VirtualHost Alias loads / redirects with "/myapp/" but errors without slash "/myapp" - virtualhost

Question

I have a VirtualHost Alias path that loads / redirects with "/myapp/" but not "/myapp".
My sever info:
OS: Red Hat Enterprise Linux Server 7.6 (Maipo)
Kernel: Linux 3.10.*
My /etc/httpd/conf.d/main.conf file:
<VirtualHost *:80>
Alias /myapp /m009/www/myapp-source
<Directory /m009/www/myapp-source >
Options Indexes FollowSymlinks MultiViews
AllowOverride All
Require all granted
</Directory>
</VirtualHost>
If I go to mydomain.com/myapp/ (note the extra slash), I get:
Here's the app!
If I go to mydomain.com/myapp (no extra slash), I get:
- takes a long time to load
- redirects to mydomain:9080/myapp
- says "site can’t be reached"

Answer 1

I am not sure this is the correct answer as I do not know all the information.
Are you running an app on port 9080. Could it help to put ProxyPass /myapp ! to the virtualHost?
Sorry if not.

Answer 2

Alias is for exactly matching a path, so you have three options:
Add a second Alias statement with a trailing slash. This could be bad because you'll have multiple paths to the same resource. e.g. Alias /myapp/ /m009/www/myapp-source
Use AliasMatch to match the path with or without a trailing slash. e.g.
AliasMatch "/myapp/?" "/m009/www/myapp-source"
[Recommended] Rewrite requests to remove a trailing slash. Beware that this could cause a loop depending on how your Apache installation is set up. Check if DirectorySlash is on or off first.
<VirtualHost *:80>
RewriteEngine on
RewriteRule ^(.*)/+$ $1 [R=301,L]
Alias /myapp /m009/www/myapp-source
<Directory /m009/www/myapp-source >
Options Indexes FollowSymlinks MultiViews
AllowOverride All
Require all granted
</Directory>
</VirtualHost>