http - WSO2 序言中出现意外的 EOF

Question

我有一个代理调用 WSO2 ESB 4.6.0 中的另一个本地代理。基本上，定义是:

<proxy name="Proxy1" >
    <target>
        <inSequence>
            <xslt/>
            <header name="Action" value="issueActivity" />
            <send>
                <endpoint>
                    <address uri="http://localhost:8280/services/Proxy2" format="soap11"/>
                </endpoint>
            </send>
        </inSequence>
        <outSequence>
            <filter xpath="not(get-property('FAULT'))">
                <xslt/>
            </filter>
            <send />
        </outSequence>
    </target>
</proxy>

<proxy name="Proxy2">
    <target>
        <inSequence>
            <xslt />
            <property name="DISABLE_CHUNKING" value="true" scope="axis2"/>
            <send>
                <endpoint key="Inbound" />
            </send>
        </inSequence>
        <outSequence>
            <filter xpath="get-property('FAULT')">
                <then>
                    <sequence key="DefaultErrorSequence" />
                    <header name="To" action="remove" />
                </then>
                <else>
                    <property name="Content-Encoding" scope="transport" action="remove"/> 
                    <xslt/>
                </else>
            </filter>
            <send />
        </outSequence>
    </target>
</proxy>

在几乎所有调用中，流程都完美运行，但当 Proxy1 尝试调用 Proxy2 时，日志中会周期性地出现此错误:

TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:03:35,431]  WARN {org.apache.synapse.transport.passthru.TargetHandler} -  Receiving response while the handler is in an inconsistent state REQUEST_HEAD
TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:03:35,432] ERROR {org.apache.synapse.transport.passthru.util.RelayUtils} -  Error while building Passthrough stream
org.apache.axiom.om.OMException: com.ctc.wstx.exc.WstxEOFException: Unexpected EOF in prolog
 at [row,col {unknown-source}]: [1,0]
    at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296)
    at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.getSOAPEnvelope(StAXSOAPModelBuilder.java:204)
    at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.<init>(StAXSOAPModelBuilder.java:154)
    [...]

日志中错误的末尾:

TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:04:35,435]  WARN {org.apache.synapse.transport.passthru.TargetHandler} -  Connection time out while in state: REQUEST_DONE 
TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:04:35,436]  WARN {org.apache.synapse.FaultHandler} -  ERROR_CODE : 101507
TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:04:35,436]  WARN {org.apache.synapse.FaultHandler} -  ERROR_MESSAGE : Error in Sender
TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:04:35,437]  WARN {org.apache.synapse.FaultHandler} -  ERROR_DETAIL : Error in Sender 
TID: [0]  [ESB]  TID: [0] [ESB] [2014-05-08 12:04:35,437]  WARN {org.apache.synapse.FaultHandler} -  ERROR_EXCEPTION : null

根据 WSO2 文档，错误 101507 表示 Connection canceled。

问题是这个错误的原因是什么？是客户端问题还是服务端问题？

更新

显然，错误的原因与此问题中描述的相同:WSO2 ESB unknown error code 102511

Answer 1

您是否在编写查询时在操作部分启用了返回请求状态复选框？这可能会导致问题..尝试一下..