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Posted to log4cxx-user@logging.apache.org by Mike SG <mi...@yahoo.com> on 2004/09/10 22:46:21 UTC
Question regarding FileAppender...
Hi,
I compiled successfully the log4cxx on solaris and I am trying to run a small example which uses FileAppender. Our project is a multi process system. So I created a small example which has 2 processes writing to a file. I used the FileAppender for this. But when I see the output I see that it not process safe. The output is mixed up. Does this works only for threads in a single application.
Have I done something wrong? Can I use fileappender in a multiprocess application? Do I need to set something?
What options do I have?
Can somebody please help me on this.
Thanks a lot,
-Mike.
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Re: Question regarding FileAppender...
Posted by Mike SG <mi...@yahoo.com>.
Renny & Christophe,
Thanks for the information.
-Mike
Christophe de VIENNE <cd...@alphacent.com> wrote:
Mike SG wrote:
> Have I done something wrong? Can I use fileappender in a multiprocess
> application? Do I need to set something?
>
> What options do I have?
>
The simplest option you have is to use simplesocketserver from the
package. In your application send all the logs to a socket appender
which send you log events to a simple server, which itself send
everything to FileAppender.
The final output should be the one you expect.
Regards,
Christophe
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Re: Question regarding FileAppender...
Posted by Christophe de VIENNE <cd...@alphacent.com>.
Mike SG wrote:
> Have I done something wrong? Can I use fileappender in a multiprocess
> application? Do I need to set something?
>
> What options do I have?
>
The simplest option you have is to use simplesocketserver from the
package. In your application send all the logs to a socket appender
which send you log events to a simple server, which itself send
everything to FileAppender.
The final output should be the one you expect.
Regards,
Christophe
Re: Question regarding FileAppender...
Posted by Mike SG <mi...@yahoo.com>.
Thanks Arnold for the information.
-Mike.
Curt Arnold <ca...@apache.org> wrote:
log4cxx follows log4j and log4j does not attempt to synchronize file
I/O across multiple processes. This is addressed in Chapter 10 of "The
complete manual log4j".
Q 10.3 Can multiple Java Virtual Machines log to the same file using
log4j?
No, there is no way for log4j to coordinate the access for a system
resource, for example a file, between multiple JVMs....
The following FAQ describes the common method of addressing situations
where that is necessary by using SocketAppenders and a daemon that
receives the log requests and writes to a file:
http://logging.apache.org/log4j/docs/faq.html#3.3
On Sep 10, 2004, at 3:46 PM, Mike SG wrote:
> Hi,
>
> I compiled successfully the log4cxx on solaris and I am trying to run
> a small example which uses FileAppender. Our project is a multi
> process system. So I created a small example which has 2 processes
> writing to a file. I used the FileAppender for this. But when I see
> the output I see that it not process safe. The output is mixed up.
> Does this works only for threads in a single application.
>
> Have I done something wrong? Can I use fileappender in a multiprocess
> application? Do I need to set something?
>
> What options do I have?
>
> Can somebody please help me on this.
>
> Thanks a lot,
>
> -Mike.
>
> Do you Yahoo!?
> Yahoo! Mail Address AutoComplete - You start. We finish.
---------------------------------
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Re: Question regarding FileAppender...
Posted by Curt Arnold <ca...@apache.org>.
log4cxx follows log4j and log4j does not attempt to synchronize file
I/O across multiple processes. This is addressed in Chapter 10 of "The
complete manual log4j".
Q 10.3 Can multiple Java Virtual Machines log to the same file using
log4j?
No, there is no way for log4j to coordinate the access for a system
resource, for example a file, between multiple JVMs....
The following FAQ describes the common method of addressing situations
where that is necessary by using SocketAppenders and a daemon that
receives the log requests and writes to a file:
http://logging.apache.org/log4j/docs/faq.html#3.3
On Sep 10, 2004, at 3:46 PM, Mike SG wrote:
> Hi,
>
> I compiled successfully the log4cxx on solaris and I am trying to run
> a small example which uses FileAppender. Our project is a multi
> process system. So I created a small example which has 2 processes
> writing to a file. I used the FileAppender for this. But when I see
> the output I see that it not process safe. The output is mixed up.
> Does this works only for threads in a single application.
>
> Have I done something wrong? Can I use fileappender in a multiprocess
> application? Do I need to set something?
>
> What options do I have?
>
> Can somebody please help me on this.
>
> Thanks a lot,
>
> -Mike.
>
> Do you Yahoo!?
> Yahoo! Mail Address AutoComplete - You start. We finish.