[HADOOP-3732] Block scanner should read block information during initialization.

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.17.0
• Fix Version/s: 0.19.0
• Assignee: Raghu Angadi
• Reporter: Konstantin Shvachko
• Created: 09/Jul/08 18:41
• Updated: 08/Jul/09 16:43
• Resolved: 16/Jul/08 01:46

Description

We see a lot of warning messages on each data-node during startup and upgrading from 0.17 to 0.18 saying:

2008-07-08 22:22:15,711 WARN org.apache.hadoop.dfs.DataNode: Block /grid/3/hadoop/var/hdfs/data/current/blk_3359714082706415785 does not have a metafile!

The message received twice for each block, because the block information is first read buy the data-node itself and then by the block scanner.