Squid proxy hanging issue: Max File Descriptors fixed

We faced a squid proxy hanging issue at our office network. We restarted squid and it started working fine, but the issue came back after few days.

Here is the Details of the issue, and how it was fixed:

/etc/squid/cache.log shows:

#vi /var/log/squid/cache.log

2016/10/14 05:47:08 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:47:24 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:47:52 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:49:20 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:49:36 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:49:52 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:50:08 kid1| WARNING! Your cache is running out of filedescriptors
2016/10/14 05:51:56 kid1| WARNING! Your cache is running out of filedescriptors

Solution:

The solution to the issue was to increase squid max file descriptors

To increase the squid MAX FILE DESCRIPTORS:

vi /etc/conf.d/squid

# Max. number of filedescriptors to use. You can increase this on a busy
# cache to a maximum of (currently) 8192 filedescriptors. Default is 1024.
SQUID_MAXFD=16384

Then restart the squid to fix the issue permanently

#/etc/init.d/squid restart