host [:] is not valid error in catalina.out

[Kushagra Bindal]

Hi,

I tried to upgrade my tomcat on OpenAM from 8.5.24 to 9.0.29 version and I
got below error in catalina.out during startup itself.

[http-nio-8080-exec-7] org.apache.coyote.AbstractProcessor.parseHost The
host [:] is not valid
 Note: further occurrences of request parsing errors will be logged at
DEBUG level.
        java.lang.IllegalArgumentException
                at
org.apache.tomcat.util.http.parser.Host.parse(Host.java:78)
                at
org.apache.tomcat.util.http.parser.Host.parse(Host.java:45)
                at
org.apache.coyote.AbstractProcessor.parseHost(AbstractProcessor.java:294)
                at
org.apache.coyote.http11.Http11Processor.prepareRequest(Http11Processor.java:759)
                at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:343)
                at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
                at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
                at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)
                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)

Can someone please help in identifying the actual root cause of the failure.
-- 
Regards,
Kushagra Bindal