Re: Multiple restarts of Local Cluster

Posted by Till Rohrmann on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Multiple-restarts-of-Local-Cluster-tp2616p2628.html

Oh sorry, then I got the wrong context. I somehow thought it was about test cases because I read `MultipleProgramTestBase` etc. Sorry my bad.

On Wed, Sep 2, 2015 at 6:00 PM, Sachin Goel <[hidden email]> wrote:

I was under the impression that the @AfterClass annotation can only be used in test classes.

Even so, the idea is that a user program running in the IDE should not be starting up the cluster several times [my primary concern is the addition of the persist operator], and we certainly cannot ask the user to terminate the cluster after execution, while in local mode. 

-- Sachin Goel

Computer Science, IIT Delhi

m. <a href="tel:%2B91-9871457685" value="[phone]" target="_blank">[phone]

On Wed, Sep 2, 2015 at 9:19 PM, Till Rohrmann <[hidden email]> wrote:

Why is it not possible to shut down the local cluster? Can’t you shut it down in the @AfterClass method?

​

On Wed, Sep 2, 2015 at 4:56 PM, Sachin Goel <[hidden email]> wrote:

Yes. That will work too. However, then it isn't possible to shut down the local cluster. [Is it necessary to do so or does it shut down automatically when the program exists? I'm not entirely sure.]

-- Sachin Goel

Computer Science, IIT Delhi

m. <a href="tel:%2B91-9871457685" value="[phone]" target="_blank">[phone]

On Wed, Sep 2, 2015 at 7:59 PM, Stephan Ewen <[hidden email]> wrote:

Have a look at some other tests, like the checkpointing tests. They start one cluster manually and keep it running. They connect against it using the remote environment ("localhost", miniCluster.getJobManagerRpcPort()).

That works nicely...

On Wed, Sep 2, 2015 at 4:23 PM, Sachin Goel <[hidden email]> wrote:

Hi all

While using LocalEnvironment, in case the program triggers execution several times, the {{LocalFlinkMiniCluster}} is started as many times. This can consume a lot of time in setting up and tearing down the cluster. Further, this hinders with a new functionality I'm working on based on persisted results.

One potential solution could be to follow the methodology in `MultipleProgramsTestBase`. The user code then would have to reside in a fixed function name, instead of the main method. Or is that too cumbersome?

Regards

Sachin

-- Sachin Goel

Computer Science, IIT Delhi

m. <a href="tel:%2B91-9871457685" value="[phone]" target="_blank">[phone]