使用spring-ws客户端的骆驼路由偶尔会抛出javax.xml.transform.stax.StAXSource异常 [英] Camel route using spring-ws client occasionally throws javax.xml.transform.stax.StAXSource exception

问题描述

我有一个骆驼'seda'路线，大致包含代码:

I have a camel 'seda' route that contains code roughly:

JaxbDataFormat jaxb = new JaxbDataFormat(false);
jaxb.setContextPath("com.example.data.api");

from("seda:validate")
   .marshal(jaxb)
   .to("spring-ws:" + getDataServiceURL())
   .unmarshal(jaxb)

我从 com.example.data.api 发送一个对象，JaxbDataFormat 格式化程序将它设置为一个 SOAP 请求，并将它传递给 spring-ws 以实际发送到我的服务.这在大多数情况下都很有效.

I send an object from com.example.data.api, the JaxbDataFormat formatter sets it up as a SOAP request and passes it along wo spring-ws to actually send to my service. This works like a charm most of the time.

我说大多数"是因为 spring-ws 时不时地抛出一个异常，如下所示:

I say "most" because every now and then, spring-ws throws an exception like so:

org.springframework.ws.client.WebServiceTransformerException: Transformation error: Can't transform a Source of type javax.xml.transform.stax.StAXSource; nested exception is javax.xml.transform.TransformerException: Can't transform a Source of type javax.xml.transform.stax.StAXSource
    at org.springframework.ws.client.core.WebServiceTemplate.doSendAndReceive(WebServiceTemplate.java:608)
    at org.springframework.ws.client.core.WebServiceTemplate.sendAndReceive(WebServiceTemplate.java:537)
    at org.springframework.ws.client.core.WebServiceTemplate.doSendAndReceive(WebServiceTemplate.java:492)
    at org.springframework.ws.client.core.WebServiceTemplate.sendSourceAndReceive(WebServiceTemplate.java:479)
    at org.springframework.ws.client.core.WebServiceTemplate.sendSourceAndReceive(WebServiceTemplate.java:470)
    at org.apache.camel.component.spring.ws.SpringWebserviceProducer.process(SpringWebserviceProducer.java:81)
    at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
    at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)

其中的核心是这条错误消息:无法转换 javax.xml.transform.stax.StAXSource 类型的源".

The core of that is this error message: "Can't transform a Source of type javax.xml.transform.stax.StAXSource".

这些都没有意义.Jaxb 编组已经确保所讨论的对象是一个 XML 字符串(根据我所做的任何调试日志记录).此外，这个确切的代码大部分时间都可以工作，只是偶尔会失败.它看起来是随机的.

None of that makes sense. The Jaxb marshalling will have already made sure that the object in question is an XML string (according to any debug logging I do). Furthermore, this exact code works most of the time and only occasionally will fail. It appears random.

例如，我在几分钟前运行了一个测试，我在我的路由中发送了一条消息并收到了这个错误.然后我重新启动了我的服务并重新发送了 exact 相同的消息......它就像一个魅力.相同的代码；相同的环境；相同的测试——两​​个不同的结果.

For instance, I ran a test just a few minutes ago where I sent a message into my route and got this error. I then restarted my service and resend the exact same message... and it worked like a charm. Same code; same environment; same test -- two different results.

正是这种随机性让这一切变得如此令人抓狂.我应该寻找什么来确保这种情况永远不会发生?

It's this randomness that makes this so maddening. Any ideas what I should be looking for to making sure this never happens?

推荐答案

问题不在于 Camel，而在于 Spring-WS.在 WS 模板配置中修改 transformerFactoryClass 会起作用

The issue is not with Camel but Spring-WS. Modifying the transformerFactoryClass in WS template config would work

<bean id="baseCamelMarshallerWSTemplate" class="org.springframework.ws.client.core.WebServiceTemplate" scope="prototype">
        <constructor-arg ref="messageFactory" />
        <property name="messageSender">
            <ref bean="httpSender"/>
        </property>
        <property name="checkConnectionForError" value="true"/>
        **<property name="transformerFactoryClass" value="com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl"/>**
    </bean>

如果你仍然遇到问题，请分享 spring WS 配置和测试用例

If you still face the issue, please share spring WS config and a test case

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