是什么导致我的java.net.SocketException:连接重置?

问题

我们在日志中看到频繁的java.net.SocketException: Connection reset错误,该组件调用发送SMS消息的第三方Web服务。

我们的应用程序是用Java编写的,并且运行在Tomcat 5.5之上。它是由不再与我们在一起的承包商编写的。目前的团队没有真正的Java专业知识,我们不确定Connection reset错误实际来自哪里,以及如何进行调试。

该问题似乎完全断断续续,与我们尝试发送的消息无关。

有关此异常的典型原因可能是什么以及我们如何进行的任何建议都是受欢迎的。

整个调用堆栈包含在下面以保证完整性。

(com.companyname.mtix.sms是我们的组件)

java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(SocketInputStream.java:168)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:235)
        at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:77)
        at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:105)
        at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1115)
        at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1832)
        at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1590)
        at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:995)
        at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:397)
        at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:170)
        at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
        at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)
        at com.companyname.mtix.sms.services.impl.message.SendTextMessage.sendTextMessage(SendTextMessage.java:127)
        at com.companyname.mtix.sms.services.MessageServiceImpl.sendTextMessage(MessageServiceImpl.java:125)
        at com.companyname.mtix.sms.services.remote.MessageServiceRemoteImpl.sendTextMessage(MessageServiceRemoteImpl.java:43)
        at sun.reflect.GeneratedMethodAccessor203.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397)
        at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186)
        at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
        at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
        at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:453)
        at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)
        at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at com.companyname.mtix.sms.http.filters.NoCacheFilter.doFilter(NoCacheFilter.java:63)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at com.companyname.mtix.sms.http.filters.MessageFilter.doFilter(MessageFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:61)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.ajaxanywhere.AAFilter.doFilter(AAFilter.java:46)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)

##编辑

从中抛出异常的代码行是下面代码片段中的最后一行。

String aggregatorResponse = null;
HttpClient httpClient = prepareHttpClient( username, password );
PostMethod postMethod = preparePostMethod( textUrl );

try {
  SybaseTextMessageBuilder builder = new SybaseTextMessageBuilder();
  URL notifyUrl = buildNotificationUrl( textMessage, codeSetManager );
  String smsRequestDocument = builder.buildTextMessage( textMessage, notifyUrl );
  LOG.debug( "Sybase MT document created as: \n" + smsRequestDocument );

  postMethod.setRequestEntity( new StringRequestEntity( smsRequestDocument ) );
  LOG.debug( "commiting SMS to aggregator: " + textMessage.toString() );
  int httpStatus = httpClient.executeMethod( postMethod );

#1 热门回答(56 赞)

SocketException的javadoc声明它是

抛出以指示底层协议中存在错误,例如TCP错误

在你的情况下,似乎连接已被连接的服务器端关闭。这可能是你发送的请求或最终问题的问题。

为了帮助调试,你可以查看使用诸如Wireshark之类的工具来查看实际的网络数据包。此外,你是否有可用于测试Web服务的Java代码的替代客户端?如果成功,则可能表明Java代码中存在错误。

当你使用Commons HTTP Client时,请查看Common HTTP Client Logging Guide。这将告诉你如何在HTTP级别记录请求。


#2 热门回答(30 赞)

这个错误发生在你身边而不是另一边。如果对方重置连接,则异常消息应该说:

java.net.SocketException reset by peer

原因是内部连接HttpClient陈旧。检查SSL的陈旧连接不会修复此错误。解决方案:转储客户端并重新创建。


#3 热门回答(16 赞)

如果你尝试访问部署在Glassfish3服务器上的Web服务,则可能需要调整http-thread-pool设置。修复了许多并发线程调用Web服务时我们遇到的SocketExceptions。

  • 转到管理控制台
  • 导航到"配置" - >"服务器配置" - >"线程池" - >"http-thread-pool"。
  • 将"最大线程池大小"设置从5更改为32
  • 将"最小线程池大小"设置从2更改为16
  • 重启Glassfish。