A SEP would repeatedly output start transaction errors:

230327 13554149 524498 MYREGION CASXO0003S Resource Manager for resource ORA1 Transaction start failed: reason -00006 13:55:41
230327 13554150 524498 MYREGION CASXO0003S Resource Manager for resource ORA1 Transaction start failed: reason -00006 13:55:41
230327 13554150 524498 MYREGION CASXO0003S Resource Manager for resource ORA1 Transaction start failed: reason -00006 13:55:41
230327 13554151 524498 MYREGION CASXO0003S Resource Manager for resource ORA1 Transaction start failed: reason -00006 13:55:41
230327 13554151 524498 MYREGION CASXO0003S Resource Manager for resource ORA1 Transaction start failed: reason -00006 13:55:41

when a Oracle XA connection was interrupted.

Full article: https://portal.microfocus.com/s/article/KM000015894