[HDFS-14448] Provide an appropriate Message when Secondary Namenode is not bootstrap initialized

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.6.0
• Component/s: hdfs
• Assignee: Unassigned
• Reporter: Sailesh Patel
• Created: 23/Apr/19 01:35
• Updated: 23/Apr/19 01:35

Description

After  HDFS is running for some time and then it is enabled for HDFS-HA, if the secondary bootstrap fails ( say because active NN was down),  and then it is attempted to be started, the message in secondary NN says "NameNode is not formatted."

e.g.
2019-04-16 19:43:27,951 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode. java.io.IOException: NameNode is not formatted. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:232) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1144)
 

Can this message be improved to  say:

 "Secondary NameNode is not initialized. Please Bootstrap Secondary Namenode"

or

 "NameNode is not formatted/Secondary Namenode not Bootstrapped(Initialized)"

This is to avoid customers mistakenly formatting namenode and there by losing data.