Timeout errors/ERR_CONNECTION_TIMED_OUT searching OPAC

Description

Though OPAC searching is generally working OK, the following errors are seen periodically for certain users:

  This site can’t be reached 
  <DNS or hostname> took too long to respond. 
  ...
  ERR_CONNECTION_TIMED_OUT 

An examination of the www_server log shows that the particular transactions which get this error are *not* reaching the www_server:  there is *no* entry in the www_server log for this PC's IP address during this time period.
 

Resolution

This PC had Avast Endpoint Protection software on it.  Adding the hostname and IP address of the server to the Avast list of Allowed sites corrected the problem. (There's no reason to believe that the same wouldn't be seen with other "endpoint protection"/security software and that the same addition to the Allowed sites would be required.)

• Article last edited: 3-Aug-2016