FULL PRODUCT VERSION :
vm_info: Java HotSpot(TM) 64-Bit Server VM (14.3-b01) for linux-amd64 JRE (1.6.0_17-b04), built on Oct 11 2009 01:08:48 by "java_re" with gcc 3.2.2 (SuSE Linux)
FULL OS VERSION :
uname:Linux 2.6.31.5-0.1-desktop #1 SMP PREEMPT 2009-10-26 15:49:03 +0100 x86_64
A DESCRIPTION OF THE PROBLEM :
I was surprised by a vm crash when i played around with a very simple method that creates ArrayLists using the vm options
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+DoEscapeAnalysis
The crash only happens when i use both options.
THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try
THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the source method below and set vm options
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+DoEscapeAnalysis
EXPECTED VERSUS ACTUAL BEHAVIOR :
vm should not crash
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Attached Seperatly
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
public void ObjectCreation() {
int nObjects=100000;
for(int i=0; i < 1000; i++){
ArrayList<String> a = new ArrayList<String>();
}
for(int i=0; i < nObjects; i++){
ArrayList<String> a = new ArrayList<String>();
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
The crash only happens when i set these vm options
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+DoEscapeAnalysis
it doesn`t happen when i drop -XX:+DoEscapeAnalysis
vm_info: Java HotSpot(TM) 64-Bit Server VM (14.3-b01) for linux-amd64 JRE (1.6.0_17-b04), built on Oct 11 2009 01:08:48 by "java_re" with gcc 3.2.2 (SuSE Linux)
FULL OS VERSION :
uname:Linux 2.6.31.5-0.1-desktop #1 SMP PREEMPT 2009-10-26 15:49:03 +0100 x86_64
A DESCRIPTION OF THE PROBLEM :
I was surprised by a vm crash when i played around with a very simple method that creates ArrayLists using the vm options
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+DoEscapeAnalysis
The crash only happens when i use both options.
THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try
THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the source method below and set vm options
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+DoEscapeAnalysis
EXPECTED VERSUS ACTUAL BEHAVIOR :
vm should not crash
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Attached Seperatly
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
public void ObjectCreation() {
int nObjects=100000;
for(int i=0; i < 1000; i++){
ArrayList<String> a = new ArrayList<String>();
}
for(int i=0; i < nObjects; i++){
ArrayList<String> a = new ArrayList<String>();
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
The crash only happens when i set these vm options
-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+DoEscapeAnalysis
it doesn`t happen when i drop -XX:+DoEscapeAnalysis
- duplicates
-
JDK-6851742 (EA) allocation elimination doesn't work with UseG1GC
-
- Closed
-