using log4j to one logging file from more than one process

[Bartsch Axel <ax...@siemens.com>]

Hello,

I want to write into a logging file with log4j from an application that consists of 3 processes (=JAVA VMs).

Each process calls

String configFileName = "log.properties";
PropertyConfigurator.configure(configFileName);
tfl = Logger.getLogger("debug");

and then logs e.g. with
tfl.debug("hello");

The loggging file gets corrupted:
- each process writes into it, after a while 0Hex whitespace is added to the logging file
- there is output-process1, whitespace, output-process2, whitespace, output-process3, whitespace
- some trace outputs are missing
-timestamps start new with each output-processX

Is it possible to use log4j for wrting into the same file for multiple processes (=JAVA VMs).

Axel

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Re: using log4j to one logging file from more than one process

[Dennis Cook <de...@cook-mail.net>]

Here is one approach that might work.

If the three processes can be started by a single common java process, 
then you could use console appenders from those three processes and 
collect there entries in the starting process by intercepting their 
stdout and stderr streams; in turn writing to a file appender from that 
process.

On Jul 26, 2004, at 7:35 AM, Bartsch Axel wrote:

> Hello,
>
> I want to write into a logging file with log4j from an application 
> that consists of 3 processes (=JAVA VMs).
>
> Each process calls
>
> String configFileName = "log.properties";
> PropertyConfigurator.configure(configFileName);
> tfl = Logger.getLogger("debug");
>
> and then logs e.g. with
> tfl.debug("hello");
>
> The loggging file gets corrupted:
> - each process writes into it, after a while 0Hex whitespace is added 
> to the logging file
> - there is output-process1, whitespace, output-process2, whitespace, 
> output-process3, whitespace
> - some trace outputs are missing
> -timestamps start new with each output-processX
>
> Is it possible to use log4j for wrting into the same file for multiple 
> processes (=JAVA VMs).
>
> Axel
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
> For additional commands, e-mail: log4j-user-help@logging.apache.org
>
>


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