[ https://issues.apache.org/jira/browse/HADOOP-10216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
MaoYuan Xian resolved HADOOP-10216. ----------------------------------- Resolution: Invalid > Unnecessary disk check triggered when socket operation has problem. > ------------------------------------------------------------------- > > Key: HADOOP-10216 > URL: https://issues.apache.org/jira/browse/HADOOP-10216 > Project: Hadoop Common > Issue Type: Improvement > Components: fs > Affects Versions: 1.1.2 > Reporter: MaoYuan Xian > > When BlockReceiver transfer data fails, it can be found SocketOutputStream > translates the exception as IOException with the message "The stream is > closed": > 2014-01-06 11:48:04,716 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: > IOException in BlockReceiver.run(): > java.io.IOException: The stream is closed > at org.apache.hadoop.net.SocketOutputStream.write > at java.io.BufferedOutputStream.flushBuffer > at java.io.BufferedOutputStream.flush > at java.io.DataOutputStream.flush > at > org.apache.hadoop.hdfs.server.datanode.BlockReceiver$PacketResponder.run > at java.lang.Thread.run > Which makes the checkDiskError method of DataNode called and triggers the > disk scan. > Can we make the modifications like below in checkDiskError to avoiding this > unneccessary disk scan operations?: > {code} > --- a/src/hdfs/org/apache/hadoop/hdfs/server/datanode/DataNode.java > +++ b/src/hdfs/org/apache/hadoop/hdfs/server/datanode/DataNode.java > @@ -938,7 +938,8 @@ public class DataNode extends Configured > || e.getMessage().startsWith("An established connection was > aborted") > || e.getMessage().startsWith("Broken pipe") > || e.getMessage().startsWith("Connection reset") > - || e.getMessage().contains("java.nio.channels.SocketChannel")) { > + || e.getMessage().contains("java.nio.channels.SocketChannel") > + || e.getMessage().startsWith("The stream is closed")) { > LOG.info("Not checking disk as checkDiskError was called on a network" > + > " related exception"); > return; > {code} -- This message was sent by Atlassian JIRA (v6.1.5#6160)