Stopping the JVM process clean up all resources, except temp files. Everything that creates temp files uses a shutdown hook to remove these: IOManager, BlobManager, LibraryCache, ...
On Wed, Sep 2, 2015 at 7:40 PM, Sachin Goel <sachingoel0...@gmail.com> wrote: > I'm not sure what you mean by "Crucial cleanup is in shutdown hooks". > Could you elaborate? > > -- Sachin Goel > Computer Science, IIT Delhi > m. +91-9871457685 > > On Wed, Sep 2, 2015 at 10:25 PM, Stephan Ewen <se...@apache.org> wrote: > >> You can always shut down a cluster manually (via shutdown()) and if the >> JVM simply exists, all is well as well. Crucial cleanup is in shutdown >> hooks. >> >> On Wed, Sep 2, 2015 at 6:22 PM, Till Rohrmann <till.rohrm...@gmail.com> >> wrote: >> >>> If I'm not mistaken, then the cluster should be properly terminated when >>> it gets garbage collected. Thus, also when the main method exits. >>> >>> On Wed, Sep 2, 2015 at 6:14 PM, Sachin Goel <sachingoel0...@gmail.com> >>> wrote: >>> >>>> If I'm right, all Tests use either the MultipleProgramTestBase or >>>> JavaProgramTestBase. Those shut down the cluster explicitly anyway. >>>> I will make sure if this is the case. >>>> >>>> Regards >>>> Sachin >>>> >>>> -- Sachin Goel >>>> Computer Science, IIT Delhi >>>> m. +91-9871457685 >>>> >>>> On Wed, Sep 2, 2015 at 9:40 PM, Till Rohrmann <trohrm...@apache.org> >>>> wrote: >>>> >>>>> Maybe we can create a single PlanExecutor for the LocalEnvironment >>>>> which is used when calling execute. This of course entails that we >>>>> don’t call stop on the LocalCluster. For cases where the program >>>>> exits after calling execute, this should be fine because all resources >>>>> will >>>>> then be released anyway. It might matter for the test execution where >>>>> maven >>>>> reuses the JVMs and where the LocalFlinkMiniCluster won’t be garbage >>>>> collected right away. You could try it out and see what happens. >>>>> >>>>> Cheers, >>>>> Till >>>>> >>>>> >>>>> On Wed, Sep 2, 2015 at 6:03 PM, Till Rohrmann <trohrm...@apache.org> >>>>> wrote: >>>>> >>>>>> 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 <sachingoel0...@gmail.com >>>>>> > 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. +91-9871457685 >>>>>>> >>>>>>> On Wed, Sep 2, 2015 at 9:19 PM, Till Rohrmann <trohrm...@apache.org> >>>>>>> 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 < >>>>>>>> sachingoel0...@gmail.com> 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. +91-9871457685 >>>>>>>>> >>>>>>>>> On Wed, Sep 2, 2015 at 7:59 PM, Stephan Ewen <se...@apache.org> >>>>>>>>> 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 < >>>>>>>>>> sachingoel0...@gmail.com> 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. +91-9871457685 >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >