Symptoms

• The Cache Statistics page in Confluence Administration > Cache Management appears to be empty:

• The following appears in the atlassian-confluence.log:

2014-06-19 22:49:09,332 ERROR [http-bio-8552-exec-6] [common.error.jersey.ThrowableExceptionMapper] toResponse Uncaught exception thrown by REST service: Multiple decimal separators in pattern "###.###.###.###.###"
 -- referer: http://localhost:8552/admin/cache/showStatistics.action | url: /rest/cacheManagement/1.0/stats | userName: admin
java.lang.IllegalArgumentException: Multiple decimal separators in pattern "###.###.###.###.###"

Cause

The number format under Confluence Admin > General Configuration > Formatting and International Settings is configured incorrectly.                                   

Resolution

Under Formatting and International Settings, revert the number format back to the default setting:

1. Go to Confluence Admin >  General Configuration > Formatting and International Settings                                      
2. Reconfigure the "Long Number Format" and "Decimal Number Format" back to the default, as shown below: