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E-IB: Get "Integration Gateway - External System Contact Error (158,10721)" + "IOException: The host couldn't be resolved" with Unexpectedly Empty URL Connector Property in Outbound Service Operations over HTTPTARGET Connector (Doc ID 873083.1)

Last updated on MARCH 29, 2019

Applies to:

PeopleSoft Enterprise PT PeopleTools - Version 8.48 to 8.54 [Release 8.4]
Information in this document applies to any platform.


On PeopleTools from 8.48 or later, an outbound service operation via HTTP Target Connector has in PRIMARYURL a proper and reachable URL value, but is consistently failing with the below errors:

Integration Gateway - External System Contact Error (158,10721) 

and in the error message parameter in the gateway error log, as well as in the response message's (IBInfo), this:

IOException: The host couldn't be resolved. 

Furthermore, essentially to the diagnosis, on inspecting the IBInfo parameters of the request message in the gateway log, it shows, in particular, the following:




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