我想测试APIManager的API，我使用工具soapUI通过端点调用UserAdmin服务的接口listAllUsers
https://host:8243/services/UserAdmin.UserAdminHttpsSoap11Endpoint，并且我还在基本认证头中添加了admin用户/密码。但我无法得到结果。
APIManager 控制台输出的错误信息如下。
[2014-03-01 16:52:11,296] ERROR - AuthenticationHandler
java.lang.NullPointerException
at org.wso2.carbon.server.admin.module.handler.AuthenticationHandler.invalidateSession(AuthenticationHandler.java:215)
at org.wso2.carbon.server.admin.module.handler.AuthenticationHandler.isAuthenticated(AuthenticationHandler.java:175)
at org.wso2.carbon.server.admin.module.handler.AuthenticationHandler.authenticate(AuthenticationHandler.java:96)
at org.wso2.carbon.server.admin.module.handler.AuthenticationHandler.invoke(AuthenticationHandler.java:66)
at org.apache.axis2.engine.Phase.invokeHandler(Phase.java:340)
at org.apache.axis2.engine.Phase.invoke(Phase.java:313)
at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:261)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:167)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:403)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:183)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
[2014-03-01 16:52:11,300] ERROR - AxisEngine Authentication failure
org.apache.axis2.AxisFault: Authentication failure
at org.wso2.carbon.server.admin.module.handler.AuthenticationHandler.authenticate(AuthenticationHandler.java:123)
at org.wso2.carbon.server.admin.module.handler.AuthenticationHandler.invoke(AuthenticationHandler.java:66)
at org.apache.axis2.engine.Phase.invokeHandler(Phase.java:340)
at org.apache.axis2.engine.Phase.invoke(Phase.java:313)
at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:261)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:167)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:403)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:183)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
[2014-03-01 16:52:11,302] ERROR - ServerWorker Error processing …