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

["Erik Weathers (JIRA)" <ji...@apache.org>]

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

Erik Weathers updated STORM-1027:
---------------------------------
    Affects Version/s: 0.9.5
        Fix Version/s: 0.9.6

> 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, 0.9.5
>            Reporter: Abhishek Agarwal
>            Assignee: Abhishek Agarwal
>            Priority: Critical
>             Fix For: 0.10.0, 0.9.6
>
>
> 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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