We are using HDP 3.0 in my project which is in 2 node. For every 20-30 days name node is going to safe mode with below errors. For every time I am manually executing below command to leave safe mode.
hdfs dfsadmin -safemode leave
below are the logs of secondary namenode.(we lost namendoe logs)
ERROR namenode.SecondaryNameNode (SecondaryNameNode.java:doWork(365)) - Exception in doCheckpoint
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Log not rolled. Name node is in safe mode.
Resources are low on NN. Please add or free up more resourcesthen turn off safe mode manually. NOTE: If you turn off safe mode before adding resources, the NN will immediately return to safe mode. Use "hdfs dfsadmin -safemode leave" to turn safe mode off. NamenodeHostName
may i know the reason why namenode is going to safemode repetedly.