Hadoop问题：There are 0 datanode(s) running and no node(s) are excluded in this operation.

问题描述： org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /tmp/hadoop-yarn/staging/hadoop/.staging/job_1519998981934_0001/job.jar could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded in this operation.问题描述： org.apache.hadoop.ipc.RemoteException(jav