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Bug ID: JDK-6692906 CMS: parallel concurrent marking may be prone to hanging or stalling mutators for periods of time
JDK-6692906 : CMS: parallel concurrent marking may be prone to hanging or stalling mutators for periods of time

Details
Type:
Bug
Submit Date:
2008-04-23
Status:
Closed
Updated Date:
2013-09-12
Project Name:
JDK
Resolved Date:
2011-03-07
Component:
hotspot
OS:
linux,generic
Sub-Component:
gc
CPU:
x86,generic
Priority:
P3
Resolution:
Fixed
Affected Versions:
hs12,hs20,6u14,7
Fixed Versions:
hs20 (b02)

Related Reports
Backport:
Backport:
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Relates:
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Sub Tasks

Description
The situation is most easily exhibited on, for example, a Huron or Maramba,
where we get a large number of ParallelCMSThreads, using one of the
vm.parallel_class_loading tests.

                                    

Comments
EVALUATION

See comments section.
                                     
2008-04-23
WORK AROUND

Disable parallel concurrent marking via either:-

  -XX:-CMSConcurrentMTEnabled

OR

  -XX:ParallelCMSThreads=0
                                     
2008-04-23
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/c99c53f07c14
                                     
2010-09-30
SUGGESTED FIX

See URL in Evaluation section for final fix & for backports.
                                     
2010-10-01
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot/hotspot/rev/c99c53f07c14
                                     
2010-10-09



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