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HDFS >> mail # user >> Re: DataXceiver error processing WRITE_BLOCK operation src: /x.x.x.x:50373 dest: /x.x.x.x:50010


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Re: DataXceiver error processing WRITE_BLOCK operation src: /x.x.x.x:50373 dest: /x.x.x.x:50010
I am also having this issue and tried a lot of solutions, but could not
solve it.

]# ulimit -n ** running as root and hdfs (datanode user)
32768

]# cat /proc/sys/fs/file-nr
2080    0    8047008

]# lsof | wc -l
5157

Sometimes this issue happens from one node to the same node :(

I also think this issue is messing with my regionservers which are
crashing all day long!!

Thanks,
Pablo

On 03/08/2013 06:42 AM, Dhanasekaran Anbalagan wrote:
> Hi Varun
>
> I believe is not ulimit issue.
>
>
> /etc/security/limits.conf
> # End of file
> *               -      nofile          1000000
> *               -      nproc           1000000
>
>
> please guide me Guys, I want fix this. share your thoughts DataXceiver
> error.
>
> Did I learn something today? If not, I wasted it.
>
>
> On Fri, Mar 8, 2013 at 3:50 AM, varun kumar <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
>
>     Hi Dhana,
>
>     Increase the ulimit for all the datanodes.
>
>     If you are starting the service using hadoop increase the ulimit
>     value for hadoop user.
>
>     Do the  changes in the following file.
>
>     */etc/security/limits.conf*
>
>     Example:-
>     *hadoop          soft    nofile          35000*
>     *hadoop          hard    nofile          35000*
>
>     Regards,
>     Varun Kumar.P
>
>     On Fri, Mar 8, 2013 at 1:15 PM, Dhanasekaran Anbalagan
>     <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> wrote:
>
>         Hi Guys
>
>         I am frequently getting is error in my Data nodes.
>
>         Please guide what is the exact problem this.
>
>         dvcliftonhera138:50010:DataXceiver error processing WRITE_BLOCK operation src: /172.16.30.138:50373  <http://172.16.30.138:50373>  dest: /172.16.30.138:50010  <http://172.16.30.138:50010>
>
>
>
>         java.net.SocketTimeoutException: 70000 millis timeout while waiting for channel to be ready for read. ch : java.nio.channels.SocketChannel[connected local=/172.16.30.138:34280  <http://172.16.30.138:34280>  remote=/172.16.30.140:50010  <http://172.16.30.140:50010>]
>
>
>
>
>
>         at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
>         at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:154)
>         at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:127)
>
>
>
>
>
>         at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:115)
>         at java.io.FilterInputStream.read(FilterInputStream.java:66)
>         at java.io.FilterInputStream.read(FilterInputStream.java:66)
>         at org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:160)
>
>
>
>
>
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:405)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:98)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:66)
>
>
>
>
>
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:189)
>         at java.lang.Thread.run(Thread.java:662)
>
>
>         dvcliftonhera138:50010:DataXceiver error processing WRITE_BLOCK operation src: /172.16.30.138:50531  <http://172.16.30.138:50531>  dest: /172.16.30.138:50010  <http://172.16.30.138:50010>
>
>
>
>         java.io.EOFException: while trying to read 65563 bytes
>
>
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockReceiver.java:408)
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(BlockReceiver.java:452)
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:511)
>
>
>
>
>
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:748)
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:462)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java