hadoop的java.opts设立有误导致jotsetup失败

hadoop的java.opts设置有误导致jotsetup失败
由于各台机器配置不同，想单独设置每个节点的mapred.child.java.opts参数，开始设置为

<property><name>mapred.child.java.opts</name><value>-Xms512m -Xmx512m -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+CMSClassUnloadingEnabled -XX:CMSInitiatingOccupancyFraction=80 -XX:PretenureSizeThreshold</value></property>

<property><name>mapred.child.java.opts</name><value>-Xms512m -Xmx512m -XX:+UseConcMarkSweepGC</value></property>