ClientAbortException: java.net.SocketException: 断开的管道

这次终于解决了 ClientAbortException ！

[ERROR] [- ::] net.jweb.actions.CommonDiskAction - 系统异常
ClientAbortException:  java.net.SocketException: 断开的管道
        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:)
        at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:)
        at org.apache.catalina.connector.Response.flushBuffer(Response.java:)
        at org.apache.catalina.connector.ResponseFacade.flushBuffer(ResponseFacade.java:)
        at net.jweb.actions.CommonDiskAction.download(CommonDiskAction.java:)
        at sun.reflect.GeneratedMethodAccessor420.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)
        at java.lang.reflect.Method.invoke(Method.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at net.jweb.security.Authorization.intercept(Authorization.java:)
        at net.jweb.mobile.security.Authorization.intercept(Authorization.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:)
        at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:)
        at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.TimerInterceptor.intercept(TimerInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.LoggingInterceptor.intercept(LoggingInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:)
        at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:)
        at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:)
        at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:)
        at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:)
        at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:)
        at java.lang.Thread.run(Thread.java:)
Caused by: java.net.SocketException: 断开的管道
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:)
        at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:)
        at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:)
        at org.apache.coyote.http11.InternalOutputBuffer.flush(InternalOutputBuffer.java:)
        at org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:)
        at org.apache.coyote.Response.action(Response.java:)
        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:)
        ...  more

产生原因就是 断点下载引起的： 客户端下载到了一半， 用户点了 暂停， 服务器发现连接已经断开（ 我认为是 httpResponse 已经断开引起的。）， 于是。

但是，我通过SocketException 是无法catch到 异常的， 因为异常是 ClientAbortException 类型，但是， 我却无法导入 ClientAbortException， 奇了怪了！

只能在 catch (Exception e) {   内部进行捕捉。 观察到e.getMessage() 竟然是null， 而异常的toString 是  ”  ClientAbortException:  java.net.SocketException: 断开的管道  ”， 于是采取了这种方法进行捕捉了：

} catch (SocketException e) {
            String message = e.getMessage();
            if (message.startsWith("ClientAbortException")) {
                return ;
            } else {
                e.printStackTrace();
            }
 } catch (Exception e) {
            httpget.abort();

            String message = e.toString();
            if (message.startsWith("ClientAbortException")) {
                return ;
            } else {
//                e.printStackTrace();
            }

//            logger.error("DDN 加载文件失败!DDN出现异常: " + e.toString()+",storePath="+storePath+",p"+p+",pend"+pend+",len="+len+",realLen="+realLen);
            return -;
 }

捕捉成功， 也正确返回了 1， 但是 后台的错误日志还是DuangDuang的 涌出来。。。

于是， 又只能做 重定向 错误流 的工作了。