[jira] [Resolved] (STORM-1027) Topology may hang because metric-tick function is a blocking call from spout

["Jungtaek Lim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STORM-1027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jungtaek Lim resolved STORM-1027.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 0.10.0

Thanks [~abhishek.agarwal],
I merged into master and 0.10.x-branch.

> 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
>    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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