[HADOOP-3724] Namenode does not start due to exception throw while saving Image

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.18.0
• Fix Version/s: 0.18.0
• Hadoop Flags: Reviewed
• Assignee: Dhruba Borthakur
• Reporter: Lohit Vijaya Renu
• Created: 09/Jul/08 02:08
• Updated: 02/May/13 02:29
• Resolved: 25/Jul/08 17:53

Description

Re-start of namenode failed with this stack trace while savingImage during initialization

2008-07-09 00:20:21,470 INFO org.apache.hadoop.ipc.Server: Stopping server on 9000
2008-07-09 00:20:21,493 ERROR org.apache.hadoop.dfs.NameNode: java.io.IOException: saveLeases found path /foo/bar/jambajuice but no matching entry in namespace.  
at org.apache.hadoop.dfs.FSNamesystem.saveFilesUnderConstruction(FSNamesystem.java:4376)  
at org.apache.hadoop.dfs.FSImage.saveFSImage(FSImage.java:874)  
at org.apache.hadoop.dfs.FSImage.saveFSImage(FSImage.java:892)  
at org.apache.hadoop.dfs.FSDirectory.loadFSImage(FSDirectory.java:81)   
at org.apache.hadoop.dfs.FSNamesystem.initialize(FSNamesystem.java:273)   
at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:252)   
at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:148)   
at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:193)   
at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:179)   
at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:822)  
at org.apache.hadoop.dfs.NameNode.main(NameNode.java:831)

Looks like it was throwing IOException in saveFilesUnderConstruction

Before restart NameNode was killed while some jobs were running. Upon looking at the namenode log before the stopping of namenode, there were many entries like this

2008-07-09 00:12:55,301 INFO org.apache.hadoop.fs.FSNamesystem: Recovering lease=[Lease.  Holder: DFSClient_-510679348, pendingcreates: 1], src=/foo/bar/jambajuice
2008-07-09 00:12:55,301 WARN org.apache.hadoop.dfs.StateChange: DIR* NameSystem.internalReleaseCreate: attempt to release a create lock on /foo/bar/jambajuice  file does not exist.

These 2 lines are repeated forever every second, to a point where I see that a 7 node cluster had namenode log with size close to 41G.

Could not find any other information about the file as there were not previous namenode logs.

Issue Links

• is depended upon by: HADOOP-3793 HADOOP-3724 reopened
• relates to: HADOOP-3775 Namenode trapped in an infinite loop