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https://issues.apache.org/jira/browse/ASTERIXDB-3346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17812405#comment-17812405
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ASF subversion and git services commented on ASTERIXDB-3346:
------------------------------------------------------------
Commit 1319480d43225deb2d972fc2cce949b28714ec5b in asterixdb's branch
refs/heads/master from Wail Alkowaileet
[ https://gitbox.apache.org/repos/asf?p=asterixdb.git;h=1319480d43 ]
[ASTERIXDB-3346][MTD] Fix GlobalResourceIdFactory race cond.
- user model changes: no
- storage format changes: no
- interface changes: no
Details:
Creating a new ID can wait in indefinitely due to
a race condition (see ASTERIXDB-3346) for more details.
Change-Id: Ic7ff15abbc70277a9f1ae340314335253aa23308
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/18144
Reviewed-by: Wail Alkowaileet <[email protected]>
Reviewed-by: Ali Alsuliman <[email protected]>
Tested-by: Jenkins <[email protected]>
Integration-Tests: Wail Alkowaileet <[email protected]>
> Race condition in GlobalResourceIdFactory
> -----------------------------------------
>
> Key: ASTERIXDB-3346
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-3346
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: MTD - Metadata
> Affects Versions: 0.9.9
> Reporter: Wail Y. Alkowaileet
> Assignee: Wail Y. Alkowaileet
> Priority: Major
> Fix For: 0.9.9
>
>
> In
> [GlobalResourceIdFactory:|https://github.com/apache/asterixdb/blob/30d1fa121c926434504d7c3691338cd28bf5aa0e/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/transaction/GlobalResourceIdFactory.java#L41]
> {noformat}
> // if there already exists a response, use it
> ResourceIdRequestResponseMessage response =
> resourceIdResponseQ.poll();
> if (response == null) {
> requestNewBlock();
> response = resourceIdResponseQ.take();
> } {noformat}
> Two threads say (t1 and t2) can have a race condition:
> t1: do *requestNewBlock();*
> t2: poll the response of the request of t1 ({*}resourceIdResponseQ.poll(){*})
> t1: waits for the response in *resourceIdResponseQ.take()* indefinitely
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