java – NetConnection.Call.Failed偶尔在Flex3 / Tomcat / BlazeDS / Spring中发生

我有一个非常大的问题.我使用Flex3 / Tomcat / BlazeDS / Spring编写了一个大型应用程序,在本地开发时运行良好,当我部署到公共开发环境时很好,但是当部署到我们的测试环境时经常失败.

当远程处理请求花费大量时间(超过20秒)时,故障似乎最常发生.在我的开发服务器上,错误发生,但仅在请求需要很长时间(超过45秒)时才会发生.但是,错误也会偶尔发生(发送请求并立即失败).大多数错误也有HTTP状态：502(坏网关),但有些只是说HTTP失败.

除了将war文件放在webapps目录中之外,我没有对BlazeDS做过任何特别的事情.通过https访问该应用程序.远程呼叫仅通过“目的地”引用服务器.我们的DEV和TEST实例上的tomcat服务器具有相同的java参数(相同的Xms和Xmx等).以下是我的相关文件：

services-config.xml中

<?xml version="1.0" encoding="UTF-8"?>
<services-config>
    <services>
        <default-channels>
           <channel ref="my-secure-amf"/>
        </default-channels>
    </services>
    <channels>
        <channel-definition id="my-secure-amf" class="mx.messaging.channels.SecureAMFChannel">
            <endpoint url="https://{server.name}:{server.port}/{context.root}/messagebroker/amfsecure" class="flex.messaging.endpoints.SecureAMFEndpoint"/>
            <properties>
                <add-no-cache-headers>false</add-no-cache-headers>
            </properties>
        </channel-definition>
    </channels>
<services-config>

web.xml中

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    ...

    <servlet>
        <servlet-name>spring-flex</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/flexContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring-flex</servlet-name>
        <url-pattern>/messagebroker/*</url-pattern>
    </servlet-mapping>
</web-app>

flexContext.xml

<!--
    I have component-scan tags here to scan my class files. The Controller I'm using for flex has an annotation on it to define it as a remote destination. Here it is:
    @Controller
    @RemotingDestination(value = "dest", channels="my-secure-amf")
    public class FlexController {
-->

<bean id="flexExceptionTranslator" class="edu.liberty.zconduct.web.FlexExceptionTranslator" />

<flex:message-broker>
    <flex:exception-translator ref="flexExceptionTranslator"/>
    <!-- <flex:secured /> Had this previously, but it wasn't working then, either -->
</flex:message-broker>

我快要接近绳子了.错误是app-breaker.如果可以,请帮助我.

编辑
我切换到http仍然得到错误. Tomcat现在说：

WARNING: Error sending end packet

java.net.SocketException: Broken pipe

我在我的apache日志中查找jk_mod并查看一些看起来像我发送的请求的调试信息,然后是以下内容：

[debug]
ajp_send_request::jk_ajp_common.c
(1592): Resent the request body (432)

[debug]
jk_shutdown_socket::jk_connect.c
(681): About to shutdown socket 68

[debug]
jk_shutdown_socket::jk_connect.c
(732): Shutdown socket 68 and read 0
lingering bytes

[info]
ajp_connection_tcp_get_message::jk_ajp_common.c
(1150): (myTestServer) can’t receive
the response header message from
tomcat, network problems or tomcat
(xx.xx.xx.xx:xxxx) is down (errno=11)

[error] ajp_get_reply::jk_ajp_common.c
(1962): (myTestServer) Tomcat is down
or refused connection. No response has
been sent to the client (yet)

[info] ajp_service::jk_ajp_common.c
(2447): (myTestServer) sending request
to tomcat failed (recoverable),
(attempt=2)

[error] ajp_service::jk_ajp_common.c
(2466): (myTestServer) connecting to
tomcat failed.

[debug]
ajp_reset_endpoint::jk_ajp_common.c
(743): (myTestServer) resetting
endpoint with sd = 4294967295 (socket
shutdown)

[debug] ajp_done::jk_ajp_common.c
(2905): recycling connection pool
slot=0 for worker myTestServer

[info] jk_handler::mod_jk.c (2615):
Service error=0 for
worker=myTestServer

解决方法:

Cornel Creanga帮我解决了这个问题.我将我的应用程序切换为http并开始在catalina.out文件中接收消息.我不知道为什么会影响它,但确实如此.消息都说套接字中有一根管子坏了.进一步调查显示jk_mod参与其中.

通过大量搜索,我发现我们的SysAdmins已经在我们的TEST服务器上将服务器上的套接字超时设置为10秒,但在我们的DEV服务器上设置为5分钟,因此进行的大量搜索导致它在达到TEST后超时.

SysAdmins在TEST上调整了配置,以便另一个工作程序(超时5分钟)处理此上下文路径的调用.

原文地址：https://codeday.me/bug/20190705/1384228.html

java – NetConnection.Call.Failed偶尔在Flex3 / Tomcat / BlazeDS / Spring中发生

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