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From "Marc Carrion" <mcarr...@opfactory.com>
Subject RE: problems using SocketAppender and AsyncAppender
Date Thu, 17 Jan 2002 12:06:02 GMT

  Any help on that?

  Thanks,
         Marc

---- Original Message ----
De: mcarrion@opfactory.com
Para: log4j-user@jakarta.apache.org, 
Asunto: RE: problems using SocketAppender and AsyncAppender
Fecha: Tue, 15 Jan 2002 11:23:57 +0100

>  Hello, we are using log4j in our application (configuring some
>socket appenders) and recently we had problems when one of the
>clients(chainsaw, logfactor5, ...) listening for logs hangs, the
>application blocks waiting for I/O. 
>
>  We found that the problem occurs because the client is blocked for
>I/O and then the socket blocks too, and due to, the main thread too.
>
>  Finally we decided to use the AsyncAppender, it should work
>asynchronous, it would use another thread to write so the main thread
>will never become blocked. But, if one of the SocketAppenders
>referenced in the AsyncAppender hangs, then it never write and the
>queue of events become full, so, the AsyncAppender blocks, and
>consecuently the main thread blocks waiting for I/O.
>
>  So, the AsyncAppender doesn't works asynchronous, it waits actively
>until the queue has more space.
>
>  Do anybody had the same problem? How did you solve it? Is it a
>known bug? Will it be solved?
>
>  Thanks,
>         Fernando & Marc
>
>
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