如何只处理 ClientAbortException?

How to handle only ClientAbortException?

我正在编写一个下载文件控制器
有时用户会在文件完全写入之前关闭浏览器 window。 - 这很酷。

问题是我的日志中充满了这个错误:

org.apache.catalina.connector.ClientAbortException: java.io.IOException: An established connection was aborted by the software in your host machine at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:333) at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:758) at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:663) at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:368) at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:346) at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96) at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2147) at org.apache.commons.io.IOUtils.copy(IOUtils.java:2102) at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:2123) at org.apache.commons.io.IOUtils.copy(IOUtils.java:2078)

当我试图只捕捉这个特定的错误时,eclipse 说:

ClientAbortException cannot be resolved to a type

我有项目设置并且 运行 正确所以是否可以只捕获这个特定的异常:

   org.apache.catalina.connector.ClientAbortException

我想保留 IOException 以防再次发生灾难。

ClientAbortException 派生自IOException。您必须检查到底是什么异常导致 IOException e:

...
} catch (FileNotFoundException fnfe) {
    // ... handle FileNotFoundException
} catch (IOException e) {
    String exceptionSimpleName = e.getCause().getClass().getSimpleName();
    if ("ClientAbortException".equals(exceptionSimpleName)) {
        // ... handle ClientAbortException
    } else {
        // ... handle general IOException or another cause
    }
}
return null;

而不是寻找某个 class 名称(将您的应用程序绑定到特定的 servlet 容器)我通常处理 IOExceptions 写入时不同于读取时的 IOExceptions,就像这样(非常 pseudo-ish代码):

try {
  byte[] buffer = ...
  in.read(buffer);
  try {
    out.write(buffer);
  } catch (IOException writeException) {
    // client aborted request
  }
} catch (IOException readException) {
  // something went wrong -> signal 50x or something else
}

到目前为止还算不错。

(截至@Nikolas Charalambidis 的回答)

  • 忽略"org.apache.catalina.connector.ClientAbortException:java.io.IOException: Connection reset by peer"

    e.getCause().getClass().getSimpleName() == "IOException"

    e.getMessage() == "java.io.IOException: Connection reset by peer"

  • 并且不处理一般的 IOException 和其他原因

     ...    
     } catch (IOException e) {
         if (! e.getMessage().contains("Connection reset by peer")) {
             throw e;
         }
    
     } finally {
         close(output);
         close(input);
     }
     ...