A security check was introduced in SourceForge 4.3 SP1 that will cause commits to fail if the system time differs too much between the Integration and Application server. This will also cause the Integration server to fail to connect to the Application server on the server status page. This behavior is controlled by the following setting in sourceforge.properties on the Integration server:
sfmain.integration.security.check_timestamp
When set to any non-zero number, this is the amount of lag allowed between the Integration and Application servers. To disable this behavior, set to 0.