不多说,直接上代码. 2016-12-12 21:54:04,509 INFO [org.apache.hadoop.metrics.jvm.JvmMetrics] - Initializing JVM Metrics with processName=JobTracker, sessionId=2016-12-12 21:54:05,166 WARN [org.apache.hadoop.mapreduce.JobSubmitter] - Hadoop command-line option…