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From James Stauffer <stauffer.ja...@gmail.com>
Subject Re: RollingFileAppender when running out of disk-space
Date Mon, 07 Mar 2005 13:48:17 GMT
Since this is even a problem I have to wonder if you are logging too
much or running with too little disk space?

You could also log to a Database.

On Mon, 07 Mar 2005 17:47:52 +1100, Andreas Knecht
<andreask@objectconsulting.com.au> wrote:
> Hello everyone,
> 
> we have recently encountered a problem with log4j, when we run out of
> disk-space on one of our production servers.  It causes slowdowns in the
> particular web application that we do the logging for.  We have actually
> observed this happen live, and are quite sure that it is caused by log4j.
> 
> Now the simple solution would obviously be to clean out old log files
> regularly, or setup a script to do this, to prevent the server from
> running out of disk space.  Unfortunately we do not have access rights
> to these production boxes to do this, and there's a very large number of
> web applications deployed.  The system administrators we go through
> don't have time to setup scripts for cleaning out old log files, or to
> clean out old log files manually.
> 
> Currently I've been looking at several options to work around this:
> 1.) We could implement an AsyncAppender.  However I don't believe that
> this will solve the slowdown issues, since the log4j documentation
> mentions that if the buffer fills up, the append() method will block.
> I'm guessing that this will happen if we run out of DiskSpace, and the
> attached FileAppender will get into problems.  I've however not tried
> this in practice.
> 2.) Use a SocketAppender to log all the output to:
>     a.) a different server.
>     b.) locally, which should still have the effect of doing the logging
> asynchronously.
>     The log4j documentation is somewhat ambiguous when it comes to
> describing the blocking behaviour of the SocketAppender.  According to
> the documentation, 'if the remote server is down or unreachable, the
> logging events will simply be dropped.' Further down however it
> mentions: 'where the network link to the server is down, the client will
> eventually be blocked.'
> 
> What we need is a solution that once we run out of disk-space on the
> server, will simply drop all logging statements until more disk-space is
> added without causing any slowdown in the application.  Alternatively,
> we could consider setting up a server simply for logging purposes,
> however we do not want our web-app to slow down, if we can't reach this
> logging server for any reason either.
> 
> Does anyone have suggestions as to how this can be achieved?
> 
> Regards,
>    Andreas
> 
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> 


-- 
James Stauffer
http://www.geocities.com/stauffer_james/

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