SoapUI5.7 + Mule4.4: "java.lang.IllegalArgumentException: path parameter must start with /"

Question

I'm checking Mule with SoapUI and face an issue path parameter must start with /.

Error message on Mule

WARN  2022-01-23 00:01:02,491 [http.listener.03 SelectorRunner] org.glassfish.grizzly.filterchain.DefaultFilterChain: GRIZZLY0013: Exception during FilterChain execution
java.lang.IllegalArgumentException: path parameter must start with /
    at org.mule.runtime.api.util.Preconditions.checkArgument(Preconditions.java:25) ~[mule-api-1.4.0-20211227.jar:?]
    at org.mule.service.http.impl.service.util.DefaultRequestMatcherRegistry.lambda$new$1(DefaultRequestMatcherRegistry.java:69) ~[mule-service-http-1.6.3.jar:1.6.3]
    at com.github.benmanes.caffeine.cache.LocalLoadingCache.lambda$newMappingFunction$2(LocalLoadingCache.java:140) ~[caffeine-2.8.0.jar:?]
    at com.github.benmanes.caffeine.cache.BoundedLocalCache.lambda$doComputeIfAbsent$14(BoundedLocalCache.java:2379) ~[caffeine-2.8.0.jar:?]
    at java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1853) ~[?:1.8.0_282]
    at com.github.benmanes.caffeine.cache.BoundedLocalCache.doComputeIfAbsent(BoundedLocalCache.java:2377) ~[caffeine-2.8.0.jar:?]
    at com.github.benmanes.caffeine.cache.BoundedLocalCache.computeIfAbsent(BoundedLocalCache.java:2360) ~[caffeine-2.8.0.jar:?]
    at com.github.benmanes.caffeine.cache.LocalCache.computeIfAbsent(LocalCache.java:108) ~[caffeine-2.8.0.jar:?]
    at com.github.benmanes.caffeine.cache.LocalLoadingCache.get(LocalLoadingCache.java:54) ~[caffeine-2.8.0.jar:?]
    at org.mule.service.http.impl.service.util.DefaultRequestMatcherRegistry.find(DefaultRequestMatcherRegistry.java:260) ~[mule-service-http-1.6.3.jar:1.6.3]
    at org.mule.service.http.impl.service.server.HttpListenerRegistry.getRequestHandler(HttpListenerRegistry.java:109) ~[mule-service-http-1.6.3.jar:1.6.3]
    at org.mule.service.http.impl.service.server.grizzly.GrizzlyRequestDispatcherFilter.handleRead(GrizzlyRequestDispatcherFilter.java:123) ~[mule-service-http-1.6.3.jar:1.6.3]
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) ~[grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) ~[grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) ~[grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:540) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.mule.service.http.impl.service.server.grizzly.ExecutorPerServerAddressIOStrategy.run0(ExecutorPerServerAddressIOStrategy.java:99) [mule-service-http-1.6.3.jar:1.6.3]
    at org.mule.service.http.impl.service.server.grizzly.ExecutorPerServerAddressIOStrategy.executeIoEvent(ExecutorPerServerAddressIOStrategy.java:74) [mule-service-http-1.6.3.jar:1.6.3]
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.executeIoEvent(AbstractIOStrategy.java:89) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.nio.SelectorRunner.iterateKeyEvents(SelectorRunner.java:415) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.nio.SelectorRunner.iterateKeys(SelectorRunner.java:384) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.nio.SelectorRunner.doSelect(SelectorRunner.java:348) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at org.glassfish.grizzly.nio.SelectorRunner.run(SelectorRunner.java:279) [grizzly-framework-2.3.36-MULE-024.jar:2.3.36-MULE-024]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_282]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_282]
    at org.mule.service.scheduler.internal.AbstractRunnableFutureDecorator.doRun(AbstractRunnableFutureDecorator.java:113) [mule-service-scheduler-1.4.1/:?]
    at org.mule.service.scheduler.internal.RunnableFutureDecorator.run(RunnableFutureDecorator.java:54) [mule-service-scheduler-1.4.1/:?]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_282]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_282]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]

Steps

1. Find WSDL here (https://www.dataaccess.com/webservicesserver/numberconversion.wso?WSDL)

2. [Mule4.4] Create Listener and SOAP Router.
   HTTP Listener config: port = 1081
   SOAP configuration: Wsdl location = (URL in Step 1.)
   

