[HDFS-4122] Cleanup HDFS logs and reduce the size of logged messages

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 2.0.0-alpha
• Fix Version/s: 1.2.0, 2.0.3-alpha
• Component/s: datanode, hdfs-client, namenode
• Hadoop Flags: Incompatible change, Reviewed

Release Note

The change from this jira changes the content of some of the log messages. No log message are removed. Only the content of the log messages is changed to reduce the size. If you have a tool that depends on the exact content of the log, please look at the patch and make appropriate updates to the tool.

• Assignee: Suresh Srinivas
• Reporter: Suresh Srinivas
• Created: 27/Oct/12 19:00
• Updated: 03/Sep/14 23:11
• Resolved: 29/Oct/12 02:22

Description

I have attached the patch that removes unnecessary information from the log such as "Namesystem." and prefixing file information with "file" and block information with "block" etc.

On a branch-1 log I saw it reduce the log size by ~10%.

Issue Links

• breaks: HDFS-4180 TestFileCreation fails in branch-1 but not branch-1.1
• is related to: HDFS-4782 backport edit log corruption toleration to branch-1-win