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From "Vyacheslav Daradur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-5910) Method stopGrid(name) doesn't work in multiJvm mode
Date Thu, 22 Feb 2018 08:55:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-5910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16372547#comment-16372547
] 

Vyacheslav Daradur commented on IGNITE-5910:
--------------------------------------------

I have investigated the issue and found that stopping node in separate JVM may stuck thread
or leave system process alive after test finished.
The main reason is {{StopGridTask}} that we send from node in local JVM to node in separate
JVM via remote computing.
We send job synchronously to be sure that node will be stopped, but job calls synchronously
{{G.stop(igniteInstanceName, cancel))}} with {{cancel = false}}, that means node must wait
to compute jobs before it goes down what leads to some kind of deadlock. Using of {{cancel
= true}} would solve the issue but may break some tests’ logic, for this reason, I've reworked
the method’s synchronization logic.
We have not noticed that before because we use only {{stopAllGrids()}} in out tests which
stop local JVM without waiting for nodes in other JVMs.
I believe this fix should reduce the number of flaky tests on TeamCity, especially which fails
because of a cluster from the previous test has not been stopped properly.

[Ci.tests|https://ci.ignite.apache.org/viewLog.html?buildId=1105939] look a bit better than
in master.

[~dpavlov], could you please review [the prepared PR|https://github.com/apache/ignite/pull/2382]?

> Method stopGrid(name) doesn't work in multiJvm mode
> ---------------------------------------------------
>
>                 Key: IGNITE-5910
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5910
>             Project: Ignite
>          Issue Type: Bug
>    Affects Versions: 2.1
>            Reporter: Vyacheslav Daradur
>            Assignee: Vyacheslav Daradur
>            Priority: Major
>              Labels: MakeTeamcityGreenAgain, tests
>             Fix For: 2.5
>
>
> {code:title=Exception at call}
> java.lang.ClassCastException: org.apache.ignite.testframework.junits.multijvm.IgniteProcessProxy
cannot be cast to org.apache.ignite.internal.IgniteKernal
> {code}
> {code:title=Reproducer snippet}
>     /** {@inheritDoc} */
>     @Override protected boolean isMultiJvm() {
>         return true;
>     }
>     /**
>      * @throws Exception If failed.
>      */
>     public void testGrid() throws Exception {
>         try {
>             startGrid(0);
>             startGrid(1);
>         }
>         finally {
>             stopGrid(1);
>             stopGrid(0);
>         }
>     }
> {code}



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