GitHub user AlexanderShoshin opened a pull request:
https://github.com/apache/zeppelin/pull/2246
[ZEPPELIN-1828] Flaky Test: RemoteInterpreterTest hanged in
zeppelin-interpreter
### What is this PR for?
When `interpreter.close()` occurs in code it shuts down
_RemoteInterpreterEventPoller_ and then tries to close thrift connection. While
closing thrift client will wait until events queue is empty. If
_RemoteInterpreterEventPoller_ has not processed all thrift events before the
shutdown signal comes, thrift client will wait forever. As a result Travis will
terminate the build after code is not responding for 10 minutes.
### What type of PR is it?
[Bug Fix]
### Todos
We need to:
* [ ] - write a test that checks that event queue is empty after
_RemoteInterpreterEventPoller_ is done,
* [ ] - clear unread events on _RemoteInterpreterEventPoller_ shutdown
signal.
### What is the Jira issue?
[ZEPPELIN-1828](https://issues.apache.org/jira/browse/ZEPPELIN-1828)
### How should this be tested?
This issue can be reprodused if you put `Thread.sleep(3000L);` to
_RemoteInterpreterEventPoller.java_
```
...
} else if (event.getType() == RemoteInterpreterEventType.OUTPUT_UPDATE_ALL)
{
Thread.sleep(3000L);
...
}
```
and run _RemoteInterpreterTest.java_.
### Questions:
* Does the licenses files need update? **no**
* Is there breaking changes for older versions? **no**
* Does this needs documentation? **no**
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/AlexanderShoshin/zeppelin ZEPPELIN-1828
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/2246.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2246
----
commit 66fe9c7c480f4dfdb5e7e00eff7198b99e2d3bac
Author: Alexander Shoshin <alexander_shos...@epam.com>
Date: 2017-04-12T08:03:54Z
test that EventPoller clear unread events on shutdown
commit 5818a83d638fdf77f0b6f146f669ad523bb0e10c
Author: Alexander Shoshin <alexander_shos...@epam.com>
Date: 2017-04-12T08:04:31Z
clear unread events on shutdown
----
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