<property> <name>mapred.child.java.opts</name> <value>-Xms512m -Xmx512m -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+CMSClassUnloadingEnabled -XX:CMSInitiatingOccupancyFraction=80 -XX:PretenureSizeThreshold</value> </property>
节点重启无误,但发现提交的job每次都setup fail,只有一一排查,最后精简为
<property> <name>mapred.child.java.opts</name> <value>-Xms512m -Xmx512m -XX:+UseConcMarkSweepGC</value> </property>
job才正确运行,估计有些参数不支持所致。