JDK-8077383 : Re-enable eager reclaim by default
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 9
  • Priority: P2
  • Status: Closed
  • Resolution: Not an Issue
  • Submitted: 2015-04-10
  • Updated: 2016-04-14
  • Resolved: 2015-04-28
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JDK 9
9Resolved
Related Reports
Blocks :  
JDK-8077284 - assert((*t)->is_oop_or_null()) failed: Expected an oop or NULL
Blocks :  
JDK-8072598 - G1 may incorrectly try to reclaim humongous non-Array objects containing references
Blocks :  
JDK-8077382 - Temporarily disable eager reclaim by default
Blocks :  
JDK-8069367 - Eagerly reclaimed humongous objects left on mark stack
Blocks :  
JDK-8078023 - verify_no_cset_oops found reclaimed humongous object in SATB buffer
Blocks :  
JDK-8076568 - vm/gc/compact/Humongous_Arrays Crash EXCEPTION_ACCESS_VIOLATION
Blocks :  
JDK-8075215 - SATB buffer processing found reclaimed humongous object
Relates :  
JDK-8069367 - Eagerly reclaimed humongous objects left on mark stack
Description
In JDK-8077382 we temporarily disabled eager reclaim to decrease the noise in the nightlies. This change should change the value back to enabled after known bugs have been fixed.
Comments
While preparing this change, the main fix for the entire problem (JDK-8069367) got pushed to jdk9. Last fixes are currently out for review.
28-04-2015
ILW = High (large performance impact), Medium (only some applications), Low (enable early reclaim manually) = P2
10-04-2015
JDK-8077284 also looks like to be caused by eager reclaim
10-04-2015