[HDFS-4657] Limit the number of blocks logged by the NN after a block report to a configurable value.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.4-alpha
• Fix Version/s: 2.3.0
• Component/s: namenode
• Target Version/s: 2.1.0-beta
• Assignee: Aaron Myers
• Reporter: Aaron Myers
• Created: 02/Apr/13 01:34
• Updated: 24/Feb/14 20:57
• Resolved: 16/Jul/13 20:11

Description

If incremental BR is received before first full BR NN will log a line for every block on a DN.

This can impact restart times pretty substantially if the DNs have a lot of blocks, and since the FSNS write lock is held while processing the block report clients will not make any progress.