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我有一個Oracle SOA組合在Weblogic 11g中生成BPEL故障。在EnterpriseManager我看到故障和消息：Oracle BPEL故障選擇失敗
<bpelFault>
<faultType>0</faultType>
<selectionFailure xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"></selectionFailure>
</bpelFault>
當我鑽入我看到上assignement列出的以下消息實例： 錯誤評估在線「493」的表達。結果XPath表達式爲空：
"/ns27:UsersCollection/ns27:Users/ns27:id"
我看到WLS-SOA1-diagnostic.log以下錯誤：
com.oracle.bpel.client.BPELFault: faultName: {{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure}
messageType: {{http://schemas.oracle.com/bpel/extension}RuntimeFaultMessage}
at com.collaxa.cube.engine.ext.bpel.common.BPELWMPHelper.evalFromValue(BPELWMPHelper.java:344)
at com.collaxa.cube.engine.ext.bpel.v1.wmp.BPEL1AssignWMP.__executeStatements(BPEL1AssignWMP.java:138)
at com.collaxa.cube.engine.ext.bpel.common.wmp.BaseBPELActivityWMP.perform(BaseBPELActivityWMP.java:166)
at com.collaxa.cube.engine.CubeEngine.performActivity(CubeEngine.java:2687)
at com.collaxa.cube.engine.CubeEngine._handleWorkItem(CubeEngine.java:1190)
at com.collaxa.cube.engine.CubeEngine.handleWorkItem(CubeEngine.java:1093)
at com.collaxa.cube.engine.dispatch.message.instance.PerformMessageHandler.handleLocal(PerformMessageHandler.java:78)
at com.collaxa.cube.engine.dispatch.DispatchHelper.handleLocalMessage(DispatchHelper.java:218)
at com.collaxa.cube.engine.dispatch.DispatchHelper.sendMemory(DispatchHelper.java:297)
at com.collaxa.cube.engine.CubeEngine.endRequest(CubeEngine.java:4609)
at com.collaxa.cube.engine.CubeEngine.endRequest(CubeEngine.java:4541)
at com.collaxa.cube.engine.CubeEngine._createAndInvoke(CubeEngine.java:713)
at com.collaxa.cube.engine.CubeEngine.createAndInvoke(CubeEngine.java:560)
at com.collaxa.cube.engine.ejb.impl.CubeEngineBean.createAndInvoke(CubeEngineBean.java:103)
at com.collaxa.cube.engine.ejb.impl.CubeEngineBean.syncCreateAndInvoke(CubeEngineBean.java:145)
at com.collaxa.cube.engine.ejb.impl.bpel.BPELEngineBean.syncCreateAndInvoke(BPELEngineBean.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
有沒有人遇到這個問題？這似乎很奇怪，因爲我們偶爾會看到這個故障和錯誤。