By default, Encryption Management Server allows a maximum of 400 concurrent client connections.
In a large environment, with many clients trying to connect to Encryption Management Server at the start of each working day, errors such as the following may appear in the Encryption Desktop log:
08:42:56 PGP Error Sync with keys.example.com failed; server is unreachable
Note that this is the same error as appears if the client has no network connectivity to Encryption Management Server. Note too that the end user will not be notified of this error.
To verify that too many concurrent client connections are trying to connect to the server, ssh to Encryption Management Server and search for MaxRequestWorkers errors:
grep 'server reached MaxRequestWorkers setting' /var/log/httpd/error_log
Symantec Encryption Management Server release 10.5 and above.
To double the maximum concurrent client connections from 400 to 800, ssh to the server and run the following command:
sed -i 's|400</httpd-max-clients|800</httpd-max-clients|' /etc/ovid/prefs.xml
Then restart Apache:
If errors relating to MaxRequestWorkers still appear in /var/log/httpd/error_log then please open a technical support case.