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Posted to common-user@hadoop.apache.org by Todd Lipcon <to...@cloudera.com> on 2011/03/10 19:05:53 UTC
Re: Could not obtain block
[moving to common-user, since this spans both MR and HDFS - probably
easier than cross-posting]
Can you check the DN logs for "exceeds the limit of concurrent
xcievers"? You may need to bump the dfs.datanode.max.xcievers
parameter in hdfs-site.xml, and also possibly the nfiles ulimit.
-Todd
On Wed, Mar 9, 2011 at 3:27 AM, Evert Lammerts <Ev...@sara.nl> wrote:
> We see a lot of IOExceptions coming from HDFS during a job that does nothing but untar 100 files (1 per Mapper, sizes vary between 5GB and 80GB) that are in HDFS, to HDFS. DataNodes are also showing Exceptions that I think are related. (See stacktraces below.)
>
> This job should not be able to overload the system I think... I realize that much data needs to go over the lines, but HDFS should still be responsive. Any ideas / help is much appreciated!
>
> Some details:
> * Hadoop 0.20.2 (CDH3b4)
> * 5 node cluster plus 1 node for JT/NN (Sun Thumpers)
> * 4 cores/node, 4GB RAM/core
> * CentOS 5.5
>
> Job output:
>
> java.io.IOException: java.io.IOException: Could not obtain block: blk_-3695352030358969086_130839 file=/user/emeij/icwsm-data-test/01-26-SOCIAL_MEDIA.tar.gz
> at ilps.DownloadICWSM$UntarMapper.map(DownloadICWSM.java:449)
> at ilps.DownloadICWSM$UntarMapper.map(DownloadICWSM.java:1)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:390)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:324)
> at org.apache.hadoop.mapred.Child$4.run(Child.java:240)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)
> at org.apache.hadoop.mapred.Child.main(Child.java:234)
> Caused by: java.io.IOException: Could not obtain block: blk_-3695352030358969086_130839 file=/user/emeij/icwsm-data-test/01-26-SOCIAL_MEDIA.tar.gz
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1977)
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1784)
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1932)
> at java.io.DataInputStream.read(DataInputStream.java:83)
> at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:55)
> at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:74)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:335)
> at ilps.DownloadICWSM$CopyThread.run(DownloadICWSM.java:149)
>
>
> Example DataNode Exceptions (not that these come from the node at 192.168.28.211):
>
> 2011-03-08 19:40:40,297 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in receiveBlock for block blk_-9222067946733189014_3798233 java.io.EOFException: while trying to read 3067064 bytes
> 2011-03-08 19:40:41,018 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.28.211:50050, dest: /192.168.28.211:49748, bytes: 0, op: HDFS_READ, cliID: DFSClient_attempt_201103071120_0030_m_000032_0, offset: 30
> 72, srvID: DS-568746059-145.100.2.180-50050-1291128670510, blockid: blk_3596618013242149887_4060598, duration: 2632000
> 2011-03-08 19:40:41,049 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in receiveBlock for block blk_-9221028436071074510_2325937 java.io.EOFException: while trying to read 2206400 bytes
> 2011-03-08 19:40:41,348 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in receiveBlock for block blk_-9221549395563181322_4024529 java.io.EOFException: while trying to read 3037288 bytes
> 2011-03-08 19:40:41,357 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in receiveBlock for block blk_-9221885906633018147_3895876 java.io.EOFException: while trying to read 1981952 bytes
> 2011-03-08 19:40:41,434 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Block blk_-9221885906633018147_3895876 unfinalized and removed.
> 2011-03-08 19:40:41,434 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock blk_-9221885906633018147_3895876 received exception java.io.EOFException: while trying to read 1981952 bytes
> 2011-03-08 19:40:41,434 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(192.168.28.211:50050, storageID=DS-568746059-145.100.2.180-50050-1291128670510, infoPort=50075, ipcPort=50020):DataXceiver
> java.io.EOFException: while trying to read 1981952 bytes
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockReceiver.java:270)
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(BlockReceiver.java:357)
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:378)
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:534)
> at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:417)
> at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:122)
> 2011-03-08 19:40:41,465 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Block blk_-9221549395563181322_4024529 unfinalized and removed.
