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Posted to issues@geode.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/02/03 01:40:01 UTC
[jira] [Commented] (GEODE-7739) JMX managers may fail to federate
mbeans for other members
[ https://issues.apache.org/jira/browse/GEODE-7739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17277621#comment-17277621 ]
ASF GitHub Bot commented on GEODE-7739:
---------------------------------------
kirklund closed pull request #5890:
URL: https://github.com/apache/geode/pull/5890
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> JMX managers may fail to federate mbeans for other members
> ----------------------------------------------------------
>
> Key: GEODE-7739
> URL: https://issues.apache.org/jira/browse/GEODE-7739
> Project: Geode
> Issue Type: Bug
> Components: jmx
> Reporter: Kirk Lund
> Assignee: Kirk Lund
> Priority: Major
> Labels: GeodeOperationAPI, pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> JMX Manager may fail to federate one or more MXBeans for other members because of a race condition during startup. When ManagementCacheListener is first constructed, it is in a state that will ignore all callbacks because the field readyForEvents is false.
> ----
> Debugging with JMXMBeanReconnectDUnitTest revealed this bug.
> The test starts two locators with jmx manager configured and started. Locator1 always has all of locator2's mbeans, but locator2 is intermittently missing the personal mbeans of locator1.
> I think this is caused by some sort of race condition in the code that creates the monitoring regions for other members in locator2.
> It's possible that the jmx manager that hits this bug might fail to have mbeans for servers as well as other locators but I haven't seen a test case for this scenario.
> The exposure of this bug means that a user running more than one locator might have a locator that is missing one or more mbeans for the cluster.
> ----
> Studying the JMX code also reveals the existence of *GEODE-8012*.
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