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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DIRSERVER-1790) When we restart the server, some user index are lost
Date Wed, 16 Jan 2013 10:36:14 GMT

    [ https://issues.apache.org/jira/browse/DIRSERVER-1790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13554912#comment-13554912
] 

Emmanuel Lecharny commented on DIRSERVER-1790:
----------------------------------------------

Ok, I think the pb occurs when the server is shutdown 'brutally'. 

We have a shutdown hook in the server, which flush all the partitions on disk when the server
is shutdown using a kill -TERM or a ^C. It's called, and in this case, all the *.db files
are correctly created and filled. Otherwise, doing a kill -9 will let the index in a intermediate
state, where the *.lg files contain all the updates, but the *.db files all have a 0 size.

A workaround for the moment is to be sure to correctly stop the server using a kill -TERM
on linux, or when stopping the server.

Still, we should periodically flush the journal files (*.lg) so that the data files (*.db)
are updated, and more important, detect that we are in a transient state when the server is
started, and update the data files, applying the journal on them. This would solve the pb
we will face in case of a server crash. This is definitively needed.
                
> When we restart the server, some user index are lost
> ----------------------------------------------------
>
>                 Key: DIRSERVER-1790
>                 URL: https://issues.apache.org/jira/browse/DIRSERVER-1790
>             Project: Directory ApacheDS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-M9
>            Reporter: Emmanuel Lecharny
>            Assignee: Emmanuel Lecharny
>            Priority: Blocker
>             Fix For: 2.0.0-M10
>
>
> Indexes are not anymore used when the server is restarted. The index was available when
the server was started the first time, then after a restart, even if the index exists on disk,
it's not anymore used by the server, causing a full scan to be done.

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