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<mule xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:apikit-soap="http://www.mulesoft.org/schema/mule/apikit-soap" xmlns:ee="http://www.mulesoft.org/schema/mule/ee/core" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd http://www.mulesoft.org/schema/mule/apikit-soap http://www.mulesoft.org/schema/mule/apikit-soap/current/mule-apikit-soap.xsd http://www.mulesoft.org/schema/mule/ee/core http://www.mulesoft.org/schema/mule/ee/core/current/mule-ee.xsd">
    <http:listener-config name="api-httpListenerConfig">
        <http:listener-connection host="0.0.0.0" port="1081"/>
    </http:listener-config>
    <apikit-soap:config httpStatusVarName="httpStatus" name="soapkit-config" port="NumberConversionSoap" service="NumberConversion" wsdlLocation="https://www.dataaccess.com/webservicesserver/numberconversion.wso?WSDL"/>
    <flow name="api-main">
        <http:listener config-ref="api-httpListenerConfig" path="/NumberConversion/NumberConversionSoap">
            <http:response statusCode="#[attributes.additionalTransportData.statusCode default 200]">
                <http:body>#[payload]</http:body>
                <http:headers>#[attributes.protocolHeaders default {}]</http:headers>
            </http:response>
            <http:error-response statusCode="#[attributes.additionalTransportData.statusCode default 500]">
                <http:body>#[payload]</http:body>
                <http:headers>#[attributes.protocolHeaders default {}]</http:headers>
            </http:error-response>
        </http:listener>
        <apikit-soap:router config-ref="soapkit-config">
            <apikit-soap:attributes><![CDATA[#[%dw 2.0
              output application/java
              ---
              {
                  headers: attributes.headers,
                  method: attributes.method,
                  queryString: attributes.queryString
            }]]]></apikit-soap:attributes>
        </apikit-soap:router>
    </flow>
    <flow name="NumberToWords:\soapkit-config">
        <ee:transform>
            <ee:message>
                <ee:set-payload>
                    <![CDATA[%dw 2.0
output application/java
ns soap http://schemas.xmlsoap.org/soap/envelope
---
{
    body: {
        soap#Fault: {
            faultcode: "soap:Server",
            faultstring: "Operation [NumberToWords:\soapkit-config] not implemented"
        }
    } write "application/xml"
}]]>
                </ee:set-payload>
            </ee:message>
        </ee:transform>
    </flow>
    <flow name="NumberToDollars:\soapkit-config">
        <ee:transform>
            <ee:message>
                <ee:set-payload>
                    <![CDATA[%dw 2.0
output application/java
ns soap http://schemas.xmlsoap.org/soap/envelope
---
{
    body: {
        soap#Fault: {
            faultcode: "soap:Server",
            faultstring: "Operation [NumberToDollars:\soapkit-config] not implemented"
        }
    } write "application/xml"
}]]>
                </ee:set-payload>
            </ee:message>
        </ee:transform>
    </flow>
</mule>

3. [SoapUI5.7] Create a new SOAP API with the URL in Step 1. Then create a new request (https://0.0.0.0:1081/NumberConversion/NumberConversionSoap) and run it. The message at the bottom says "failed to respond"

4. [Mule4.4] See the message.

Notes

I confirm Listener's Path starts with "/".

Answer 1

It is a warning not an error. It is most likely harmless. Ensure you are using the last version of Studio and cumulative patches for Mule 4.4. There is something strange in the log though. It looks to be executing an HTTP service for Mule 4.3 (mule-service-http-1.6.3) which is not a right version for Mule 4. May be the project is being executed in Mule 4.3? Check the log when the application is starting and the run configuration to be sure.