Assume that you use Microsoft BizTalk Server 2013 R2 or BizTalk Server 2013 and that you use a WCF-BasicHttp send port to communicate with an external web service. In this scenario, if the web service returns an incorrect response (for example, an incorrect ContentType element), the WCF-BasicHttp send port instance remains in an "Active" state instead of being suspended as expected.
Note This is likely to cause a build-up in the MsgBox container. This in turn causes throttling and performance issues.
Cumulative update information
BizTalk Server 2013 R2
This issue was first fixed in the following cumulative update for BizTalk Server 2013 R2:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the service packs and cumulative update list for BizTalk Server, see KB 2555976: Service pack and cumulative update list for BizTalk Server.
For more information about BizTalk Server hotfixes, see KB 2003907: Information about BizTalk hotfixes and cumulative update support.