[ https://issues.apache.org/jira/browse/HDFS-1332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13033368#comment-13033368 ]
Todd Lipcon commented on HDFS-1332: ----------------------------------- Just a sample of why this JIRA is important, from #hadoop IRC a minute ago: {code} 15:23 < user> Hi all. I have a strange problem - I can't seem to run a simple copyFromLocal command from my local machine, but everything works fine if i log into the master as the same user and issue command 15:25 < user> the error it throws is cryptic - java.io.IOException: File /foo/bar could only be replicated to 0 nodes, instead of 1 15:26 < user> i checked the namenode and tasktracker logs - nothing of interest there (except the error i mentioned, of course) {code} > When unable to place replicas, BlockPlacementPolicy should log reasons nodes > were excluded > ------------------------------------------------------------------------------------------ > > Key: HDFS-1332 > URL: https://issues.apache.org/jira/browse/HDFS-1332 > Project: Hadoop HDFS > Issue Type: Improvement > Components: name-node > Reporter: Todd Lipcon > Assignee: Ted Yu > Priority: Minor > Labels: newbie > Fix For: 0.23.0 > > Attachments: HDFS-1332.patch > > > Whenever the block placement policy determines that a node is not a "good > target" it could add the reason for exclusion to a list, and then when we log > "Not able to place enough replicas" we could say why each node was refused. > This would help new users who are having issues on pseudo-distributed (eg > because their data dir is on /tmp and /tmp is full). Right now it's very > difficult to figure out the issue. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira