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https://issues.apache.org/jira/browse/GEODE-9736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Darrel Schneider resolved GEODE-9736.
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Fix Version/s: 1.15.0
Resolution: Fixed
> publishes that find no pattern subscribers can cause server to run out of
> memory
> --------------------------------------------------------------------------------
>
> Key: GEODE-9736
> URL: https://issues.apache.org/jira/browse/GEODE-9736
> Project: Geode
> Issue Type: Bug
> Components: redis
> Reporter: Darrel Schneider
> Assignee: Darrel Schneider
> Priority: Major
> Fix For: 1.15.0
>
>
> Currently each time a publish is done the server will check existing pattern
> subscribers to see if they want the publish. If it finds no subscribers it
> remembers that and the publish channel.
> Since you can just keep making up new publish channels that have no memory,
> remembering these can cause the server to run out of memory.
> If you hit this problem you will see an instance of
> PatternSubscriptionManager with a large "patternSubscriptionCache"
> ConcurrentHashMap. It will be full of entries whose value is an instance of
> Collections$EmptyList
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