OnException does not work for Camel CXF used as Producer - apache-camel

Question

Camel / CXF versions used:
<camel-version>2.18.1</camel-version>
<cxf-version>3.1.7</cxf-version>
Using Spring DSL to define routes. Sample code:
<cxf:cxfEndpoint address="{{ws.url}}" id="wsCallCxfBean"
serviceClass="com.some.package.GeneratedClassEndpoint">
<cxf:properties>
<entry key="username" value="${ws.username}" />
<entry key="password" value="${ws.password}" />
</cxf:properties>
<cxf:outInterceptors>
<ref bean="logOutbound" />
</cxf:outInterceptors>
</cxf:cxfEndpoint>
Camel Context:
<camel:errorHandler id="deadLetterErrorHandler" type="DeadLetterChannel" deadLetterUri="log:dead" />
<camelContext id="camelCxtId" trace="{{trace}}" handleFault="true" errorHandlerRef="deadLetterErrorHandler"
xmlns="http://camel.apache.org/schema/spring">
<onException id="onCContextException_Common">
<exception>java.lang.Exception</exception>
<redeliveryPolicy maximumRedeliveries="2" />
<!-- mark this as handled -->
<handled>
<constant>true</constant>
</handled>
<to id="onCContextExceptionHandling_Common" pattern="OutOnly" uri="vm:onRouteErrorOutMsgCaught" />
</onException>
.....
Route:
<route id="wsCall_RouteID" handleFault="true">
<description>Call the web service</description>
<from id="vmFrom_id" uri="vm:fromPOJOVM" />
<to id="wsCall_id" uri="cxf:bean:wsCallCxfBean" />
<onException id="onRouteException_WS">
<exception>java.lang.Exception</exception>
<redeliveryPolicy maximumRedeliveries="2" />
<handled>
<constant>true</constant>
</handled>
<to id="onRouteExceptionHandling_WS" pattern="OutOnly"
uri="vm:onRouteErrorOutMsgCaught" />
</onException>
</route>
Issue that I am facing:
Whenever exception is thrown in CXF, it is not handled by the Camel onException.
I can see the exception in the log. Sample exception from log (truncated):
WARN PhaseInterceptorChain:449 - Interceptor for {http://someaddress}WSEndpointService#
{http://someaddress}WSOperation has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: Marshalling Error: Connection timed out: connect
at org.apache.cxf.jaxb.JAXBEncoderDecoder.marshall(JAXBEncoderDecoder.java:266)
...
Caused by: javax.xml.bind.MarshalException
- with linked exception:
[java.net.ConnectException: Connection timed out: connect]
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:328)
... 20 more
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
...
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:323)
I have tried adding handleFault="true" in my camel context and Route - but that did not help.
How can I catch the exception thrown in CXF (for eg: the timeout, unknown host etc) in my camel route?
Thanks