Re: Master Process Reaping Worker with No message

[Aakash Gupta <aakash.gupta96@outlook.com>]

Thank a lot Eric. 
I am using Ruby 2.3.3 and Unicorn 5.3. 

"It sounds like somebody else is sending SIGKILL to a worker..." This line of yours saved my server. 

Actually when I uploads a file, it first goes to /tmp directory and then one of the worker processes of unicorn uploads it to S3 from there. So, earlier when I was trying to fix timeout connection error of unicorn, I increased it to 20 minutes and the problem was solved temporarily. 

But the problem was that the files that were uploaded temporarily to /tmp directory, those files do not get deleted from /tmp after they are uploaded to S3. So, I wrote a script using tmpreaper that cleans the /tmp directory recursively and removes the files that are 30 min older and added that to cron service. 

After this, as a result of this script, all the files that were required to be removed, were removed from /tmp directory but again a problem occurred. When I used "df -h" command to check whether the files are actually deleted or not, it showed that the space that was taken by uploaded files on my disk has not been freed :( . So, I searched internet and got to know that any other process was still using those files, that was why the space on the disk was not freed. 

I used ' lsof +L1 | grep "deleted" ' command and found that a process named 'bundle' is still using these deleted files. So, I again wrote a script that was killing the process that was using a deleted file.  Script was using this command

" lsof +L1 | grep 'deleted' | awk '{print $2}' | xargs kill -9 "

Today, after reading your words, I finally realised that my script was killing the unicorn worker itself because the command that I was using was killing the parent of "bundle" process. As "bundle" was a child of Unicorn worker, unicorn worker was being killed.

So, thanks a lot Eric :) 

I was finally able to solve this error because of the direction and hint that you gave me. But the only thing that I need to find is that what is causing uploaded files to persist in /tmp directory.