> 2011-03-08 19:40:41,466 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock blk_-9221549395563181322_4024529 received exception java.io.EOFException: while trying to read 3037288 bytes
> 2011-03-08 19:40:41,466 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(192.168.28.211:50050, storageID=DS-568746059-145.100.2.180-50050-1291128670510, infoPort=50075, ipcPort=50020):DataXceiver
> java.io.EOFException: while trying to read 3037288 bytes
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockReceiver.java:270)
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(BlockReceiver.java:357)
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:378)
> at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:534)
> at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:417)
> at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:122)
>
> Cheers,
>
> Evert Lammerts
> Consultant eScience & Cloud Services
> SARA Computing & Network Services
> Operations, Support & Development
>
> Phone: +31 20 888 4101
> Email: evert.lammerts@sara.nl
> http://www.sara.nl
>
>
>
--
Todd Lipcon
Software Engineer, Cloudera
RE: Could not obtain block
Posted by Evert Lammerts <Ev...@sara.nl>.
My bad! I have done a testrun with Kerberos on the cluster (which worked relatively well...). I was under the impression that just configuring the cluster to NOT use security would revert the process. But it turns out the HDFS deamons were still started using the SecureStarters. This seemed to mess up the network AND cause the high system load. After removing hadoop-0.20-sbin and restarting the cluster everything seems back to normal!
> -----Original Message-----
> From: Evert Lammerts [mailto:Evert.Lammerts@sara.nl]
> Sent: vrijdag 18 maart 2011 14:16
> To: 'Todd Lipcon'; common-user@hadoop.apache.org
> Cc: CDH Users
> Subject: RE: Could not obtain block
>
> > Can you check the DN logs for "exceeds the limit of concurrent
> > xcievers"? You may need to bump the dfs.datanode.max.xcievers
> > parameter in hdfs-site.xml, and also possibly the nfiles ulimit.
>
> Thanks Todd, and sorry for the late reply - I missed this message.
>
> I didn't see any xciever messages in the DN logs, but I figured it
> might be a good idea to up the nofiles uplimit. The result is a jsvc
> that is eating memory:
>
> $top
>
> Mem: 16320412k total, 16199036k used, 121376k free, 25412k
> buffers
> Swap: 33554424k total, 291492k used, 33262932k free, 10966732k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 24835 mapred 18 0 2644m 157m 8316 S 34.1 1.0 7031:27 java
> 14794 hdfs 18 0 2430m 1.5g 10m S 3.3 9.8 3:39.56 jsvc
>
>
> I'll revert it and see what effect dfs.datanode.max.xcievers will have.
>
> Cheers,
> Evert
>
> >
> > -Todd
> >
> >
> > On Wed, Mar 9, 2011 at 3:27 AM, Evert Lammerts
> <Ev...@sara.nl>
> > wrote:
> > > We see a lot of IOExceptions coming from HDFS during a job that
> does
> > nothing but untar 100 files (1 per Mapper, sizes vary between 5GB and
> > 80GB) that are in HDFS, to HDFS. DataNodes are also showing
> Exceptions
> > that I think are related. (See stacktraces below.)
> > >
> > > This job should not be able to overload the system I think... I
> > realize that much data needs to go over the lines, but HDFS should
> > still be responsive. Any ideas / help is much appreciated!
