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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6943) [89-fb] Do not catch certain exceptions trying to get an RS connection
Date Thu, 04 Oct 2012 17:33:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469535#comment-13469535
] 

Phabricator commented on HBASE-6943:
------------------------------------

Kannan has added CCs to the revision "[jira] [HBASE-6943] [89-fb] Do not catch certain exceptions
trying to get an RS connection".
Added CCs: avf, adela, pritamdamania, aaiyer, nspiegelberg, amirshim, mycnyc

  Let's try to cc individually until we can figure out how to more easily email the group
automatically.

REVISION DETAIL
  https://reviews.facebook.net/D5877

To: Kannan, Liyin, Karthik, JIRA, mbautin
Cc: avf, adela, pritamdamania, aaiyer, nspiegelberg, amirshim, mycnyc

                
> [89-fb] Do not catch certain exceptions trying to get an RS connection
> ----------------------------------------------------------------------
>
>                 Key: HBASE-6943
>                 URL: https://issues.apache.org/jira/browse/HBASE-6943
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Mikhail Bautin
>         Attachments: D5877.1.patch
>
>
> When getting a regionserver connection in 0.89-fb in HBaseClient, we catch all types
of Throwable. I have observed a real case when the client looked stuck. On debugging it turned
out that a NoSuchMethodError was thrown and caught, leaving the connection in an inconsistent
state (initialized socket but null streams). All following attempts resulted in NPEs that
were also caught, and no errors were logged. From the user's perspective the client was just
stuck. The root cause was the absence of a required jar (hence the NoSuchMethodError) but
it was not reported properly.

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