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From "Joe Littlejohn (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CURATOR-105) Memory leak when using service providers
Date Tue, 29 Apr 2014 16:42:15 GMT

     [ https://issues.apache.org/jira/browse/CURATOR-105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joe Littlejohn updated CURATOR-105:
-----------------------------------

    Attachment: ServiceCacheLeakTest.java

Run against a Zookeeper instance with a service registered to see the heap grow. I've been
unable to replicate the same problem when using the TestingServer.

> Memory leak when using service providers
> ----------------------------------------
>
>                 Key: CURATOR-105
>                 URL: https://issues.apache.org/jira/browse/CURATOR-105
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: 2.4.1, 2.4.2
>         Environment: Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
>            Reporter: Joe Littlejohn
>              Labels: discovery
>         Attachments: ServiceCacheLeakTest.java
>
>
> I've observed a memory leak in our production system using Curator service discovery.
> If you run the attached test case and watch the process with jvisualvm you'll see that
the heap grows and grows as the test is running. Taking a heap dump will reveal thousands
of ServiceInstance and ServiceCacheImpl instances that are retained even though the provider
is closed after each usage. The references appear to be traced back to the PathChildrenCache.
This appears to be a leak that shouldn't occur if the provider is correctly closed each time.
> There is also a heap dump available here:
> https://dl.dropboxusercontent.com/u/10909453/heapdump-curator-leak.hprof.tar.gz



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