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Posted to dev@storm.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2015/10/26 08:58:27 UTC
[jira] [Commented] (STORM-1027) Topology may hang because
metric-tick function is a blocking call from spout
[ https://issues.apache.org/jira/browse/STORM-1027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14973877#comment-14973877 ]
ASF GitHub Bot commented on STORM-1027:
---------------------------------------
GitHub user abhishekagarwal87 opened a pull request:
https://github.com/apache/storm/pull/818
Backporting STORM-1027
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/abhishekagarwal87/storm oveflow-buffer
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/storm/pull/818.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 #818
----
commit e696481c164f011e59396ba2c7bb1031db31381d
Author: Abhishek Agarwal <ab...@inmobi.com>
Date: 2015-09-08T11:20:39Z
Backporting STORM-1027
----
> Topology may hang because metric-tick function is a blocking call from spout
> ----------------------------------------------------------------------------
>
> Key: STORM-1027
> URL: https://issues.apache.org/jira/browse/STORM-1027
> Project: Apache Storm
> Issue Type: Bug
> Components: storm-core
> Affects Versions: 0.10.0
> Reporter: Abhishek Agarwal
> Assignee: Abhishek Agarwal
> Priority: Critical
> Fix For: 0.10.0
>
>
> Nathan had fixed the dining philosopher problem by putting a overflow buffer in the spout so that spout is not blocking. However, overflow buffer is not used when emitting the metric, and that could result in the deadlock. I modified the executor to use overflow buffer for emitting metrics and afterwards topology didn't hang.
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