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Axis2 - No services found in this location

I am just trying to get a sample web service to work using Apache Tomcat 9, Axis2 and Ant. I am following https://axis.apache.org/axis2/java/core/docs/quickstartguide.html#introduction and I am getting this error

enter image description here

and on clicking the url

enter image description here

Below is how my environment look like and what I have done so far.

C:\Users\adars\Downloads\dev\git\webservices>echo %JAVA_HOME%
C:\Program Files\Java\jdk-18.0.1.1

C:\Users\adars\Downloads\dev\git\webservices>where java
C:\Program Files\Java\jre1.8.0_333\bin\java.exe
C:\Program Files\Java\jdk-18.0.1.1\bin\java.exe

C:\Users\adars\Downloads\dev\git\webservices>echo %AXIS2_HOME%
C:\javalibs\axis2-1.8.1

C:\Users\adars\Downloads\dev\git\webservices>echo %CATALINA_HOME%
C:\Program Files\Apache Software Foundation\Tomcat 9.0

C:\Users\adars\Downloads\dev\git\webservices>ant generate.wsdl Buildfile: C:\Users\adars\Downloads\dev\git\webservices\build.xml

compile.service: [mkdir] Created dir: C:\Users\adars\Downloads\dev\git\webservices\build\classes [javac] C:\Users\adars\Downloads\dev\git\webservices\build.xml:42: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds [javac] Compiling 1 source file to C:\Users\adars\Downloads\dev\git\webservices\build\classes

generate.wsdl:

BUILD SUCCESSFUL Total time: 4 seconds

C:\Users\adars\Downloads\dev\git\webservices>ant generate.service Buildfile: C:\Users\adars\Downloads\dev\git\webservices\build.xml

compile.service: [javac] C:\Users\adars\Downloads\dev\git\webservices\build.xml:42: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

generate.service: [copy] Copying 1 file to C:\Users\adars\Downloads\dev\git\webservices\build\classes [jar] Building jar: C:\Users\adars\Downloads\dev\git\webservices\build\Calculator.aar [copy] Copying 1 file to C:\Users\adars\Downloads\dev\repository\services

BUILD SUCCESSFUL Total time: 0 seconds

C:\Users\adars\Downloads\dev\git\webservices>tree /F
Folder PATH listing for volume Windows8_OS
Volume serial number is AEA2-7F54
C:.
│   build.xml
│
├───build
│   │   Calculator.aar
│   │   Calculator.wsdl
│   │
│   └───classes
│       ├───META-INF
│       │       services.xml
│       │
│       └───Start
│               Calculator.class
│
├───resources
│   └───META-INF
│           services.xml
│
└───src
    └───Start
            Calculator.java

C:\Users\adars\Downloads\dev\git\webservices>ls C:\Users\adars\Downloads\dev\repository\services Calculator.aar

C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\axis2\WEB-INF\services>jar -tvf Calculator.aar
     0 Sat Jun 18 18:50:46 AST 2022 META-INF/
   105 Sat Jun 18 18:50:44 AST 2022 META-INF/MANIFEST.MF
     0 Sat Jun 18 18:48:18 AST 2022 Start/
   525 Sat Jun 18 18:50:46 AST 2022 META-INF/services.xml
   462 Sat Jun 18 18:48:18 AST 2022 Start/Calculator.class 
<?xml version="1.0"?>

-<service scope="application" name="Calculator">

<description>A simple calulator to study web services</description>

<parameter name="ServiceClass" locked="false">Start.Calculator</parameter>


-<messageReceivers>

<messageReceiver class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver" mep="http://www.w3.org/ns/wsdl/in-only"/>

<messageReceiver class="org.apache.axis2.rpc.receivers.RPCMessageReceiver" mep="http://www.w3.org/ns/wsdl/in-out"/>

</messageReceivers>

<operation name="getSum"/>

</service>

I copy the Calculator.aar under C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\axis2\WEB-INF\services and restart Tomcat. But I get the error No services found in this location.

Solution

  • Finally I found the issue and resolved it, and I could get the service functional. enter image description here

    I increased the Tomcat debug level to ALL, and it showed error

    20-Jun-2022 20:13:11.479 FINE [main] org.apache.catalina.core.StandardContext.listenerStart Sending application start events
20-Jun-2022 20:13:11.839 FINE [main] org.apache.catalina.session.StandardSession.doReadObject readObject() loading session 0CC9F9423F1AB41ADEAE13CCCB7FCCB8
20-Jun-2022 20:13:11.839 FINE [main] org.apache.catalina.session.StandardSession.doReadObject   loading attribute 'errprservicemap' with value '{C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\axis2\WEB-INF\services\Calculator.aar=Error:
java.lang.UnsupportedClassVersionError: Start/Calculator has been **compiled by a more recent version of the Java Runtime (class file version 62.0), this version of the Java Runtime only recognizes class file versions up to 52.0**
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)

    I was compiling on a more recent version of java and Tomcat 9 could not recognize the error. I changed to Java 1.8 But I am surprised why this is not logged at an ERROR level and instead put at a fine level. Should this be logged as a bug ?