Rotate Log Files - stdout.log & stderr.log

Question

Hi Folks,
Whats the best way to rotate stdout.log & stderr.log.
I am assuming that rolling of these files can not be configured using felix (please correct me if I am mistaken)
Please advice!
Thanks,
Adnan

Answer 1

Hi Adnan,
There is currently no way to rotate stdout.log and stderr.log. Therefore, if you want to preserve the stdout.log and stderr.log so that they do not get truncated after restart, add the following commands before any other command in the start script.
# Move stdout.log and stderr.log
mv ../logs/stdout.log ../logs/stdout_$(date +%Y-%m-%d-%H%M).log
mv ../logs/stderr.log ../logs/stderr_$(date +%Y-%m-%d-%H%M).log
Another possible way is to disable the stdout.log and stderr.log entirely and instead output the information to the startup.log. Then you can rotate the startup.log instead.
a) To disable the stderr.log and stdout.log, i guess you can add these lines to your crx-quickstart/server/start script:
QUICKSTART_OPTS='-verbose -nobrowser'
export QUICKSTART_OPTS
b) To configure the path of the startup.log, you can add this to the start script as well (replace /path/to/startup.log with the path you would like the log to be written to instead):
CQ_LOG=/path/to/startup.log
export CQ_LOG
c) Then after doing this, there is a side effect that crx output will go to the startup.log as well. to fix this, do the following:
    1) Go to crx-quickstart/server/runtime/0/_crx/log4j.xml
    2) Comment out this element <appender-ref ref="console" /> from log4j.xml
<root>
<level value="info" />
<!-- appender-ref ref="console" /-->
<appender-ref ref="error" />
</root>
d) Also, now you would like to rotate the startup.log file:
"The file startup.log logs messages while the Servlet Engine starts. It is usually small, and you cannot configure it."
The startup log cannot be rotated with CQSE facilities. Please note that logs under /server is rotated at operating system level,
for more info see http://httpd.apache.org/docs/2.0/programs/rotatelogs.html
Unix workaround :
in serverctl script, replace the line :
exec $jvmExe >> "$CQ_LOG" 2>&1
by : 
exec $jvmExe | /usr/sbin/rotatelogs "$CQ_LOG.%Y%m%d" 86400 >> /dev/null 2>&1
If this doesn't seem to work, then try
exec $jvmExe 2>&1 | /usr/sbin/rotatelogs "$CQ_LOG.%Y%m%d" 86400
Unfortunately, I did not found any workaround for windows system.
Hope this helps.
Thanks,
Varun