[CASSANDRA-4447] enable jamm for OpenJDK >= 1.6.0.23

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 1.1.3
• Component/s: Packaging

Environment

openjdk

• Assignee: paul cannon
• Reporter: Ilya Shipitsin

Authors

paul cannon

Reviewers

Brandon Williams

• Created: 19/Jul/12 06:37
• Updated: 16/Apr/19 09:32
• Resolved: 30/Jul/12 20:34

Description

we tested jamm with OpenJDK, it works well starting at 1.6.0.23, so I suggest

— cassandra-env.sh.dist 2012-07-19 12:24:44.938886154 +0600
+++ cassandra-env.sh 2012-07-19 12:28:34.913886847 +0600
@@ -119,8 +119,10 @@

1. add the jamm javaagent
   check_openjdk=`"${JAVA:-java}" -version 2>&1 | awk '{if (NR == 2) {print $1}}'`
   -if [ "$check_openjdk" != "OpenJDK" ]
   +check_openjdk_is_good_for_jamm=`"${JAVA:-java}" -version 2>&1 | awk -F "_|\"" '/1\.6\.0/ && $3 < 23 {print "bad" }

   '`
   +if [ "$check_openjdk" = "OpenJDK" ] && [ "$check_openjdk_is_good_for_jamm" = "bad" ]
   then
   +else
   JVM_OPTS="$JVM_OPTS -javaagent:$CASSANDRA_HOME/lib/jamm-0.2.5.jar"
   fi