https://bz.apache.org/bugzilla/show_bug.cgi?id=68878
Bug ID: 68878
Summary: Tomcat feints death, there is no ClientPoller thread
in the stack information
Product: Tomcat 9
Version: 9.0.39
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: WebSocket
Assignee: dev@tomcat.apache.org
Reporter: huangzeling8...@dingtalk.com
Target Milestone: -----
HandlerInterceptor.afterCompletion thread exception appears online
Java. lang. NullPointerException: null
At org. springframework. boot. actor. metrics. web. Servlet
LongTaskTimingHandlerInterceptor. stopLongTaskTimers
(LongTaskTimingHandlerInterceptor. java: 123)~[spring boot actor 2.3.5.
RELEASE. jar!/: 2.3.5. RELEASE]
At org. springframework. boot. actor. metrics. web. Servlet
LongTaskTimingHandlerInterceptor. afterCompletion
(LongTaskTimingHandlerInterceptor. java: 79),
Upon checking the stack information, it was found that the thread of
ClientPoller in Tomcat was missing. Tomcat experienced a fake death situation
without any access log. I suspect it may be related to websocket, as a
websocket client disconnected and experienced the following situation
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