Jason918 commented on a change in pull request #3311:
URL: https://github.com/apache/rocketmq/pull/3311#discussion_r722847560



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File path: distribution/bin/runbroker.sh
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@@ -66,25 +73,44 @@ choose_gc_log_directory
 
 JAVA_OPT="${JAVA_OPT} -server -Xms8g -Xmx8g"
 JAVA_OPT="${JAVA_OPT} -XX:+UseG1GC -XX:G1HeapRegionSize=16m 
-XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 
-XX:SoftRefLRUPolicyMSPerMB=0"
-JAVA_OPT="${JAVA_OPT} -verbose:gc 
-Xloggc:${GC_LOG_DIR}/rmq_broker_gc_%p_%t.log -XX:+PrintGCDetails 
-XX:+PrintGCDateStamps -XX:+PrintGCApplicationStoppedTime 
-XX:+PrintAdaptiveSizePolicy"
-JAVA_OPT="${JAVA_OPT} -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 
-XX:GCLogFileSize=30m"
+
+ZULU_JDK_CHECK=$($JAVA -version 2>&1 | grep -i zulu | wc -l)
+if [ $ZULU_JDK_CHECK -eq 0 ]; then

Review comment:
       There's no gc options in zulu JDK at all?




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