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https://issues.apache.org/jira/browse/RIVER-403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13203366#comment-13203366
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Peter Firmstone commented on RIVER-403:
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The fix for this issue was committed in svn revision #1231478
It was accidentally recorded against River-142
> DGC leaks threads
> -----------------
>
> Key: RIVER-403
> URL: https://issues.apache.org/jira/browse/RIVER-403
> Project: River
> Issue Type: Bug
> Affects Versions: River_2.2.0
> Reporter: bryan thompson
> Labels: DGC, memory_leak
>
> This is from a posting on river-users. The issue is being filed in response
> to that thread.
> I am seeing what would appear to be one DGC thread allocated per exported
> object. This is using River 2.2 and Sun JDK 1.6.0_17. Relevant
> configuration parameters are below.
> I am observing problems with the DGC threads not being retired on a timely
> basis. The exported objects are proxies for Futures which are being executed
> on the service. The code pattern is such that the proxied Future goes out of
> lexical scope quite quickly. E.g., rmiCallReturningProxyForFuture().get().
> Under a modest load, a large number of such Futures are exported which
> results in a large number of long lived DGC threads. This turns into a
> problem for the JVM due to the stack allocation per thread. Presumably this
> is not good for other reasons as well (e.g., scheduling).
> I have tried to override the leaseValue and checkInterval defaults per the
> configuration options below. I suspect that the lease interval is somehow
> not being obeyed, which is presumably a problem on my end. However, I can
> verify that the configuration values are in fact showing up in
> System.getProperties() for at least some of the JVMs involved (the one which
> drives the workload and the one that I am monitoring with the large number of
> DGC lease threads).
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