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From "Fredrik Hedberg (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1638) Master node unable to bind to DNS hostname
Date Fri, 20 Jul 2007 23:21:06 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12514370
] 

Fredrik Hedberg commented on HADOOP-1638:
-----------------------------------------

There doesn't seem to be much action around HADOOP-1202, but it should make this a non-issue.

> Master node unable to bind to DNS hostname
> ------------------------------------------
>
>                 Key: HADOOP-1638
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1638
>             Project: Hadoop
>          Issue Type: Bug
>          Components: contrib/ec2
>    Affects Versions: 0.13.0, 0.13.1, 0.14.0, 0.15.0
>            Reporter: Stu Hood
>            Priority: Minor
>             Fix For: 0.13.1, 0.14.0, 0.15.0
>
>         Attachments: hadoop-1638.patch
>
>
> With a release package of Hadoop 0.13.0 or with latest SVN, the Hadoop contrib/ec2 scripts
fail to start Hadoop correctly. After working around issues HADOOP-1634 and HADOOP-1635, and
setting up a DynDNS address pointing to the master's IP, the ec2/bin/start-hadoop script completes.
> But the cluster is unusable because the namenode and tasktracker have not started successfully.
Looking at the namenode log on the master reveals the following error:
> {quote}
> 2007-07-19 16:54:53,156 ERROR org.apache.hadoop.dfs.NameNode: java.net.BindException:
Cannot assign requested address
>         at sun.nio.ch.Net.bind(Native Method)
>         at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
>         at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
>         at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:186)
>         at org.apache.hadoop.ipc.Server.<init>(Server.java:631)
>         at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:325)
>         at org.apache.hadoop.ipc.RPC.getServer(RPC.java:295)
>         at org.apache.hadoop.dfs.NameNode.init(NameNode.java:164)
>         at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:211)
>         at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:803)
>         at org.apache.hadoop.dfs.NameNode.main(NameNode.java:811)
> {quote}
> The master node refuses to bind to the DynDNS hostname in the generated hadoop-site.xml.
Here is the relevant part of the generated file:
> {quote}
> <property>
>   <name>fs.default.name</name>
>   <value>blah-ec2.gotdns.org:50001</value>
> </property>
> <property>
>   <name>mapred.job.tracker</name>
>   <value>blah-ec2.gotdns.org:50002</value>
> </property>
> {quote}
> I'll attach a patch against hadoop-trunk that fixes the issue for me, but I'm not sure
if this issue is something that someone can fix more thoroughly.

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