The first message I send to my project occasionally errors with "MessagingException: failed to transform message headers", subsequent messages do not have this error. I am using JMeter to send in the messages to a SI deploy on Weblogic 10.3.6 with SI 2.2.1.

My configuration is as follows:
Code:
<int-http:inbound-gateway...

<!--Enrich with the transactionId to use for Audit logging -->
<int:header-enricher id="enrichWithTransactionId"
                         input-channel="ws-rawInboundChannel"
                         output-channel="ws-inboundChannel">
        <int:header name="transactionGuid" expression="headers.id"/>
    </int:header-enricher>

    <!--Add to the SI Message object a header field, payload is untouched-->
    <int:header-enricher id="enrichWithSoapHeader"
                         input-channel="ws-inboundChannel"
                         output-channel="enrichedWithSoapHeaderChannel">
        <int:header name="MySoapHeader" method="parse" ref="jaxb2012RequestParser"/>
    </int:header-enricher>

    public MySoapHeader parse(Message<SoapMessage> siMessage,
        @Header("transactionGuid") String transactionId) {...}

Since headers.id is a java.net.UUID, it has a toString() method to convert. However the first message after a deploy gets this message:

Code:
Caused by: org.springframework.integration.MessageHandlingException: org.springframework.expression.spel.SpelEvaluationException: EL1004E:(pos 8): Method call: Method parse(org.springframework.integration.message.GenericMessage,java.util.UUID) cannot be found on com....parser.JAXB2012RequestParser type
	at org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage(MethodInvokingMessageProcessor.java:76)
	at org.springframework.integration.transformer.HeaderEnricher$MessageProcessingHeaderValueMessageProcessor.processMessage(HeaderEnricher.java:270)
	at org.springframework.integration.transformer.HeaderEnricher.transform(HeaderEnricher.java:113)
If I clone the method into a second method with the second parameter using java.net.UUID, SI will (correctly) complain that both methods (UUID and String) are both candidates for SI to call and they need to be different.

The error "Method call: Method parse(org.springframework.integration.message.Gene ricMessage,java.util.UUID) cannot be found on com.....parser.JAXB2012RequestParser " is not correct, because it works after the first message.

After JMeter sends in the messages, and I rerun the same messages again, they all work.

Any ideas on how to get around this error?