Date Mon, 13 Jun 2016 10:13:35 GMT
Hi Theofilos,

Flink doesn't send the local client output to the Yarn cluster. I
think this will only change once we move the entire execution of the
Job to the cluster framework. All output of the actual Flink job
should be within the JobManager or TaskManager logs.

There is something wrong with the network communication if the Client
doesn't return from `runBlocking(..)`. Would be interesting to take a
look at the logs to find out why that could be.


On Sat, Jun 11, 2016 at 1:53 PM, Theofilos Kakantousis <tkak@kth.se> wrote:
> Hi Robert,
> Thanks for the prompt reply. I'm using the IterateExample from Flink
> examples. In the yarn log I get entries for the YarnJobManager and
> ExecutionGraph, but I was wondering if there is a way to push all the
> logging that the client produces into the yarn log. Including the System.out
> calls. Is there a way to modify the example to use a logging framework to
> achieve it?
> Also when I submit the program using the Client runBlocking method, although
> I see in the taskmanager and jobmanager log that the application has
> finished, the runBlocking method does not return. Should I call it in a
> separate thread?
> Cheers,
> Theofilos
> On 2016-06-10 22:12, Robert Metzger wrote:
> Hi Theofilos,
> how exactly are you writing the application output?
> Are you using a logging framework?
> Are you writing the log statements from the open(), map(), invoke() methods
> or from some constructors? (I'm asking since different parts are executed on
> the cluster and locally).
> On Fri, Jun 10, 2016 at 4:00 PM, Theofilos Kakantousis <tkak@kth.se> wrote:
>> Hi all,
>> Flink 1.0.3
>> Hadoop 2.4.0
>> When running a job on a Flink Cluster on Yarn, the application output is
>> not included in the Yarn log. Instead, it is only printed in the stdout from
>> where I run my program.  For the jobmanager, I'm using the log4j.properties
>> file from the flink/conf directory. Yarn log aggregation is enabled and the
>> YarnJobManager log is printed in the yarn log. The application is submitted
>> by a Flink Client to the FlinkYarnCluster using a PackagedProgram.
>> Is this expected behavior and if so, is there a way to include the
>> application output in the Yarn aggregated log? Thanks!
>> Cheers,
>> Theofilos

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