[ 
https://issues.apache.org/jira/browse/HDFS-6836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Arpit Agarwal updated HDFS-6836:
--------------------------------

    Description: 
Reported by:  [~gopalv].

The HDFS INFO logs is present within the inner loops of HDFS logging 
information like
{code}
2014-07-24 19:43:34,459 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.113:43666, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
 offset: 86616576, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
6827335
2014-07-24 19:43:34,465 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.117:41731, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn117-10.l42scl.hortonworks.com,53868,1406227155459_1689003704_33,
 offset: 72691200, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074926372_1186916, duration: 
7178626
2014-07-24 19:43:34,467 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.113:43669, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
 offset: 86813696, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
8540703
2014-07-24 19:43:34,474 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.117:41733, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn117-10.l42scl.hortonworks.com,53868,1406227155459_1689003704_33,
 offset: 72822272, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074926372_1186916, duration: 
8220422
2014-07-24 19:43:34,477 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.113:43672, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
 offset: 86944768, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
8327499
{code}

Looks like future releases of log4j will fix this to be faster - 
https://issues.apache.org/jira/browse/LOG4J2-163

  was:
Reported by:  Gopal Vijayaraghavan

The HDFS INFO logs is present within the inner loops of HDFS logging 
information like
2014-07-24 19:43:34,459 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.113:43666, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
 offset: 86616576, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
6827335
2014-07-24 19:43:34,465 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.117:41731, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn117-10.l42scl.hortonworks.com,53868,1406227155459_1689003704_33,
 offset: 72691200, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074926372_1186916, duration: 
7178626
2014-07-24 19:43:34,467 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.113:43669, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
 offset: 86813696, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
8540703
2014-07-24 19:43:34,474 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.117:41733, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn117-10.l42scl.hortonworks.com,53868,1406227155459_1689003704_33,
 offset: 72822272, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074926372_1186916, duration: 
8220422
2014-07-24 19:43:34,477 INFO  DataNode.clienttrace 
(BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
/172.21.128.113:43672, bytes: 786432, op: HDFS_READ, cliID: 
DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
 offset: 86944768, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
8327499
Looks like future releases of log4j will fix this to be faster 
-https://issues.apache.org/jira/browse/LOG4J2-163


> HDFS INFO logging is verbose & uses file appenders
> --------------------------------------------------
>
>                 Key: HDFS-6836
>                 URL: https://issues.apache.org/jira/browse/HDFS-6836
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Xiaoyu Yao
>            Priority: Critical
>
> Reported by:  [~gopalv].
> The HDFS INFO logs is present within the inner loops of HDFS logging 
> information like
> {code}
> 2014-07-24 19:43:34,459 INFO  DataNode.clienttrace 
> (BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
> /172.21.128.113:43666, bytes: 786432, op: HDFS_READ, cliID: 
> DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
>  offset: 86616576, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
> BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
> 6827335
> 2014-07-24 19:43:34,465 INFO  DataNode.clienttrace 
> (BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
> /172.21.128.117:41731, bytes: 786432, op: HDFS_READ, cliID: 
> DFSClient_hb_rs_cn117-10.l42scl.hortonworks.com,53868,1406227155459_1689003704_33,
>  offset: 72691200, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
> BP-971413386-172.21.128.105-1398117368124:blk_1074926372_1186916, duration: 
> 7178626
> 2014-07-24 19:43:34,467 INFO  DataNode.clienttrace 
> (BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
> /172.21.128.113:43669, bytes: 786432, op: HDFS_READ, cliID: 
> DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
>  offset: 86813696, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
> BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
> 8540703
> 2014-07-24 19:43:34,474 INFO  DataNode.clienttrace 
> (BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
> /172.21.128.117:41733, bytes: 786432, op: HDFS_READ, cliID: 
> DFSClient_hb_rs_cn117-10.l42scl.hortonworks.com,53868,1406227155459_1689003704_33,
>  offset: 72822272, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
> BP-971413386-172.21.128.105-1398117368124:blk_1074926372_1186916, duration: 
> 8220422
> 2014-07-24 19:43:34,477 INFO  DataNode.clienttrace 
> (BlockSender.java:sendBlock(738)) - src: /172.21.128.105:50010, dest: 
> /172.21.128.113:43672, bytes: 786432, op: HDFS_READ, cliID: 
> DFSClient_hb_rs_cn113-10.l42scl.hortonworks.com,50700,1406227155474_1075922312_33,
>  offset: 86944768, srvID: 3f80f56f-a6ea-4951-8db6-86b51938d144, blockid: 
> BP-971413386-172.21.128.105-1398117368124:blk_1074925960_1186504, duration: 
> 8327499
> {code}
> Looks like future releases of log4j will fix this to be faster - 
> https://issues.apache.org/jira/browse/LOG4J2-163



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