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Zhihua Deng edited comment on HBASE-16212 at 7/12/16 3:44 AM: -------------------------------------------------------------- Some related logs from region server: 2016-07-10 21:31:42,147 INFO [B.defaultRpcServer.handler=22,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 111506876, targetPos: 111506843 2016-07-10 21:31:42,715 INFO [B.defaultRpcServer.handler=25,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 113544644, targetPos: 113544611 2016-07-10 21:31:43,341 INFO [B.defaultRpcServer.handler=27,queue=0,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 115547269, targetPos: 115547236 2016-07-10 21:31:43,950 INFO [B.defaultRpcServer.handler=16,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 117532235, targetPos: 117532202 2016-07-10 21:31:43,988 INFO [B.defaultRpcServer.handler=7,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 119567867, targetPos: 119567834 2016-07-10 21:31:45,228 INFO [B.defaultRpcServer.handler=19,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 121787264, targetPos: 121787231 2016-07-10 21:31:45,254 INFO [B.defaultRpcServer.handler=0,queue=0,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 123910032, targetPos: 123909999 2016-07-10 21:31:46,402 INFO [B.defaultRpcServer.handler=26,queue=2,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 125905163, targetPos: 125905130 2016-07-10 21:31:47,027 INFO [B.defaultRpcServer.handler=24,queue=0,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 128028947, targetPos: 128028914 2016-07-10 21:31:47,649 INFO [B.defaultRpcServer.handler=10,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 130057763, targetPos: 130057730 was (Author: dengzh): Some related logs from region server: <pre> 2016-07-10 21:31:42,147 INFO [B.defaultRpcServer.handler=22,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 111506876, targetPos: 111506843 2016-07-10 21:31:42,715 INFO [B.defaultRpcServer.handler=25,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 113544644, targetPos: 113544611 2016-07-10 21:31:43,341 INFO [B.defaultRpcServer.handler=27,queue=0,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 115547269, targetPos: 115547236 2016-07-10 21:31:43,950 INFO [B.defaultRpcServer.handler=16,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 117532235, targetPos: 117532202 2016-07-10 21:31:43,988 INFO [B.defaultRpcServer.handler=7,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 119567867, targetPos: 119567834 2016-07-10 21:31:45,228 INFO [B.defaultRpcServer.handler=19,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 121787264, targetPos: 121787231 2016-07-10 21:31:45,254 INFO [B.defaultRpcServer.handler=0,queue=0,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 123910032, targetPos: 123909999 2016-07-10 21:31:46,402 INFO [B.defaultRpcServer.handler=26,queue=2,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 125905163, targetPos: 125905130 2016-07-10 21:31:47,027 INFO [B.defaultRpcServer.handler=24,queue=0,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 128028947, targetPos: 128028914 2016-07-10 21:31:47,649 INFO [B.defaultRpcServer.handler=10,queue=1,port=16020] hdfs.DFSClient: DFSClient_NONMAPREDUCE_1984924661_1 seek DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: 130057763, targetPos: 130057730 </pre> > Many Connections are created by wrong seeking pos on InputStream > ---------------------------------------------------------------- > > Key: HBASE-16212 > URL: https://issues.apache.org/jira/browse/HBASE-16212 > Project: HBase > Issue Type: Bug > Affects Versions: 1.1.2 > Reporter: Zhihua Deng > > As described in https://issues.apache.org/jira/browse/HDFS-8659, the datanode > is suffering from logging the same repeatedly. Adding log to DFSInputStream, > it outputs as follows: > 2016-07-10 21:31:42,147 INFO > [B.defaultRpcServer.handler=22,queue=1,port=16020] hdfs.DFSClient: > DFSClient_NONMAPREDUCE_1984924661_1 seek > DatanodeInfoWithStorage[10.130.1.29:50010,DS-086bc494-d862-470c-86e8-9cb7929985c6,DISK] > for BP-360285305-10.130.1.11-1444619256876:blk_1109360829_35627143. pos: > 111506876, targetPos: 111506843 > ... > As the pos of this input stream is larger than targetPos(the pos trying to > seek), A new connection to the datanode will be created, the older one will > be closed as a consequence. When the wrong seeking ops are large, the > datanode's block scanner info message is spamming logs, as well as many > connections to the same datanode will be created. -- This message was sent by Atlassian JIRA (v6.3.4#6332)