[#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

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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

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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.

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Arun C Murthy made changes - 30/Jul/08 06:53 PM

Field	Original Value	New Value
Attachment		HADOOP-3863_0_20080730.patch [ 12387218 ]

Arun C Murthy made changes - 30/Jul/08 06:53 PM

Status

Open [ 1 ]

Patch Available [ 10002 ]

Arun C Murthy made changes - 30/Jul/08 09:57 PM

Attachment

HADOOP-3863_1_20080730.patch [ 12387235 ]

Owen O'Malley made changes - 30/Jul/08 10:59 PM

Resolution		Fixed [ 1 ]
Hadoop Flags		[Reviewed]
Status	Patch Available [ 10002 ]	Resolved [ 5 ]

Nigel Daley made changes - 20/Nov/08 11:38 PM

Status

Resolved [ 5 ]

Closed [ 6 ]

Owen O'Malley made changes - 08/Jul/09 04:52 PM

Component/s

mapred [ 12310690 ]