Spring Boot 2.6.x
May 11 14:08:41 ubuntu java[1831]: 2022-05-11 14:08:41.239 INFO 1831 --- [nio-2023-exec-7] o.apache.coyote.http11.Http11Processor : Error parsing HTTP request header
May 11 14:08:41 ubuntu java[1831]: Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
May 11 14:08:41 ubuntu java[1831]: java.lang.IllegalArgumentException: Invalid character found in method name [0xff0x0a0x00D0x000x080xc10xff...]. HTTP method names must be tokens
May 11 14:08:41 ubuntu java[1831]: at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:419)
May 11 14:08:41 ubuntu java[1831]: at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:271)
May 11 14:08:41 ubuntu java[1831]: at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
May 11 14:08:41 ubuntu java[1831]: at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
May 11 14:08:41 ubuntu java[1831]: at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
May 11 14:08:41 ubuntu java[1831]: at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
May 11 14:08:41 ubuntu java[1831]: at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
May 11 14:08:41 ubuntu java[1831]: at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
May 11 14:08:41 ubuntu java[1831]: at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
May 11 14:08:41 ubuntu java[1831]: at java.base/java.lang.Thread.run(Thread.java:833)
May 11 14:39:04 ubuntu java[1831]: 2022-05-11 14:39:04.939 INFO 1831 --- [nio-2023-exec-3] o.apache.coyote.http11.Http11Processor : Error parsing HTTP request header
May 11 14:39:04 ubuntu java[1831]: Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
May 11 14:39:04 ubuntu java[1831]: java.lang.IllegalArgumentException: Invalid character found in the HTTP protocol [RTSP/1.00x0d0x0a0x0d0x0a...]
May 11 14:39:04 ubuntu java[1831]: at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:570)
May 11 14:39:04 ubuntu java[1831]: at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:271)
May 11 14:39:04 ubuntu java[1831]: at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
May 11 14:39:04 ubuntu java[1831]: at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
May 11 14:39:04 ubuntu java[1831]: at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
May 11 14:39:04 ubuntu java[1831]: at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
May 11 14:39:04 ubuntu java[1831]: at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
May 11 14:39:04 ubuntu java[1831]: at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
May 11 14:39:04 ubuntu java[1831]: at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
May 11 14:39:04 ubuntu java[1831]: at java.base/java.lang.Thread.run(Thread.java:833)
注意例外部位：
method name [0xff0x0a0x00D0x000x080xc10xff...],
HTTP protocol [RTSP/1.00x0d0x0a0x0d0x0a...]
這些必須是隨機傳入的攻擊請求。
有什么辦法可以防止這些例外日志？
uj5u.com熱心網友回復：
這是一個經常重啟的服務嗎？就像，你收到一個啟動 Tomcat 的請求，然后關閉，然后重新啟動另一個請求？
每次運行時，Tomcat 只會在該INFO級別記錄一次您在上面看到的訊息，之后的訊息將在該DEBUG級別記錄（就像訊息所說的那樣）：
Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
所以它不會記錄每個錯誤......只是每次重新初始化 HttpProcessor 時的第一個錯誤。
如果這些日志訊息令人討厭，您有幾個選擇：
- 調查為什么你會收到這樣的損壞請求并嘗試將它們最小化（修復損壞的客戶端？使用防火墻？）
- 讓 Tomcat 運行更長時間；您的日志中會出現更少的錯誤
- 將 org.apache.coyote.http11.Http11Processor 記錄器的日志級別設定為
ERROR
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