理解“请求头太大”

Question

我在Tomcat中遇到了这个错误

org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
 Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.
 java.lang.IllegalArgumentException: Request header is too large
    at org.apache.coyote.http11.Http11InputBuffer.parseHeaders(Http11InputBuffer.java:583)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:703)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

我想要理解文本further occurrences of HTTP header parsing errors will be logged at DEBUG level。这是否意味着解析错误将在一段时间内被抑制，或者只针对特定的请求。有人能给我这个意思的权威来源吗？

Answer 1

就像消息上说的那样。将在调试级别记录此错误的所有其他实例。不适用于该请求，并且在一段时间内也不适用。从现在到时间的尽头。或者下一次服务器重新启动时，以先到者为准。

可以在这里的1144行的源代码中看到这一点：https://github.com/apache/tomcat/blob/7.0.x/java/org/apache/coyote/http11/AbstractHttp11Processor.java