[HDFS-2007] Backupnode downloading image/edits from Namenode at every checkpoint ..

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Component/s: namenode
• Tags: backupnode,checkpointing
• Assignee: SreeHari
• Reporter: SreeHari
• Created: 27/May/11 10:31
• Updated: 20/Dec/11 05:13
• Resolved: 20/Dec/11 05:13

Description

After the fix for HDFS-903 ( md5 verification of fsimage ) , Backupnode is downloading the image & edit files from namenode everytime since the difference in checkpoint time is always maintined b/w Namenode and Backupnode .

This happens since Namenode is resetting its checkpoint time after every checkpoint since we are ignoring renewCheckpointTime and passing true explicitly to rollFsimage during endcheckpoint , while Backupnode is setting its checkpointtime to whatever it got from the namenode during startcheckpoint()

Thus , checkpointtimes will be different during the next checkpoint and ll cause the image to be downloaded again ..

Issue Links

• is duplicated by: HDFS-2698 BackupNode is downloading image from NameNode for every checkpoint