Tomcat 11.0.18 - java.lang.AssertionError in Mapper#internalMap

Hi,

eventually while reading logs from my container I stumbled over this
one:


Exception in thread "https-jsse-nio-8443-exec-18" java.lang.AssertionError
	at org.apache.catalina.mapper.Mapper.internalMap(Mapper.java:713)
	at org.apache.catalina.mapper.Mapper.map(Mapper.java:675)
	at org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:692)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
	at org.apache.coyote.http2.StreamProcessor.service(StreamProcessor.java:459)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.http2.StreamProcessor.process(StreamProcessor.java:102)
	at org.apache.coyote.http2.StreamRunnable.run(StreamRunnable.java:35)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:946)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:480)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:57)
	at java.base/java.lang.Thread.run(Unknown Source)


Anyone an idea how this would happen, what might have gone wrong?

It did just happen only once, I have no reproducer and no idea which
request might have triggered this, but I am curious about that trace.

kind regards


Torsten