[
https://issues.apache.org/jira/browse/AMQ-5269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14057830#comment-14057830
]
ASF GitHub Bot commented on AMQ-5269:
-------------------------------------
GitHub user dkulp opened a pull request:
https://github.com/apache/activemq/pull/33
[AMQ-5269] Update NIO based transports to use a Select mechanism
Update NIO based transports to use a Select mechanism for the accepts
instead of the blocking select.
Cuts about 10 minutes off the activemq-stomp tests, drops the NIO test
execution time down to equal to the non-NIO based tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dkulp/activemq AMQ-5269
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/activemq/pull/33.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 #33
----
commit 52ef9745d9bafbeab940ed4937c014be3abc9655
Author: Daniel Kulp <[email protected]>
Date: 2014-07-10T14:57:44Z
[AMQ-5269] Update NIO based transports to use a Select mechanism for the
accepts instead of the blocking select.
Cuts about 10 minutes off the activemq-stomp tests, drops the NIO test
execution time down to equal to the non-NIO based tests.
----
> NIO transports using blocking accept calls, very slow shutdown
> --------------------------------------------------------------
>
> Key: AMQ-5269
> URL: https://issues.apache.org/jira/browse/AMQ-5269
> Project: ActiveMQ
> Issue Type: Bug
> Components: Transport
> Affects Versions: 5.10.0
> Reporter: Daniel Kulp
> Assignee: Daniel Kulp
> Attachments: AMQ-5269.patch
>
>
> Currently, all the TCP based transports are using the old blocking style of
> socket.accept() to accept connections. This works "OK" except that for
> sockets that have a channel associated with them, the socket.close() doesn't
> cause it to return immediately. It still waits for the SoTimeout which is
> currently set a 2 seconds. That can cause 2 second delays for any shutdown
> which causes long, unnecessary delays, particularly in the tests.
> One possible "fix" is to drop the socket.setSoTimeout(2000) call to something
> much smaller. However, that would turn the accept thread into a more "busy
> wait" scenario which is undesirable.
> A better fix is to change the accepts for the sockets that have a
> ServerSocketChannel to use the NIO based selectors for the accept operations.
> The selector.disable()/selector.close() allows the socket and everything to
> close immediately. The result is that the NIO based tests now take the same
> amount of time as the non-NIO based tests (for which socket.close() causes
> the accept to return immediately).
> Pull request forthcoming.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
