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From Flavio Pompermaier <pomperma...@okkam.it>
Subject Re: Flink ProgramDriver
Date Tue, 25 Nov 2014 17:41:55 GMT
Do I have to upload the jar from my application to the Flink Job manager
every time?
Do I have to wait the job to finish? I'd like to start the job execution,
get an id of it and then poll for its status..is that possible?

On Tue, Nov 25, 2014 at 6:04 PM, Robert Metzger <rmetzger@apache.org> wrote:

> Cool.
>
> So you have basically two options:
> a) use the bin/flink run tool.
> This tool is meant for users to submit a job once. To use that, upload the
> jar to any location in the file system (not HDFS).
> use ./bin/flink run <pathToJar> -c classNameOfJobYouWantToRun
> <JobArguments>
> to run the job.
>
> b) use the RemoteExecutor.
> For using the remove Executor, you don't need to put your jar file
> anywhere in your cluster.
> The only thing you need is the jar file somewhere were the Java
> Application can access it.
> Inside this Java Application, you have something like:
>
> runJobOne(ExecutionEnvironment ee) {
>  ee.readFile( ... );
>  ...
>   ee.execute("job 1");
> }
>
> runJobTwo(Exe ..) {
>  ...
> }
>
>
> main() {
>  ExecutionEnvironment  ee = new Remote execution environment ..
>
>  if(something) {
>      runJobOne(ee);
>  } else if(something else) {
>     runJobTwo(ee);
>  } ...
> }
>
>
> The object returned by the ExecutionEnvironment.execute() call also
> contains information about the final status of the program (failed etc.).
>
> I hope that helps.
>
> On Tue, Nov 25, 2014 at 5:30 PM, Flavio Pompermaier <pompermaier@okkam.it>
> wrote:
>
>> See inline
>>
>> On Tue, Nov 25, 2014 at 3:37 PM, Robert Metzger <rmetzger@apache.org>
>> wrote:
>>
>>> Hey,
>>>
>>> maybe we need to go a step back because I did not yet fully understand
>>> what you want to do.
>>>
>>> My understanding so far is the following:
>>> - You have a set of jobs that you've written for Flink
>>>
>>
>> Yes, and they are all in the same jar (that I want to put in the cluster
>> somehow)
>>
>> - You have a cluster with Flink running
>>>
>>
>> Yes!
>>
>>
>>> - You have an external client, which is a Java Application that is
>>> controlling when and how the different jobs are launched. The client is
>>> running basically 24/7 or started by a cronjob.
>>>
>>
>> I have a Java application somewhere that triggers the execution of one of
>> the available jobs in the jar (so I need to pass also the necessary
>> arguments required by each job) and then monitor if the job has been put
>> into a running state and its status (running/failed/finished and percentage
>> would be awesome).
>> I don't think RemoteExecutor is enough..am I wrong?
>>
>>
>>> Correct me if these assumptions are wrong. If they are true, the
>>> RemoteExecutor is probably what you are looking for. Otherwise, we have to
>>> find another solution.
>>>
>>>
>>> On Tue, Nov 25, 2014 at 2:56 PM, Flavio Pompermaier <
>>> pompermaier@okkam.it> wrote:
>>>
>>>> Hi Robert,
>>>> I tried to look at the RemoteExecutor but I can't understand what are
>>>> the exact steps to:
>>>> 1 - (upload if necessary and) register a jar containing multiple main
>>>> methods (one for each job)
>>>> 2 - start the execution of a job from a client
>>>> 3 - monitor the execution of the job
>>>>
>>>> Could you give me the exact java commands/snippets to do that?
>>>>
>>>>
>>>>
>>>> On Sun, Nov 23, 2014 at 8:26 PM, Robert Metzger <rmetzger@apache.org>
>>>> wrote:
>>>>
>>>>> +1 for providing some utilities/tools for application developers.
>>>>> This could include something like an application registry. I also
>>>>> think that almost every user needs something to parse command line
>>>>> arguments (including default values and comprehensive error messages).
>>>>> We should also see if we can document and properly expose the
>>>>> FileSystem abstraction to Flink app programmers. Users sometimes need
to do
>>>>> manipulate files directly.
>>>>>
>>>>>
>>>>> Regarding your second question:
>>>>> For deploying a jar on your cluster, you can use the "bin/flink run
>>>>> <JAR FILE>" command.
>>>>> For starting a Job from an external client you can use the
>>>>> RemoteExecutionEnvironment (you need to know the JobManager address for
>>>>> that). Here is some documentation on that:
>>>>> http://flink.incubator.apache.org/docs/0.7-incubating/cluster_execution.html#remote-environment
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Sat, Nov 22, 2014 at 9:06 PM, Flavio Pompermaier <
>>>>> pompermaier@okkam.it> wrote:
