未捕获javasocket读取IOException？

Question

在grails中，socket读取失败还是ioexception被捕获？即使我已将错误部分包装在try-catch块中，也会触发以下错误

ERROR 2021-03-28 08:34:10,170 [ajp-bio-8109-exec-39783] errors.GrailsExceptionResolver: IOException occurred when processing request: [POST] /race/results/
Socket read failed. Stacktrace follows:
java.io.IOException: Socket read failed
    at java.io.FilterInputStream.read(FilterInputStream.java:133)
    at java.io.PushbackInputStream.read(PushbackInputStream.java:186)
    at java.io.InputStreamReader.read(InputStreamReader.java:184)
    at java.io.Reader.read(Reader.java:140)
    at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1485)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1461)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1436)
    at org.apache.commons.io.IOUtils.toString(IOUtils.java:585)
    at grails.converters.JSON.parse(JSON.java:312)
    at grails.converters.JSON.parse(JSON.java:347)

在抛出错误时，我将其包装在try-catch块中，如下所示

 def results(){


        def results


        try {

            results = request.JSON


        } catch (IOException e1) {

            log.error "ERROR WHILE request.json in /results******************************************************************"

            render contentType: "text/json", text: '{"status":"fail"}'
            return

        }

此时将抛出错误

results = request.JSON

我很欣赏你的见解。我正在使用Grails2.2

谢谢

更新：

这是完整的堆栈跟踪。谢谢

ERROR 2021-03-28 08:34:10,170 [ajp-bio-8109-exec-39783] errors.GrailsExceptionResolver: IOException occurred when processing request: [POST] /race/results/
Socket read failed. Stacktrace follows:
java.io.IOException: Socket read failed
    at java.io.FilterInputStream.read(FilterInputStream.java:133)
    at java.io.PushbackInputStream.read(PushbackInputStream.java:186)
    at java.io.InputStreamReader.read(InputStreamReader.java:184)
    at java.io.Reader.read(Reader.java:140)
    at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1485)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1461)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:1436)
    at org.apache.commons.io.IOUtils.toString(IOUtils.java:585)
    at grails.converters.JSON.parse(JSON.java:312)
    at grails.converters.JSON.parse(JSON.java:347)
    at race.results(VirtualRaceController.groovy:2011)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

您可能会发现它抛出的是ConverterException，而不是IOException。以下是代码：

class ConvertersExtension {
    static getJSON(HttpServletRequest request) {
        JSON.parse(request)
    }
}
public class JSON  {
   public static Object parse(HttpServletRequest request) throws ConverterException {
       // blah blah
       try {
            /// blah blah
       }
       catch (IOException e) {
           throw new ConverterException("Error parsing JSON", e);
       }
   }  
}

如果您使用的是IDE，右键单击相关的API，然后选择“GO To declaration”，或者IDE中的任何等效项，直到您找到抛出的内容为止