iframe导致ClientAbortException:org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:369)中的java.io.IOException

Question

我正在使用iframe来显示pdf文件,用户可以保存它,打印它等等.但是当用户导航回来或其他地方时,总会抛出这个错误:

ClientAbortException:  java.io.IOException
    at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:369)
    at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:448)
    at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:363)
    at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:392)
    at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:381)
    at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89)
    at java.nio.channels.Channels$WritableByteChannelImpl.write(Channels.java:296)
    at com.sun.faces.application.resource.ResourceHandlerImpl.handleResourceRequest(ResourceHandlerImpl.java:277)
    at javax.faces.application.ResourceHandlerWrapper.handleResourceRequest(ResourceHandlerWrapper.java:119)
    at org.primefaces.application.PrimeResourceHandler.handleResourceRequest(PrimeResourceHandler.java:91)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:310)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
    at java.lang.Thread.run(Thread.java:662)

我能做什么？

Answer 1

ClientAbortException

通常,您可以忽略它.当客户端在页面仍在加载时突然中止HTTP请求时,将抛出此异常.当客户端按下Esc,或匆忙导航,关闭浏览器,或网络中断,甚至着火时,都会发生这种情况.所有这些完全是你无法控制的.

栈跟踪表明它是由处理的JSF资源请求<h:outputStylesheet>,<h:outputScript>以及<h:graphicImage>(以及PrimeFaces当量).因此,当浏览器尝试下载CSS,JS和/或图像资源时,就会发生这种情况.

好吧,你只是"和它一起生活".如果您对服务器日志中的"噪音"感到烦恼,可以考虑创建一个servlet过滤器来抑制这些异常.

try {
    chain.doFilter(request, response);
} catch (ClientAbortException e) {
    // Log a single line instead of whole stacktrace, or just ignore it.
}

请注意,这是一个特定于servlet容器的异常类(来自Catalina/Tomcat),因此这种过滤器与特定的servletcontainer make紧密耦合(即它不能移植到Glassfish或其他人).因为它是它的子类IOException,你可能想要捕获它并进行Class#getSimpleName()检查.