Runtime error on WSO2 ESB 5.0 - wso2

Question

I'm trying to use WS02 ESB 5.0 to call a web service every 15 seconds, so I have this task:
<?xml version="1.0" encoding="UTF-8"?>
<task class="org.apache.synapse.startup.tasks.MessageInjector"
group="synapse.simple.quartz" name="UpdateName" xmlns="http://ws.apache.org/ns/synapse">
<trigger cron="0/15 * * * * ?" />
<property name="message"
xmlns:task="http://www.wso2.org/products/wso2commons/tasks">
<def:login soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:def="http://DefaultNamespace" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<id xsi:type="xsd:string">usr</id>
<pw xsi:type="xsd:string">pwd</pw>
</def:login>
</property>
<property name="sequenceName" value="main"
xmlns:task="http://www.wso2.org/products/wso2commons/tasks" />
<property name="injectTo" value="sequence"
xmlns:task="http://www.wso2.org/products/wso2commons/tasks" />
</task>
And this sequence:
<?xml version="1.0" encoding="UTF-8"?>
<sequence name="main" xmlns="http://ws.apache.org/ns/synapse">
<in>
<send>
<endpoint>
<wsdl port="SakaiLogin" service="SakaiLoginService" trace="disable"
uri="http://myserver/sakai-axis/SakaiLogin.jws?wsdl" />
</endpoint>
</send>
</in>
<out>
<send />
</out>
<log level="full" />
</sequence>
Both from the examples shown in the documentation:
https://docs.wso2.com/display/ESB500/Adding+and+Scheduling+Tasks (See "Injecting the message to a named sequence or proxy service").
https://docs.wso2.com/display/ESB500/Sample+56:+Using+a+WSDL+Endpoint+as+the+Target+Endpoint (See "Building the sample").
However, I'm getting this error once I start the Carbon WSO2 ESB server:
[2017-01-27 17:03:45,005] ERROR - InMediator Runtime error occurred while mediating the message
java.lang.NullPointerException
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.isTransportSwitching(Axis2SynapseEnvironment.java:783)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:545)
at org.apache.synapse.endpoints.AbstractEndpoint.send(AbstractEndpoint.java:382)
at org.apache.synapse.endpoints.WSDLEndpoint.send(WSDLEndpoint.java:75)
at org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:121)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:97)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:59)
at org.apache.synapse.mediators.filters.InMediator.mediate(InMediator.java:74)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:97)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:59)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:158)
at org.apache.synapse.mediators.MediatorWorker.run(MediatorWorker.java:80)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
[2017-01-27 17:03:45,023] INFO - LogMediator To: ,
MessageID: urn:uuid:097fb69e-6461-428e-ac85-93cfde65d02e,
Direction: request,
MESSAGE = Executing default 'fault' sequence,
ERROR_CODE = 0,
ERROR_MESSAGE = Runtime error occurred while mediating the message, Envelope:
<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
<soapenv:Body>
<def:login xmlns:def="http://DefaultNamespace" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<id xmlns="http://ws.apache.org/ns/synapse" xsi:type="xsd:string">usr</id>
<pw xmlns="http://ws.apache.org/ns/synapse" xsi:type="xsd:string">pwd</pw>
</def:login></soapenv:Body></soapenv:Envelope>
Can anybody give me a clue of what is going on?
Much appreciated!

Answer 1

In the wsdl endpoint the uri value must be the WSDL address, not the service endpoint:
WSDL URI The URI of the WSDL. Click Test to test the URI.
So, the WSDL endpoint inside the send mediator extracts the service endpoint from the WSDL document using the service and port name to find it inside the wsdl document.
UPDATE 1:
My task config xml:
<?xml version="1.0" encoding="UTF-8"?>
<task xmlns="http://ws.apache.org/ns/synapse"
name="UpdateName"
class="org.apache.synapse.startup.tasks.MessageInjector"
group="synapse.simple.quartz">
<trigger cron="0/15 * * * * ?"/>
<property name="proxyName" value="testTask"/>
<property name="message">
<moc:QRY_SELECT_SRH_EMPLEADO xmlns:moc="http://www.example.org/mockWS/">
<INT_ID>gero et</INT_ID>
</moc:QRY_SELECT_SRH_EMPLEADO>
</property>
<property name="soapAction"
value="http://www.example.org/mockWS/QRY_SELECT_SRH_EMPLEADO"/>
<property name="injectTo" value="proxy"/>
</task>
My sequence named main1:
<?xml version="1.0" encoding="UTF-8"?>
<sequence xmlns="http://ws.apache.org/ns/synapse" name="main1">
<in>
<header name="Action" scope="default" value="http://www.example.org/mockWS/QRY_SELECT_SRH_EMPLEADO"/>
<send>
<endpoint>
<wsdl service="mockWS"
port="mockWSSOAP"
uri="http://localhost:8088/mockmockWSSOAP?wsdl"/>
</endpoint>
</send>
</in>
<out>
<log level="full"/>
<drop/>
</out>
</sequence>
And finally I created a proxy with the same logic because a issue with the drop mediator inside a sequence:
<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
name="testTask"
transports="https http"
startOnLoad="true">
<target>
<inSequence>
<header name="Action" scope="default" value="http://www.example.org/mockWS/QRY_SELECT_SRH_EMPLEADO"/>
<send>
<endpoint>
<wsdl service="mockWS"
port="mockWSSOAP"
uri="http://localhost:8088/mockmockWSSOAP?wsdl"/>
</endpoint>
</send>
</inSequence>
<outSequence>
<log level="full"/>
<drop/>
</outSequence>
<faultSequence/>
</target>
</proxy>