We are using GMS 14.2.1. build 270 on SLES12-SP2 and Groupwise 14.2.1 R2 build 125534. Everyting worked fine until yesterday. Sync stopped with full var partition. After deleting the nearly 6GB sized groupwise-agent.log file and restart of gms sync started again sycessfully with a very fast growing log file.

2017-01-10 10:58:06.523 ERROR [GALMonitor_Thread] [gwsoap:476] [userID:] [eventID:] [objectID:] [SOAPRequest] SOAP failure/exception. More than likely a web server failure. Result: <?xml version="1.0" encoding="UTF-8"?> ....
2017-01-10 10:58:06.524 ERROR [GALMonitor_Thread] [gal:277] [userID:] [eventID:] [objectID:] [GALMonitor] Exception processing SAB deltas for gwid: NA. Exception: Start tag expected, '<' not found, line 1, column 1
2017-01-10 10:58:06.548 ERROR [GALMonitor_Thread] [gwsoap:351] [userID:] [eventID:] [objectID:] [] Could not get status for result: getDeltasResponse = None [ObjectifiedElement]

Stopping gms results in a continuously working datasync connector manager. To stop filling the log file with above alerts connector manager has to be killed.