[
https://issues.apache.org/jira/browse/GEODE-8127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17119624#comment-17119624
]
ASF subversion and git services commented on GEODE-8127:
--------------------------------------------------------
Commit 343e114935fad6a78628a57b948cdd08ee0751d9 in geode's branch
refs/heads/develop from John Hutchison
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=343e114 ]
GEODE-8127: Reintroduces changes that account for primary bucket changing
(#5179)
* flaky test ignored
Co-authored-by: john Hutchison <hutchiso...@vmware.com>
Co-authored-by: Jens Deppe <jde...@pivotal.io>
> redis function+delta may not always execute function on primary
> ---------------------------------------------------------------
>
> Key: GEODE-8127
> URL: https://issues.apache.org/jira/browse/GEODE-8127
> Project: Geode
> Issue Type: Bug
> Components: redis
> Reporter: Darrel Schneider
> Assignee: Jens Deppe
> Priority: Major
>
> The redis use of regions depends on the code that will modify the region that
> is storing redis data, to always execute on the primary. It thought it was
> accomplishing this by marking the function as "optimizeForWrite=true" and by
> routing the function to the node with the bucket using "withFilter(key)".
> This works most of the time. But in some cases the function executes on a
> redundant copy. It looks like what is happening is that at the time the
> function is dispatched it has one idea of who the primary is and sends the
> function to that node. But before it executes the primary moves from this
> node to another that is doing redundancy recovery. Then when our function
> finally does a "put" on the localDataSet it ends up being a remote operation
> that is sent to the other node.
> If our redis function could get a lock that prevents the bucket primary
> status from changing (see BucketRegion doLockForPrimary) and then check to
> see if we are the primary (if not throw an exception that causes the function
> sender to retry (see BucketMovedException) otherwise execute the function
> and at the end release the lock (see BucketRegion doUnlockForPrimary).
> We could enable this with a new method added to Function (much like the
> existing isHA and optimizeForWrite). This new method could be
> executeOnPrimary and default to false (adding a default method to the
> Function interface will not cause backwards compatibility issues unless a
> current class that implements Function already had added a method named
> "executeOnPrimary").
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
