On PBA-E 5.5 for Windows installation xmlrpcd container crashes regularly with no obvious reason.
Issue caused by the Bug in the Product library and occurs under heavy load for the xmlrpcd container, i.e. when some external XML API calls are massively executed.
To verify the issue it is necesary to open PBA-E xmlrpcd container's log and check if there is any certain method is called constantly.
The issue will be fixed in one of the future updates to PBA-E.
As a workaround Provider may calculate time required for complete execution of a single XML API call and configure external system to send API calls one by one with safe time interval in between.