java - 了解 "Request Header is too large"

Question

我在 Tomcat 中遇到此错误

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)

我想了解文本进一步出现的 HTTP header 解析错误将在 DEBUG 级别记录。这是否意味着解析错误将在一段时间内被抑制，或者仅针对该特定请求。谁能给我这个含义的权威来源？

Answer 1

正如消息所说的那样。此错误的所有进一步实例都将记录在 DEBUG 级别。不是针对该请求，也不是在一段时间内。从现在开始，直到时间的尽头。或者下次服务器重新启动时，以先到者为准。

您可以在源代码第 1144 行看到这一点: https://github.com/apache/tomcat/blob/7.0.x/java/org/apache/coyote/http11/AbstractHttp11Processor.java