使用SOAP UI调用接口时遇XIAdapter错误，请求排查问题根源

Let's break down what's happening here and narrow down the root cause step by step:

First, Decode the Error #

The SOAP:Server fault paired with ADAPTER.JAVA_EXCEPTION in the detail section tells us this is a server-side issue originating from the SAP XI Adapter layer — it’s almost certainly not a problem with SOAP UI itself. The adapter threw a Java exception, but the error message doesn’t include full context (hence the "See log trace with id: n/a").

Spot the Obvious Red Flag in Your Request #

Looking at your payload, one immediate issue jumps out:

<Item>
  <SegmentIdentifier>?</SegmentIdentifier>
</Item>

The ? here looks like an un-replaced placeholder. Most SOAP services won’t accept a literal ? as a valid identifier value. This could easily trigger a parsing or validation error on the server that bubbles up as that Java exception.

Other Possible Causes to Rule Out #

• Hidden Required Parameters: Even though fields are marked <!--Optional:-->, some services have unstated rules. For example, if you include the <List> node, the nested <SegmentIdentifier> might actually be required — leaving it as ? or blank could break processing.
• Incorrect SOAP UI Configuration: Double-check your setup:
  • Confirm the endpoint URL points to the correct environment (test/production).
  • Ensure the HTTP method is set to POST (standard for SOAP requests).
  • Verify the Content-Type header is set to either text/xml or application/soap+xml (match the service’s requirements).
  • If the service expects a SOAPAction header, make sure it’s populated with the correct value (usually found in the WSDL).
• Server-Side Internal Failures: The Java exception could stem from backend issues — like a downed database, deployment glitch, or resource shortage — but we should rule out client-side issues first.

Recommended Next Steps #

1. Fix the Placeholder: Replace the ? in <SegmentIdentifier> with a valid, existing segment ID from your test environment. If you don’t have one, try removing the entire <List> node (since it’s marked optional) and resend the request.
2. Validate Payload Against WSDL: Cross-check your request structure against the service’s WSDL to ensure all fields use correct data types (dates, strings, etc.) — some services require empty optional fields to be omitted instead of left blank.
3. Pull Server Logs: If the error persists, reach out to the team managing the SAP XI service. They can access detailed adapter logs to see the exact Java exception (e.g., NullPointerException, validation failure) causing the problem.

内容的提问来源于stack exchange，提问作者Shiva Kumar