2557773 - OData back end server returned HTTP code 400 to the client through the SAP cloud

Symptom

Application made several successful http requests using this url: http://xxx:443/sap/opu/odata//xxxx/xxxxx_SRV/
One request failed with this error:

2017-11-01 04:45:30 PM#WARNING#Proxy####1509534930102001#0ec92902aade4b78abb61ff9c3c1e8ef#scp.mshopqa#DirectProxy:fireRequest#S0018283790#######324446#####Finished sending request to back end http://xxx:443/sap/opu/odata//xxxxx/xxxxx_SRV//xxxxxxxCollection?$filter=LANGU+eq+'E' in 90 ms. HTTP status from the back end is 400.#2.0#2017-11-01 04:45:30

Environment

SAP cpMS cloud
SAP Cloud Connector
Client is native Android application
SAP Gateway with OData back service

Product

SAP BTP, Neo environment 1.0 ; SAP Mobile Platform 3.0

Keywords

OData cloud 400 error cpms , KBA , MOB-ONP-OOD , SAP Mobile On Premise Offline OData Server , Problem

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