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Date: Wed, 7 Dec 2011 07:20:40 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-4936) Cached HRegionInterface connections
 crash when getting UnknownHost exceptions
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    [ https://issues.apache.org/jira/browse/HBASE-4936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13164203#comment-13164203 ] 

Hudson commented on HBASE-4936:
-------------------------------

Integrated in HBase-TRUNK #2523 (See [https://builds.apache.org/job/HBase-TRUNK/2523/])
    HBASE-4936 Cached HRegionInterface connections crash when getting UnknownHost exceptions

stack : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java

                
> Cached HRegionInterface connections crash when getting UnknownHost exceptions
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-4936
>                 URL: https://issues.apache.org/jira/browse/HBASE-4936
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.92.0
>            Reporter: Andrei Dragomir
>            Assignee: Andrei Dragomir
>             Fix For: 0.94.0
>
>         Attachments: HBASE-4936-v2.patch, HBASE-4936.patch
>
>
> This isssue is unlikely to come up in a cluster test case. However, for development, the following thing happens: 
> 1. Start the HBase cluster locally, on network A (DNS A, etc)
> 2. The region locations are cached using the hostname (mycomputer.company.com, 211.x.y.z - real ip)
> 3. Change network location (go home)
> 4. Start the HBase cluster locally. My hostname / ips are not different (mycomputer, 192.168.0.130 - new ip)
> If the region locations have been cached using the hostname, there is an UnknownHostException in CatalogTracker.getCachedConnection(ServerName sn), uncaught in the catch statements. The server will crash constantly. 
> The error should be caught and not rethrown, so that the cached connection expires normally. 

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