JDK-8170388 : Deprecate the flag -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2016-11-28
  • Updated: 2017-05-17
  • Resolved: 2016-11-30
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JDK 9
9 b150Fixed
Related Reports
Relates :  
JDK-8170067 - -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses is not implemented for G1
Sub Tasks
JDK-8179529 :  
Release Note: Deprecate the flag -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses - Closed
Description
The class -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses is no longer necessary since there already are two flags covering this functionality:
-XX:ExplicitGCInvokesConcurrent
-XX:ClassUnloadingWithConcurrentMark

The above two flags are sufficient to express -XX:+ExplicitGCInvokesConcurrentAndUnloadsClasses, just enable the above two flags :-XX:+ExplicitGCInvokesConcurrent -XX:+ClassUnloadingWithConcurrentMark. Therefore, the flag -XX:ExplicitGCInvokesConcurrentAndUnloadsClasses should be deprecated and removed in a future release, it provides no extra functionality and is cumbersome to validate.