Thanks!

@ss-gxp It doesn't work correct. Build log is not fully save( I reverted changes from master branch

Are there any details?
The problem does not appear in my case.
We can assume that saving in the destructor does not work, but not in my case. I'm using crontab to start builds. Since Beanstalkd did not check, this is not your case? Perhaps need forced flush when build done.

(Also I can say that about 22 thousand lines of the log were written about two and a half hours. With a patch in one second.)

Added unset log handler to destruct and flush data.
Can you test?

Yes, I use worker. I will check it tonight. Thank you.