Business Services Server is Unavailable

When the Business Services Server is down, the Business Services Server log displays these messages:

4756/5824 WRK:Starting jdeCallObject                    Mon Nov 12 11:55:39.171089            XMLRequest.cpp1260
            ICU0000017 - ICU CodePage for 1252 is ibm-1252.
4756/5824 WRK:Starting jdeCallObject                    Mon Nov 12 13:03:06.734001            callsbfmsg.c311
            Error when sending JDENET message. JDENET Error = eConnectionFailed
4756/664 WRK:Starting jdeCallObject          Mon Nov 12 13:07:15.390053            XMLRequest.cpp1260
            ICU0000017 - ICU CodePage for 1252 is ibm-1252.
4756/664 WRK:Starting jdeCallObject          Mon Nov 12 13:08:24.453002            callsbfmsg.c311
            Error when sending JDENET message. JDENET Error = eConnectionFailed
4756/664 WRK:Starting jdeCallObject          Mon Nov 12 13:12:37.093001            callsbfmsg.c311
            Error when sending JDENET message. JDENET Error = eConnectionFailed
4756/664 WRK:Starting jdeCallObject          Mon Nov 12 13:15:09.546001            B953002.c367
            Internal Server Error during execution of Business Service.