ndimiduk commented on a change in pull request #1527: HBASE-24143 [JDK11]
Switch default garbage collector from CMS
URL: https://github.com/apache/hbase/pull/1527#discussion_r410403724
##########
File path: bin/hbase
##########
@@ -136,6 +136,21 @@ if [ -f "$HBASE_HOME/conf/hbase-env-$COMMAND.sh" ]; then
. "$HBASE_HOME/conf/hbase-env-$COMMAND.sh"
fi
+# establish a default value for HBASE_OPTS if it's not already set. For now,
+# all we set is the garbage collector.
+if [ -z "${HBASE_OPTS}" ] ; then
+ major_version_number="$(parse_java_major_version "$(read_java_version)")"
+ case "$major_version_number" in
+ 8|9|10)
+ HBASE_OPTS="-XX:+UseConcMarkSweepGC"
+ ;;
+ 11|*)
+ HBASE_OPTS="-XX:+UseG1GC"
Review comment:
> What do you mean by launch contexts here?
I mean any of the various classes that are eventually launched by
`bin/hbase`. Some paths append server-specific settings, client-specific,
shell-specific, and others append nothing. From what I can tell, all of these
start with `HBASE_OPTS`.
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