[#HADOOP-3863] Use a thread-local rather than static ENCODER/DECODER variables in Text for synchronization

Hadoop Common

Use a thread-local rather than static ENCODER/DECODER variables in Text for synchronization

Created: 30/Jul/08 05:59 PM Updated: 08/Jul/09 04:52 PM

Return to search

Component/s:

None

Affects Version/s:

0.18.0

Fix Version/s:

0.19.0

Time Tracking:

Not Specified

File Attachments:

File Name	Date Attached	Attached By	Size
HADOOP-3863_0_20080730.patch	2008-07-30 06:53 PM	Arun C Murthy	5 kB
HADOOP-3863_1_20080730.patch	2008-07-30 09:57 PM	Arun C Murthy	5 kB

Hadoop Flags:	Reviewed
Resolution Date:	30/Jul/08 10:59 PM

Description

« Hide

Text.{ENCODER|DECODER} are static variables which need to be synchronized in Text.{read|write}String; given that lots of RPC code calls Text.{read|write}String the contention for this lock shows up very significantly on large clusters.

All

Comments

Work Log

Change History

Subversion Commits

Sort Order:

Repository	Revision	Date	User	Message
ASF	#681238	Wed Jul 30 22:59:02 UTC 2008	omalley	~~HADOOP-3863~~. Use a thread-local string encoder rather than a static one that is protected by a lock. (acmurthy via omalley)
				Files Changed
				MODIFY /hadoop/core/trunk/src/core/org/apache/hadoop/io/Text.java MODIFY /hadoop/core/trunk/CHANGES.txt MODIFY /hadoop/core/trunk/src/test/org/apache/hadoop/io/TestText.java