> > >
> > > Some details:
> > > * Hadoop 0.20.2 (CDH3b4)
> > > * 5 node cluster plus 1 node for JT/NN (Sun Thumpers)
> > > * 4 cores/node, 4GB RAM/core
> > > * CentOS 5.5
> > >
> > > Job output:
> > >
> > > java.io.IOException: java.io.IOException: Could not obtain block:
> > blk_-3695352030358969086_130839 file=/user/emeij/icwsm-data-test/01-
> 26-
> > SOCIAL_MEDIA.tar.gz
> > > at
> ilps.DownloadICWSM$UntarMapper.map(DownloadICWSM.java:449)
> > > at ilps.DownloadICWSM$UntarMapper.map(DownloadICWSM.java:1)
> > > at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
> > > at
> > org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:390)
> > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:324)
> > > at org.apache.hadoop.mapred.Child$4.run(Child.java:240)
> > > at java.security.AccessController.doPrivileged(Native
> Method)
> > > at javax.security.auth.Subject.doAs(Subject.java:396)
> > > at
> >
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformati
> > on.java:1115)
> > > at org.apache.hadoop.mapred.Child.main(Child.java:234)
> > > Caused by: java.io.IOException: Could not obtain block: blk_-
> > 3695352030358969086_130839 file=/user/emeij/icwsm-data-test/01-26-
> > SOCIAL_MEDIA.tar.gz
> > > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClien
> > t.java:1977)
> > > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.j
> > ava:1784)
> > > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:193
> > 2)
> > > at java.io.DataInputStream.read(DataInputStream.java:83)
> > > at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:55)
> > > at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:74)
> > > at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:335)
> > > at ilps.DownloadICWSM$CopyThread.run(DownloadICWSM.java:149)
> > >
> > >
> > > Example DataNode Exceptions (not that these come from the node at
> > 192.168.28.211):
> > >
> > > 2011-03-08 19:40:40,297 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> > receiveBlock for block blk_-9222067946733189014_3798233
> > java.io.EOFException: while trying to read 3067064 bytes
> > > 2011-03-08 19:40:41,018 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src:
> > /192.168.28.211:50050, dest: /192.168.28.211:49748, bytes: 0, op:
> > HDFS_READ, cliID: DFSClient_attempt_201103071120_0030_m_000032_0,
> > offset: 30
> > > 72, srvID: DS-568746059-145.100.2.180-50050-1291128670510, blockid:
> > blk_3596618013242149887_4060598, duration: 2632000
> > > 2011-03-08 19:40:41,049 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> > receiveBlock for block blk_-9221028436071074510_2325937
> > java.io.EOFException: while trying to read 2206400 bytes
> > > 2011-03-08 19:40:41,348 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> > receiveBlock for block blk_-9221549395563181322_4024529
> > java.io.EOFException: while trying to read 3037288 bytes
> > > 2011-03-08 19:40:41,357 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> > receiveBlock for block blk_-9221885906633018147_3895876
> > java.io.EOFException: while trying to read 1981952 bytes
> > > 2011-03-08 19:40:41,434 WARN
> > org.apache.hadoop.hdfs.server.datanode.DataNode: Block blk_-
> > 9221885906633018147_3895876 unfinalized and removed.
> > > 2011-03-08 19:40:41,434 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock blk_-
> > 9221885906633018147_3895876 received exception java.io.EOFException:
> > while trying to read 1981952 bytes
> > > 2011-03-08 19:40:41,434 ERROR
> > org.apache.hadoop.hdfs.server.datanode.DataNode:
> > DatanodeRegistration(192.168.28.211:50050, storageID=DS-568746059-
> > 145.100.2.180-50050-1291128670510, infoPort=50075,
> > ipcPort=50020):DataXceiver
> > > java.io.EOFException: while trying to read 1981952 bytes
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockRec
> > eiver.java:270)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(Blo
> > ckReceiver.java:357)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(Bloc
> > kReceiver.java:378)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(Block
> > Receiver.java:534)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiv
> > er.java:417)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java
> > :122)
> > > 2011-03-08 19:40:41,465 WARN
> > org.apache.hadoop.hdfs.server.datanode.DataNode: Block blk_-
> > 9221549395563181322_4024529 unfinalized and removed.
