Cron hanging

[ericovk]

A cron job of one of the users had been hanging for 2 weeks. It's a bit of a difficult situation, as the server is serving a Magento webshop and sales are depending on the cron.

The only rule I can find in all of my /var/log/cron* files is this:

cron-20161204:Nov 30 19:49:01 c6 crond[2171]: (<user>) RELOAD (/var/spool/cron/<user>)

This log is from the day before the cron got stuck. How can I find the cause of this "hanging" cron?

 

[Richard G]

Difficult. Could even be issues in the Magento database. Seems to happen more often with Magento.
I'm no specialist either but maybe this will give you some insight?
http://magento.stackexchange.com/questions/68899/cron-constantly-running
it also gives a tip about using strace.