Mule Custom Exception Class not catching some exceptions - exception

Question

I have a Mule flow which obtains an oauth token from a service which may throw a fault. However the exception is not caught in the flow even though there is a catch exception strategy at the end. Can someone explain why the exception is not caught? When I post XML via SOAP UI using an invalid token to trigger an exception, the request gets to the flow, but the exception is not caught. Instead I get a stack trace indicating an invalid token. Here is the flow:
<flow name="order-query">
<http:listener config-ref="HTTP_config"
path="order/request" doc:name="HTTP" />
<flow-ref name="oauth-token-service">
<cxf:jaxws-service doc:name="SPOP SOAP"
serviceClass="o.x.p.SpopWS">
<cxf:inInterceptors>
<spring:ref bean="HeaderInInterceptor" />
</cxf:inInterceptors>
<cxf:outInterceptors>
<spring:ref bean="faultOutInterceptor" />
<spring:ref bean="headerOutInterceptor" />
</cxf:outInterceptors>
<cxf:outFaultInterceptors>
<spring:ref bean="OutSoapFaultInterceptor" />
</cxf:outFaultInterceptors>
</cxf:jaxws-service>
<scripting:transformer>
<scripting:script engine="python">
...
</scripting:script>
<scripting:transformer>
<catch-exception-strategy>
<logger level="INFO" message=" Should be handled here #[payload]"/>
</catch-exception-strategy>
</flow>

Answer 1

are you sure the exception is not catched? the default behavior of catch-exception-strategy is to log the catched exception. This is the reason why you see the stack trace in logs.
for mule 3.8 and above: you can disable/enable this behavior either with a checkbox (Log Exceptions):
or in XML (logException=false):
<catch-exception-strategy logException="false" doc:name="Catch Exception Strategy">
<logger level="INFO" doc:name="Logger"/>
</catch-exception-strategy>
for mule 3.7: take a look here: https://stackoverflow.com/a/42181054/804521