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From "Uma Maheswara Rao G (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5839) Backup master not starting up due to Bind Exception while starting HttpServer
Date Fri, 20 Apr 2012 06:21:37 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13258044#comment-13258044
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Uma Maheswara Rao G commented on HBASE-5839:
--------------------------------------------

bq. Even before that the Data Xceviers threads (IPC handlers) are started and they are started
at random port.

DataXceiver server will listen on fixed port, 50010.

Clients only will bind to random ports for short term. Even I have seen this situations some
times in my clusters. 

We followed to set the fixed ports of servers at range of ~65000. It may just reduce the probability
of clients to binding on the same ports. As per our observations, that random ports did not
reach to this level. Not sure, is there any specific range for random ports.

This problem may be unavoidable problem. Restart servers only the option. Let's see if anyone
has some better idea to avoid this situation.
                
> Backup master not starting up due to Bind Exception while starting HttpServer
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-5839
>                 URL: https://issues.apache.org/jira/browse/HBASE-5839
>             Project: HBase
>          Issue Type: Bug
>            Reporter: ramkrishna.s.vasudevan
>             Fix For: 0.96.0, 0.94.1
>
>
> Backup master tries to bind to the info port 60010.
> This is done once the back up master becomes active.  Even before that the Data Xceviers
threads (IPC handlers) are started and they are started at random port.  If already 60010
is used then when standby master comes up then it fails due to bind exception.

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