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我在使用 WSO2 ESB 4.8.1 处理 IDoc 时遇到问题。每次传入带有空段的 IDoc（这似乎是一个有效的 IDoc）时，Xerces 都会抛出一个错误：

ERROR - Axis2IDocHandler Error while processing the IDoc through the Axis engine
java.lang.NullPointerException
    at com.sun.org.apache.xerces.internal.impl.XML11NSDocumentScannerImpl.scanStartElement(XML11NSDocumentScannerImpl.java:351)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2756)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:647)
    at com.sun.org.apache.xerces.internal.impl.XML11NSDocumentScannerImpl.next(XML11NSDocumentScannerImpl.java:852)
    at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:554)
    at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225)
    at org.apache.axiom.util.stax.dialect.DisallowDoctypeDeclStreamReaderWrapper.next(DisallowDoctypeDeclStreamReaderWrapper.java:34)
    at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225)
    at org.apache.axiom.util.stax.dialect.SJSXPStreamReaderWrapper.next(SJSXPStreamReaderWrapper.java:138)
    at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:681)
    at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:214)
    at org.apache.axiom.om.impl.llom.OMElementImpl.getNextOMSibling(OMElementImpl.java:336)
    at org.apache.axiom.om.impl.traverse.OMChildrenIterator.getNextNode(OMChildrenIterator.java:36)
    at org.apache.axiom.om.impl.traverse.OMAbstractIterator.hasNext(OMAbstractIterator.java:58)
    at org.apache.axiom.om.impl.traverse.OMFilterIterator.hasNext(OMFilterIterator.java:54)
    at org.wso2.carbon.transports.sap.idoc.util.IDoCAdapterUtils.stampArcKey(IDoCAdapterUtils.java:62)
    at org.wso2.carbon.transports.sap.idoc.Axis2IDocHandler$IDocWorker.run(Axis2IDocHandler.java:132)
    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)

这很可能是此处所述的 JDK Xerces 实现中的一个问题。

有什么方法可以设置 Axis2 以使用另一个流阅读器，或者是否有任何其他解决方案来解决这个问题？

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1 回答 1

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您可以尝试通过将最新版本的 jar 文件放在 ESB_HOME/repository/components/lib 目录下来升级 Xerces jar 文件。

于 2015-07-24T01:29:24.873 回答