logrotate, httpd and piping messages to java program

[Milind Vaidya <kavadsa@xxxxxxxxx>]

Hi

 

I asked following question few days ago:

I am writing messages to error_log file as well as sending to std out.

The setting looks like 

ErrorLog  "| /usr/bin/tee -a /var/log/httpd/error_log |  java -cp producer.jar stdin.producer.StdInProducer /CustomProducer/config.json >> /producer_init.log 2>&1"`

When httpd is started it spawns 2 processes and adds one every one hour, keeping all alive

Only other thing happening per hour is rotation of error_log file by logrotate with copytruncate option (which copies the file data and truncates original file keeping the file descriptor unchanged )

I also tested it with another program with setting as follows which runs fine

ErrorLog  "| /usr/bin/tee -a /var/log/httpd/error_log | /usr/bin/logger -u /tmp/apache_log.socket"

I got answer to that indicating me to terminate the program after program encounters EOF. I did that and it was running for a while. Now I see that the java program which is supposed to end and start every hour when the logrotate - copytruncate command runs, it is not happening so. It has been running for more than few days now. So I am wondering is there anything wrong in what I am doing ? There is not error as such, but the behaviour changed from last time and the earlier one was desired one. The logrotate is working fine and cutting the file every hour without any problem. So I was wondering what is happening here ? Is EOF missing or it is not being treated properly over piping ? Any pointers ?