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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2006/07/26 14:14:14 UTC
[jira] Resolved: (HADOOP-375) Introduce a way for datanodes to
register their HTTP info ports with the NameNode
[ http://issues.apache.org/jira/browse/HADOOP-375?page=all ]
Doug Cutting resolved HADOOP-375.
---------------------------------
Fix Version/s: 0.5.0
Resolution: Fixed
I just committed this. Thanks!
> Introduce a way for datanodes to register their HTTP info ports with the NameNode
> ---------------------------------------------------------------------------------
>
> Key: HADOOP-375
> URL: http://issues.apache.org/jira/browse/HADOOP-375
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.5.0
> Reporter: Devaraj Das
> Assigned To: Devaraj Das
> Fix For: 0.5.0
>
> Attachments: c.patch, content_browsing.new.patch, content_browsing.new.patch, content_browsing.new.patch
>
>
> If we have multiple datanodes within a single machine the Jetty servers (other than the first one) won't be able to bind to the fixed HTTP port. So, one solution is to have the datanodes pick a free port (starting from a configured port value) and then inform namenode about it so that the namenode can then do redirects, etc.
> Johan Oskarson reported this problem.
> If a computer have a second dfs data dir in the config it doesn't start properly because of:
> Exception in thread "main" java.io.IOException: Problem starting http server
> at org.apache.hadoop.mapred.StatusHttpServer.start(StatusHttpServer.java:182)
> at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:170)
> at org.apache.hadoop.dfs.DataNode.makeInstanceForDir(DataNode.java:1045)
> at org.apache.hadoop.dfs.DataNode.run(DataNode.java:999)
> at org.apache.hadoop.dfs.DataNode.runAndWait(DataNode.java:1015)
> at org.apache.hadoop.dfs.DataNode.main(DataNode.java:1066)
> Caused by: org.mortbay.util.MultiException[java.net.BindException: Address already in use]
> at org.mortbay.http.HttpServer.doStart(HttpServer.java:731)
> at org.mortbay.util.Container.start(Container.java:72)
> at org.apache.hadoop.mapred.StatusHttpServer.start(StatusHttpServer.java:159)
> ... 5 more
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