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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3934) duplicative dfs_hosts entries handled wrong
Date Fri, 24 May 2013 18:50:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HDFS-3934:
---------------------------------------

    Attachment: HDFS-3934.016.patch

* Fix a place in {{TestDatanodeRegistration}} where we created a mock datanode that returned
0 for its xferPort.  Since we're asserting on this now, we need to return a legal port value
here.

* Looks like {{DFS_DATANODE_IPC_ADDRESS_DEFAULT}} has been wrong all along (the colon is missing),
but we never noticed because we never tried to parse it as a host:port until now.  So let's
fix {{DFS_DATANODE_IPC_ADDRESS_DEFAULT}}.
                
> duplicative dfs_hosts entries handled wrong
> -------------------------------------------
>
>                 Key: HDFS-3934
>                 URL: https://issues.apache.org/jira/browse/HDFS-3934
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.1-alpha
>            Reporter: Andy Isaacson
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>         Attachments: HDFS-3934.001.patch, HDFS-3934.002.patch, HDFS-3934.003.patch, HDFS-3934.004.patch,
HDFS-3934.005.patch, HDFS-3934.006.patch, HDFS-3934.007.patch, HDFS-3934.008.patch, HDFS-3934.010.patch,
HDFS-3934.011.patch, HDFS-3934.012.patch, HDFS-3934.013.patch, HDFS-3934.014.patch, HDFS-3934.015.patch,
HDFS-3934.016.patch
>
>
> A dead DN listed in dfs_hosts_allow.txt by IP and in dfs_hosts_exclude.txt by hostname
ends up being displayed twice in {{dfsnodelist.jsp?whatNodes=DEAD}} after the NN restarts
because {{getDatanodeListForReport}} does not handle such a "pseudo-duplicate" correctly:
> # the "Remove any nodes we know about from the map" loop no longer has the knowledge
to remove the spurious entries
> # the "The remaining nodes are ones that are referenced by the hosts files" loop does
not do hostname lookups, so does not know that the IP and hostname refer to the same host.
> Relatedly, such an IP-based dfs_hosts entry results in a cosmetic problem in the JSP
output:  The *Node* column shows ":50010" as the nodename, with HTML markup {{<a href="http://:50075/browseDirectory.jsp?namenodeInfoPort=50070&amp;dir=%2F&amp;nnaddr=172.29.97.196:8020"
title="172.29.97.216:50010">:50010</a>}}.

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