> > > 2011-03-08 19:40:41,466 INFO
> > org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock blk_-
> > 9221549395563181322_4024529 received exception java.io.EOFException:
> > while trying to read 3037288 bytes
> > > 2011-03-08 19:40:41,466 ERROR
> > org.apache.hadoop.hdfs.server.datanode.DataNode:
> > DatanodeRegistration(192.168.28.211:50050, storageID=DS-568746059-
> > 145.100.2.180-50050-1291128670510, infoPort=50075,
> > ipcPort=50020):DataXceiver
> > > java.io.EOFException: while trying to read 3037288 bytes
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockRec
> > eiver.java:270)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(Blo
> > ckReceiver.java:357)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(Bloc
> > kReceiver.java:378)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(Block
> > Receiver.java:534)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiv
> > er.java:417)
> > > at
> >
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java
> > :122)
> > >
> > > Cheers,
> > >
> > > Evert Lammerts
> > > Consultant eScience & Cloud Services
> > > SARA Computing & Network Services
> > > Operations, Support & Development
> > >
> > > Phone: +31 20 888 4101
> > > Email: evert.lammerts@sara.nl
> > > http://www.sara.nl
> > >
> > >
> > >
> >
> >
> >
> > --
> > Todd Lipcon
> > Software Engineer, Cloudera
RE: Could not obtain block
Posted by Evert Lammerts <Ev...@sara.nl>.
> Can you check the DN logs for "exceeds the limit of concurrent
> xcievers"? You may need to bump the dfs.datanode.max.xcievers
> parameter in hdfs-site.xml, and also possibly the nfiles ulimit.
Thanks Todd, and sorry for the late reply - I missed this message.
I didn't see any xciever messages in the DN logs, but I figured it might be a good idea to up the nofiles uplimit. The result is a jsvc that is eating memory:
$top
Mem: 16320412k total, 16199036k used, 121376k free, 25412k buffers
Swap: 33554424k total, 291492k used, 33262932k free, 10966732k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
24835 mapred 18 0 2644m 157m 8316 S 34.1 1.0 7031:27 java
14794 hdfs 18 0 2430m 1.5g 10m S 3.3 9.8 3:39.56 jsvc
I'll revert it and see what effect dfs.datanode.max.xcievers will have.
Cheers,
Evert
>
> -Todd
>
>
> On Wed, Mar 9, 2011 at 3:27 AM, Evert Lammerts <Ev...@sara.nl>
> wrote:
> > We see a lot of IOExceptions coming from HDFS during a job that does
> nothing but untar 100 files (1 per Mapper, sizes vary between 5GB and
> 80GB) that are in HDFS, to HDFS. DataNodes are also showing Exceptions
> that I think are related. (See stacktraces below.)
> >
> > This job should not be able to overload the system I think... I
> realize that much data needs to go over the lines, but HDFS should
> still be responsive. Any ideas / help is much appreciated!
