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https://issues.apache.org/jira/browse/HADOOP-5626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712859#action_12712859
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Todd Lipcon commented on HADOOP-5626:
-------------------------------------
The test failures are unrelated (job history and capacity scheduler, both
mapred whereas this only touches hdfs)
While I think the discussion above is valuable, since this blocks HADOOP-5888
I'd like for this to be committed and we can continue work on making image
transfer more sane in another JIRA.
As for switching to POST rather than the "GET with a callback to another GET",
I looked into this today and, while easy, I'm not sure it's a great idea. I
think there are some people who are relying on the GetImageServlet on the 2NN
for backup purposes, so removing the Jetty from the 2NN would break that.
> SecondaryNamenode may report incorrect info host name
> -----------------------------------------------------
>
> Key: HADOOP-5626
> URL: https://issues.apache.org/jira/browse/HADOOP-5626
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Carlos Valiente
> Assignee: Todd Lipcon
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: HADOOP-5626.patch, hadoop-5626.txt
>
>
> I have set up {{dfs.secondary.http.address}} like this:
> {code}
> <property>
> <name>dfs.secondary.http.address</name>
> <value>secondary.example.com:50090</value>
> </property>
> {code}
> In my setup {{secondary.example.com}} resolves to an IP address (say,
> 192.168.0.10) which is not the same as the host's name (as returned by
> {{InetAddress.getLocalHost().getHostAddress()}}, say 192.168.0.1).
> In this situation, edit log related transfers fail. From the namenode log:
> {code}
> 2009-04-05 13:32:39,128 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Roll Edit Log from
> 192.168.0.10
> 2009-04-05 13:32:39,168 WARN org.mortbay.log: /getimage: java.io.IOException:
> GetImage failed. java.net.ConnectException: Connection refused
> at java.net.PlainSocketImpl.socketConnect(Native Method)
> at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
> at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
> at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
> at java.net.Socket.connect(Socket.java:519)
> at java.net.Socket.connect(Socket.java:469)
> at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
> at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
> at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
> at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
> at sun.net.www.http.HttpClient.New(HttpClient.java:306)
> at sun.net.www.http.HttpClient.New(HttpClient.java:323)
> at
> sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:837)
> at
> sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:778)
> at
> sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:703)
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1026)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.getFileClient(TransferFsImage.java:151)
> ...
> {code}
> From the secondary namenode log:
> {code}
> 2009-04-05 13:42:39,238 ERROR
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode: Exception in
> doCheckpoint:
> 2009-04-05 13:42:39,238 ERROR
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode:
> java.io.FileNotFoundException:
> http://nn.example.com:50070/getimage?putimage=1&port=50090&machine=
> 192.168.0.1&token=-19:1243068779:0:1238929357000:1238929031783
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1288)
> at
> org.apache.hadoop.hdfs.server.namenode.TransferFsImage.getFileClient(TransferFsImage.java:151)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.putFSImage(SecondaryNameNode.java:294)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.doCheckpoint(SecondaryNameNode.java:333)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.run(SecondaryNameNode.java:239)
> at java.lang.Thread.run(Thread.java:619)
> {code}
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