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JDK-8008546 : WRONG G1CONFIDENCEPERCENT RESULTS IN GUARANTEE(VARIANCE() > -1.0) FAILED

Details
Type:
Bug
Submit Date:
2013-02-20
Status:
Resolved
Updated Date:
2013-04-30
Project Name:
JDK
Resolved Date:
2013-02-24
Component:
hotspot
OS:
linux
Sub-Component:
gc
CPU:
x86
Priority:
P4
Resolution:
Fixed
Affected Versions:
7u7
Fixed Versions:
hs25 (b21)

Related Reports
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Description
 Problem Statement
  =================
  If an out of range value was used with -XX:G1ConfidencePercent=N, e.g. 200,
  JVM may crash with following guarantee.  G1ConfidencePercent value should be
  validated before starting VM.
  
  #  Internal Error (numberSeq.cpp:184), pid=7292, tid=2067221360
  #  guarantee(variance() > -1.0) failed: variance should be >= 0
  
  Issue Clarification
  ===================
  Crash
    If an out of range value was used with -XX:G1ConfidencePercent=N, e.g.
  200, JVM may crash with following guarantee.
  #  Internal Error (numberSeq.cpp:184), pid=7292, tid=2067221360
  #  guarantee(variance() > -1.0) failed: variance should be >= 0
  
  How often have you seen the problem?
    Almost always with -XX:G1ConfidencePercent=200
  How reproducable is the problem?
    Run a java program which keeps allocating memory with following options.
    -XX:+UseG1GC -XX:G1ConfidencePercent=200
  
  system configuration
  ====================
  Full output from java -version
  java version "1.7.0_07"
  Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
  Java HotSpot(TM) Server VM (build 23.3-b01, mixed mode)
  
                                    

Comments
URL:   http://hg.openjdk.java.net/hsx/hsx25/hotspot/rev/f1fb03a251e9
User:  poonam
Date:  2013-02-24 03:55:36 +0000

                                     
2013-02-24



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