2

通过 XSD 架构验证 XML 时出现 TimeoutException，并且与检查器关联的线程已挂起。

为什么会这样？如何避免这种情况？

堆栈跟踪：

TimeoutManage I   WTRN0124I: When the timeout occurred the thread with which the transaction is, or was most recently, associated was Thread[WebContainer : 3,5,main].  The stack trace of this thread when the timeout occurred was:
        java.net.SocketInputStream.socketRead0(Native Method)
        java.net.SocketInputStream.read(SocketInputStream.java:140)
        java.io.BufferedInputStream.fill(BufferedInputStream.java:229)
        java.io.BufferedInputStream.read1(BufferedInputStream.java:269)
        java.io.BufferedInputStream.read(BufferedInputStream.java:328)
        sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:700)
        sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:645)
        sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1205)
        org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
        org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
        org.apache.xerces.impl.xs.opti.SchemaParsingConfig.parse(Unknown Source)
        org.apache.xerces.impl.xs.opti.SchemaParsingConfig.parse(Unknown Source)
        org.apache.xerces.impl.xs.opti.SchemaDOMParser.parse(Unknown Source)
        org.apache.xerces.impl.xs.traversers.XSDHandler.getSchemaDocument(Unknown Source)
        org.apache.xerces.impl.xs.traversers.XSDHandler.resolveSchema(Unknown Source)
        org.apache.xerces.impl.xs.traversers.XSDHandler.constructTrees(Unknown Source)
        org.apache.xerces.impl.xs.traversers.XSDHandler.parseSchema(Unknown Source)
        org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
        org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
        org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
        org.apache.xerces.jaxp.validation.XMLSchemaFactory.newSchema(Unknown Source)
        javax.xml.validation.SchemaFactory.newSchema(Unknown Source)
        my.utils.XmlUtils.validate(XmlUtils.java:38)

用于验证的代码片段：

SchemaFactory schemaFactory = 
    SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
try {
    Schema schema = schemaFactory.newSchema(new StreamSource(new StringReader(xsd)));
    Validator validator = schema.newValidator();
...

异常发生在以下行：

Schema schema = schemaFactory.newSchema(new StreamSource(new StringReader(xsd)));
4

2 回答 2

4

如果没有看到实际的 XSD，很难确定，但很可能您的架构不是自包含的，而是包含一个或多个引用外部 URL的包含语句。schemaFactory 可能会尝试获取它们以构建完整的 XSD。

指出这一点的是getSchemaDocument()堆栈跟踪中的调用，它试图在parseSchema()您传入的 xsd 上执行过程中通过 HTTP 获取模式文档。

于 2012-09-16T13:23:12.893 回答
1

如果您的架构引用了 W3C 网站上的文档，例如 XML 命名空间的架构，则会出现一个特定的问题。W3C 故意延迟响应此类请求以阻止过度使用。这个想法是您应该重定向此类引用以使用文件的本地副本。

于 2012-09-16T21:56:21.310 回答