Error: "Name node is in safe mode" when launching spark-shell

Lab Support
#1

20/07/20 23:17:41 ERROR SparkContext: Error initializing SparkContext.
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.SafeModeException): Cannot create file/spark2-history/local-1595
287059862.inprogress. Name node is in safe mode.
Resources are low on NN. Please add or free up more resources then turn off safe mode manually. NOTE: If you turn off safe mode before addin
g resources, the NN will immediately return to safe mode. Use “hdfs dfsadmin -safemode leave” to turn safe mode off.

#2

Hi,

As we were upgrading the machines yesterday, the namenode was in safe mode for sometime. It is back to the normal.

Regards,
Sandeep Giri