> >
> > Some details:
> > * Hadoop 0.20.2 (CDH3b4)
> > * 5 node cluster plus 1 node for JT/NN (Sun Thumpers)
> > * 4 cores/node, 4GB RAM/core
> > * CentOS 5.5
> >
> > Job output:
> >
> > java.io.IOException: java.io.IOException: Could not obtain block:
> blk_-3695352030358969086_130839 file=/user/emeij/icwsm-data-test/01-26-
> SOCIAL_MEDIA.tar.gz
> > at ilps.DownloadICWSM$UntarMapper.map(DownloadICWSM.java:449)
> > at ilps.DownloadICWSM$UntarMapper.map(DownloadICWSM.java:1)
> > at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
> > at
> org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:390)
> > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:324)
> > at org.apache.hadoop.mapred.Child$4.run(Child.java:240)
> > at java.security.AccessController.doPrivileged(Native Method)
> > at javax.security.auth.Subject.doAs(Subject.java:396)
> > at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformati
> on.java:1115)
> > at org.apache.hadoop.mapred.Child.main(Child.java:234)
> > Caused by: java.io.IOException: Could not obtain block: blk_-
> 3695352030358969086_130839 file=/user/emeij/icwsm-data-test/01-26-
> SOCIAL_MEDIA.tar.gz
> > at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClien
> t.java:1977)
> > at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.j
> ava:1784)
> > at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:193
> 2)
> > at java.io.DataInputStream.read(DataInputStream.java:83)
> > at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:55)
> > at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:74)
> > at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:335)
> > at ilps.DownloadICWSM$CopyThread.run(DownloadICWSM.java:149)
> >
> >
> > Example DataNode Exceptions (not that these come from the node at
> 192.168.28.211):
> >
> > 2011-03-08 19:40:40,297 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> receiveBlock for block blk_-9222067946733189014_3798233
> java.io.EOFException: while trying to read 3067064 bytes
> > 2011-03-08 19:40:41,018 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src:
> /192.168.28.211:50050, dest: /192.168.28.211:49748, bytes: 0, op:
> HDFS_READ, cliID: DFSClient_attempt_201103071120_0030_m_000032_0,
> offset: 30
> > 72, srvID: DS-568746059-145.100.2.180-50050-1291128670510, blockid:
> blk_3596618013242149887_4060598, duration: 2632000
> > 2011-03-08 19:40:41,049 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> receiveBlock for block blk_-9221028436071074510_2325937
> java.io.EOFException: while trying to read 2206400 bytes
> > 2011-03-08 19:40:41,348 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> receiveBlock for block blk_-9221549395563181322_4024529
> java.io.EOFException: while trying to read 3037288 bytes
> > 2011-03-08 19:40:41,357 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> receiveBlock for block blk_-9221885906633018147_3895876
> java.io.EOFException: while trying to read 1981952 bytes
> > 2011-03-08 19:40:41,434 WARN
> org.apache.hadoop.hdfs.server.datanode.DataNode: Block blk_-
> 9221885906633018147_3895876 unfinalized and removed.
> > 2011-03-08 19:40:41,434 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock blk_-
> 9221885906633018147_3895876 received exception java.io.EOFException:
> while trying to read 1981952 bytes
> > 2011-03-08 19:40:41,434 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeRegistration(192.168.28.211:50050, storageID=DS-568746059-
> 145.100.2.180-50050-1291128670510, infoPort=50075,
> ipcPort=50020):DataXceiver
> > java.io.EOFException: while trying to read 1981952 bytes
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockRec
> eiver.java:270)
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(Blo
> ckReceiver.java:357)
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(Bloc
> kReceiver.java:378)
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(Block
> Receiver.java:534)
> > at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiv
> er.java:417)
> > at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java
> :122)
> > 2011-03-08 19:40:41,465 WARN
> org.apache.hadoop.hdfs.server.datanode.DataNode: Block blk_-
> 9221549395563181322_4024529 unfinalized and removed.
> > 2011-03-08 19:40:41,466 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock blk_-
> 9221549395563181322_4024529 received exception java.io.EOFException:
> while trying to read 3037288 bytes
> > 2011-03-08 19:40:41,466 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeRegistration(192.168.28.211:50050, storageID=DS-568746059-
> 145.100.2.180-50050-1291128670510, infoPort=50075,
> ipcPort=50020):DataXceiver
> > java.io.EOFException: while trying to read 3037288 bytes
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockRec
> eiver.java:270)
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(Blo
> ckReceiver.java:357)
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(Bloc
> kReceiver.java:378)
> > at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(Block
> Receiver.java:534)
> > at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiv
> er.java:417)
> > at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java
> :122)
> >
> > Cheers,
> >
> > Evert Lammerts
> > Consultant eScience & Cloud Services
> > SARA Computing & Network Services
> > Operations, Support & Development
> >
> > Phone: +31 20 888 4101
> > Email: evert.lammerts@sara.nl
> > http://www.sara.nl
> >
> >
> >
>
>
>
> --
> Todd Lipcon
> Software Engineer, Cloudera