Tomcat logs frequent 400s in the access log from traffic on the https port
Issue
- After upgrading to Tomcat 9, we see access log entries like below for 400 responses without any request details:
10.xx.xx.x [09/Jul/2020:04:25:35 +0000] - 10.xx.xx.x null cookie:- request:- null null 400 - 0
- This is seen repeatedly when we have a TCP probes hitting our https port as a healthcheck
Environment
- JBoss Web Server (JWS) 5.x
- Tomcat 9.0.x
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.