MultiThreadedTaskMaster (WorkRunner) memory leak
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Key: DROIDS-46
URL: https://issues.apache.org/jira/browse/DROIDS-46
Project: Droids
Issue Type: Bug
Components: core
Affects Versions: 0.01
Reporter: Mingfai Ma
Priority: Blocker
In a Droids job that has been run for around 6 hours, it eats a lot of memory
that cannot be free by the GC. with "jmap -histo", the report shows there are
1.5m instance of MultiThreadedTaskMaster$WorkerRunner and
LinkedBlockingQueue$Node that consumes 594+475m memory. The instance cannot be
free by any full GC (and they reside in tenured generation of the heap)
num #instances #bytes class name
----------------------------------------------
1: 957740 1007648216 [C
2: 14874175 594967000
org.apache.droids.impl.MultiThreadedTaskMaster$WorkerRunner
3: 14873977 475967264
java.util.concurrent.LinkedBlockingQueue$Node
For #1, I'm not use what's that but that may be a problem with my own program.
But #2 and #3 shall come from Droids. I haven't checked the source of
MultiThreadedTaskMaster yet and it would be great if the original developer
could take a quick look to see if there are any chance that the WorkRunner may
be referenced.
Besides, there is another issue related to MultiThreadedTaskMaster DROIDS-43
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