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HDFS, mail # user - Re: Hint on EOFException's on datanodes


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Re: Hint on EOFException's on datanodes
Azuryy Yu 2013-05-24, 11:36
maybe network issue, datanode received an incomplete packet.

--Send from my Sony mobile.
On May 24, 2013 1:39 PM, "Stephen Boesch" <[EMAIL PROTECTED]> wrote:

>
> On a smallish (10 node) cluster with only 2 mappers per node after a few
> minutes EOFExceptions are cropping up on the datanodes: an example is shown
> below.
>
> Any hint on what to tweak/change in hadoop / cluster settings to make this
> more happy?
>
>
> 2013-05-24 05:03:57,460 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode
> (org.apache.hadoop.hdfs.server.datanode.DataXceiver@1b1accfc): writeBlock
> blk_7760450154173670997_48372 received exception java.io.EOFException:
> while trying to read 65557 bytes
> 2013-05-24 05:03:57,262 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode (PacketResponder 0 for
> Block blk_-3990749197748165818_48331): PacketResponder 0 for block
> blk_-3990749197748165818_48331 terminating
> 2013-05-24 05:03:57,460 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode
> (org.apache.hadoop.hdfs.server.datanode.DataXceiver@1b1accfc):
> DatanodeRegistration(10.254.40.79:9200,
> storageID=DS-1106090267-10.254.40.79-9200-1369343833886, infoPort=9102,
> ipcPort=9201):DataXceiver
> java.io.EOFException: while trying to read 65557 bytes
>         at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockReceiver.java:268)
>         at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(BlockReceiver.java:312)
>         at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:376)
>         at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:532)
>         at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:406)
>         at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:112)
>         at java.lang.Thread.run(Thread.java:662)
> 2013-05-24 05:03:57,261 INFO org.apache.hadoop.hdfs.server.datanode.Dat
>