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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3596) accumulo hangs in {{InetAddress#getByName}}
Date Sat, 14 Feb 2015 21:11:11 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321706#comment-14321706
] 

Eric Newton commented on ACCUMULO-3596:
---------------------------------------

Documenting it here and glibc's bug reporting site is sufficient.

I think the scope of who is impacted is much larger than the accumulo community.
Adding it to the accumulo user guide is not going to inform enough people.




> accumulo hangs in {{InetAddress#getByName}}
> -------------------------------------------
>
>                 Key: ACCUMULO-3596
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3596
>             Project: Accumulo
>          Issue Type: Bug
>          Components: master, tserver
>         Environment: large cluster
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>
> calls to importDirectory were hanging.  After some debugging, it was determined that
the imports were stuck waiting on DNS lookups.
> {{InetAddress#getByName}} calls {{gethostbyname_r}}
> Further, it was determined that the call only hangs if /etc/hosts.conf contains "reorder
on".
> A bug was found in this section of the glibc resolver, and a bug report will be made
to them.
> Workaround: turn off address reordering.
> Many thanks to [~bfloss] for finding this bug.



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