![](https://img.laitimes.com/img/__Qf2AjLwojIjJCLyojI0JCLicmbw5iN1EjZmhzYygDOiN2N2UWYlBDM0UWOzIGMkRDNjRmNk9CX5d2bs92Yl1iclB3bsVmdlR2LcNWaw9CXt92Yu4GZjlGbh5yYjV3Lc9CX6MHc0RHaiojIsJye.png)
in the runtime, for a given service, ONLY exactly one system alias will be chosen.
The logic is, firstly all configured system alias will be retrieved together:
And if none of those alias is marked as default, exception will be raised;
If multiple have default maintained, only THE FIRST one will be returned ( line 29~31 )
This is the reason if I try to search one Opp with description QHD ( which is actually created in system QHD ) in gateway system which have configured both QHA and QHD as default but QHA is the first one, no result will be returned.
Just simply because gateway only issues a backend request to QHA, but not for QHD.