Summary
Web filter logs being inundated with hundreds of requests for mtalk.google.com as a result of a known Google Chrome browser bug.
Problem
The web filter logs are receiving hundreds of requests for mtalk.google.com, causing the log disk space to run out.
This is caused by a known bug in the Google Chrome browser. If you are running Chrome v.35 with Hangouts (this is running by default and cannot be removed or disabled) you will see this issue.
Solution
This is a known bug with Chrome 35. Please see https://code.google.com/p/chromium/issues/detail?id=373181
This issue is resolved in Chrome 36 onwards, we recommend updating to a version post this release.