>>>>>
>>>>>> That was exactly what I was looking for. In my case it is not a
>>>>>> problem to use hadoop version because I work on Hadoop. Don't you
think it
>>>>>> could be useful to add a Flink ProgramDriver so that you can use
it both
>>>>>> for hadoop and native-flink jobs?
>>>>>>
>>>>>> Now that I understood how to bundle together a bunch of jobs, my
next
>>>>>> objective will be to deploy the jar on the cluster (similarity to
what tge
>>>>>> webclient does) and then start the jobs from my external client (which
in
>>>>>> theory just need to know the jar name and the parameters to pass
to every
>>>>>> job it wants to call). Do you have an example of that?
>>>>>> On Nov 22, 2014 6:11 PM, "Kostas Tzoumas" <ktzoumas@apache.org>
>>>>>> wrote:
>>>>>>
>>>>>>> Are you looking for something like
>>>>>>> https://hadoop.apache.org/docs/r1.1.1/api/org/apache/hadoop/util/ProgramDriver.html
>>>>>>> ?
>>>>>>>
>>>>>>> You should be able to use the Hadoop ProgramDriver directly,
see for
>>>>>>> example here:
>>>>>>> https://github.com/ktzoumas/incubator-flink/blob/tez_support/flink-addons/flink-tez/src/main/java/org/apache/flink/tez/examples/ExampleDriver.java
>>>>>>>
>>>>>>> If you don't want to introduce a Hadoop dependency in your project,
>>>>>>> you can just copy-paste ProgramDriver, it does not have any dependencies
to
>>>>>>> Hadoop classes. That class just accumulates <String,Class>
pairs
>>>>>>> (simplifying a bit) and calls the main method of the corresponding
class.
>>>>>>>
>>>>>>> On Sat, Nov 22, 2014 at 5:34 PM, Stephan Ewen <sewen@apache.org>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Not sure I get exactly what this is, but packaging multiple
>>>>>>>> examples in one program is well possible. You can have arbitrary
control
>>>>>>>> flow in the main() method.
>>>>>>>>
>>>>>>>> Should be well possible to do something like that hadoop
examples
>>>>>>>> setup...
>>>>>>>>
>>>>>>>> On Fri, Nov 21, 2014 at 7:02 PM, Flavio Pompermaier <
>>>>>>>> pompermaier@okkam.it> wrote:
>>>>>>>>
>>>>>>>>> That was something I used to do with hadoop and it's
comfortable
>>>>>>>>> when testing stuff (so it is not so important).
>>>>>>>>> For an example see what happens when you run the old
"hadoop jar
>>>>>>>>> hadoop-mapreduce-examples.jar" command..it "drives" you
to the correct
>>>>>>>>> invokation of that job.
>>>>>>>>> However, the important thing is that I'd like to keep
existing
>>>>>>>>> related jobs somewhere (like a repository of jobs), deploy
them and then be
>>>>>>>>> able to start the one I need from an external program.
>>>>>>>>>
>>>>>>>>> Could this be done with RemoteExecutor? Or is there any
WS to
>>>>>>>>> manage the job execution? That would be very useful..
>>>>>>>>> Is the Client interface the only one that allow something
similar
>>>>>>>>> right now?
>>>>>>>>>
>>>>>>>>> On Fri, Nov 21, 2014 at 6:19 PM, Stephan Ewen <sewen@apache.org>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> I am not sure exactly what you need there. In Flink
you can write
>>>>>>>>>> more than one program in the same program ;-) You
can define complex flows
>>>>>>>>>> and execute arbitrarily at intermediate points:
>>>>>>>>>>
>>>>>>>>>> main() {
>>>>>>>>>>   ExecutionEnvironment env = ...;
>>>>>>>>>>
>>>>>>>>>>   env.readSomething().map().join(...).and().so().on();
>>>>>>>>>>   env.execute();
>>>>>>>>>>
>>>>>>>>>>   env.readTheNextThing().do()Something();
>>>>>>>>>>   env.execute();
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> You can also just "save" a program and keep it for
later
>>>>>>>>>> execution:
>>>>>>>>>>
>>>>>>>>>> Plan plan = env.createProgramPlan();
>>>>>>>>>>
>>>>>>>>>> at a later point you can start that plan: new
>>>>>>>>>> RemoteExecutor(master, 6123).execute(plan);
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Stephan
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Fri, Nov 21, 2014 at 5:49 PM, Flavio Pompermaier
<
>>>>>>>>>> pompermaier@okkam.it> wrote:
>>>>>>>>>>
>>>>>>>>>>> Any help on this? :(
>>>>>>>>>>>
>>>>>>>>>>> On Fri, Nov 21, 2014 at 9:33 AM, Flavio Pompermaier
<
>>>>>>>>>>> pompermaier@okkam.it> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi guys,
>>>>>>>>>>>> I forgot to ask you if there's a Flink utility
to simulate the
>>>>>>>>>>>> Hadoop ProgramDriver class that acts somehow
like a registry of jobs. Is
>>>>>>>>>>>> there something similar?
>>>>>>>>>>>>
>>>>>>>>>>>> Best,
>>>>>>>>>>>> Flavio
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>
>>>>
>>
>

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