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I'm new to web service and AXIS2.

I downloaded and installed axis2-1.6.2-bin.zip in C:\Apache\axis2-1.6.2-bin I followed the instruction at http://axis.apache.org/axis2/java/core/docs/quickstartguide.html to generate the WSDL file. i.e. in the C:\Apache\axis2-1.6.2-bin\axis2-1.6.2\samples\quickstart directory, I ran ant generate.wsdl

I got the error: "org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed."

I searched my system and found that the only jar that contains 'org.apache.commons.logging.Log' class is in C:\Apache\axis2-1.6.2-bin\axis2-1.6.2\lib\commons-logging-1.1.1.jar. Any idea what cause this error and how to fix this? Any work around for the problem?

Seem like this is a bug according to http://jira.codehaus.org/browse/MSITE-459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=237414#action_237414

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1 回答 1

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您引用的 Jira 链接与 Maven 相关，因此没有相关性。我怀疑您的问题与您的 ANT 环境有关。

您是否将罐子放在以下位置之一？

  • $ANT_HOME/lib
  • $HOME/.ant/lb

这些将自动添加到您的类路径中，并可能导致此报告的类冲突。调查类路径问题的一个好方法是在调试和/或诊断模式下运行 ANT。

ant generate.wsdl -diagnostics

将包括一份关于 ANT 加载了哪些 jar 以及在何处加载的报告。

工作示例

使用 ANT 1.9.0

$ ant -version
Apache Ant(TM) version 1.9.0 compiled on March 5 2013

我从下载的axis2发行版中提取了快速入门项目

$ cp -r $AXIS2_HOME/samples/quickstart .
$ tree
.
└── quickstart
    ├── build.xml
    ├── README.txt
    ├── resources
    │   └── META-INF
    │       └── services.xml
    └── src
        └── samples
            └── quickstart
                └── service
                    └── pojo
                        └── StockQuoteService.java

运行

$ ant -f quickstart/build.xml generate.wsdl -DAXIS2_HOME=$AXIS2_HOME
Buildfile: /home/mark/tmp/quickstart/build.xml

compile.service:
    [mkdir] Created dir: /home/mark/tmp/quickstart/build
    [mkdir] Created dir: /home/mark/tmp/quickstart/build/classes
    [javac] /home/mark/tmp/quickstart/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 /home/mark/tmp/quickstart/build/classes
    [javac] Note: /home/mark/tmp/quickstart/src/samples/quickstart/service/pojo/StockQuoteService.java uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.

generate.wsdl:
[java2wsdl] log4j:WARN No appenders could be found for logger (org.apache.axis2.util.Loader).
[java2wsdl] log4j:WARN Please initialize the log4j system properly.

BUILD SUCCESSFUL
Total time: 2 seconds

生成预期的文件

$ tree
.
├── build
│   └── StockQuoteService.wsdl
└── quickstart
    ├── build
    │   └── classes
    │       └── samples
    │           └── quickstart
    │               └── service
    │                   └── pojo
    │                       └── StockQuoteService.class
    ├── build.xml
    ├── README.txt
    ├── resources
    │   └── META-INF
    │       └── services.xml
    └── src
        └── samples
            └── quickstart
                └── service
                    └── pojo
                        └── StockQuoteService.java

ANT 调试输出显示正在使用的 AXIS2 commons-logging jar：

$ ant -f quickstart/build.xml generate.wsdl -DAXIS2_HOME=$AXIS2_HOME -debug | grep "org/apache/commons/logging"
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogFactory.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogConfigurationException.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogFactory$6.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/WeakHashtable.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogFactory$1.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/WeakHashtable$Referenced.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/WeakHashtable$WeakKey.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogFactory$4.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogFactory$3.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/LogFactory$2.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/LogFactoryImpl.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/LogFactoryImpl$2.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/LogFactoryImpl$1.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/impl/Log4JLogger.class
Loaded from /opt/axis2-1.6.2/lib/commons-logging-1.1.1.jar org/apache/commons/logging/Log.class
于 2013-10-05T09:44:38.680 回答