[
https://issues.apache.org/jira/browse/STORM-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13945769#comment-13945769
]
Patrick Lucas commented on STORM-120:
-------------------------------------
Sure I'll try to come up with a minimal reproducing case. In the mean time I'll
collect some tracebacks. I believe they are almost always the same: an
IndexOutOfBoundsError on the list of downstream tasks in a shufflegrouping, and
the bad index is always the same as the size of the list. (off-by-one)
> util/acquire-random-range-id is not thread-safe
> -----------------------------------------------
>
> Key: STORM-120
> URL: https://issues.apache.org/jira/browse/STORM-120
> Project: Apache Storm (Incubating)
> Issue Type: Bug
> Reporter: James Xu
> Priority: Minor
>
> https://github.com/nathanmarz/storm/issues/724
> Concurrent calls to util/acquire-random-range-id with the same parameters can
> result in an IndexOutOfBoundsException, as an increment in one thread may
> occur after the bounds check in another. The resulting curr value can be >=
> the size of the List state.
> https://github.com/nathanmarz/storm/blob/fc5fbb8b352cf91050cdde4a9f9e77e673ab7f48/storm-core/src/clj/backtype/storm/util.clj#L606
--
This message was sent by Atlassian JIRA
(v6.2#6252)
