https://userapps.support.sap.com/sap/support/knowledge/en/2766799
2766799 - jco.client.ashost property missing in UMEBackendConnection property sheet | SAP Knowledge...
The SAP NetWeaver Application Server for Java, Config Tool UMEBackendConnection property sheet does not contain the jco.client.ashost property. std_server file...
jcoclientproperty
https://userapps.support.sap.com/sap/support/knowledge/en/2202217
2202217 - How to edit UMEBackendConnection when AS Java is down | SAP Knowledge Base Article
For various reasons that you would like to edit UMEBackendConnection configuration, but it is not possible through NWA because AS Java stack is down.
https://userapps.support.sap.com/sap/support/knowledge/en/2009529
2009529 - JCO_ERROR_RESOURCE: Connection pool UMEBackendConnection - UME connection to ABAP...
UME connection issues occur to ABAP datasource due to the pool size of RFC destination "UMEBackendConnection" exhausted. The error message below have been...
resource connectionjcoerrorpoolume