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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1292) Tablet constructor can hang on vfs classloader, preventing tablets from loading
Date Tue, 14 May 2013 20:23:17 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657456#comment-13657456
] 

Keith Turner commented on ACCUMULO-1292:
----------------------------------------

bq. Is that code synchronized somewhere? I traced it back and I don't see how that code can
only be hit once at a time.

There is one thread in the tablet server that processes loading tablet.  See ACCUMULO-1085
for discussion on why it needs to be one thread in 1.5.

bq. Furthermore, I'm still struggling to understand how the classpath config could cause hanging.

I do not remember the specifics.  I think it comes down to doing some sort of I/O through
VFS and the possibility that the I/O could hang.
                
> Tablet constructor can hang on vfs classloader, preventing tablets from loading
> -------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-1292
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1292
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>            Reporter: John Vines
>            Assignee: Keith Turner
>             Fix For: 1.5.0
>
>
> Taken from TODO from r1424106 regarding ACCUMULO-867. This is something that we should
at least look into more before 1.5 is released.

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