RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby 两个namenode都是standby 在一台主机上执行: hdfs haadmin -transitionToActive --forcemanual nn1 再访问,一台active 一台standy
序列化问题 If you see this error: 如果你在Spark任务提交之后碰到了这样的情况: org.apache.spark.SparkException: Job aborted due to stage failure: Task not serializable: java.io.NotSerializableException: ... The above error can be triggered when you intialize a variable on the driver ...