Develop Reference

URI for connecting to Heroku WebSocket endpoint

We have a Java web application at http://ourapp.com hosted at Heroku and the frontend of the app cannot connect to the WebSocket endpoint (endpoint) running in a Heroku dyno. We have tried these URIs:
ws://ourapp.com/endpoint
ws://ourapp.com:80/endpoint
ws://ourapp.com:8080/endpoint
ws://ourapp.com:8084/endpoint
ws://ourapp.com:443/endpoint
wss://ourapp.com/endpoint
wss://ourapp.com:80/endpoint
wss://ourapp.com:8080/endpoint
wss://ourapp.com:8084/endpoint
wss://ourapp.com:443/endpoint
None of the above open a connection. What are we missing here?
PS: I have set up a test ground: http://vakuutustiedot-dev.herokuapp.com/websocket.test.html (the URI is PROTOCOL:vakuutustiedot-dev.herokuapp.com:PORT/trial)
The target app runs in a Heroku Apache Tomcat 8.5.38.
What comes to the port number, I am not sure how to get one.

Perhaps you have missed adding the support of WebSockets to Heroku, like in this answer (https://stackoverflow.com/a/50002416/11197115)?

Maybe you should try configuring the proxy attribute of devServer. This attribute is used when the frontend app and backend api are not running on the same host. Perhaps the below setting might solve your problem.
module.exports = {
devServer: {
proxy: 'ws://ourapp.com:8080/endpoint'
}
}
For more info see the docs: https://cli.vuejs.org/config/#devserver

Keycloak server behind Jetty reverse proxy

I have embedded Jetty running on port 7000. Also, I have a keycloak server running on same machine on port 8100.
My all clients access goes via Jetty i.e. localhost:7000. So, I have put keycloak as reverse proxy on Jetty i.e localhost:7000/keycloak/auth will redirect to localhost:8100/auth. It is hitting correctly.
Now, there is KeycloakInstalled client to authenticate the user. I have provided auth-url as http://localhost:7000/keycloak/auth. When I run this client, it correctly authenticate the user, but when retruning the token, it gives out the exception that auth-url (localhost:7000/keycloak/auth) given to it does not match the url from keycloak sever (localhost:8100/auth).
I tried out doing following also:
https://www.keycloak.org/docs/1.9/server_installation_guide/topics/clustering/load-balancer.html
But, I am unable to generate X-Forward headers from Jetty.
Am I doing any basic thing wrong here?
Any pointers here would be very helpful.
Thanks.

I workaround it by mapping http://localhost:7000/auth (not localhost:7000/keycloak/auth) to http://localhost:8100/auth via Jetty reverse proxy. It worked perfectly.
P.S. I also need to add proxy-address-forwarding="true" in keycloak standalone.xml

WebSphere Issue

I working in an Java application. I am using Struts2 and Hibernate. The application was working fine in Tomcat7 , But when I deployed that On IBM"S Websphere I am getting the following error for the following URL
http://localhost:8080/MYAPPS
Error 404: There is no Action mapped for action name .
http://localhost:8080/MYAPPS/
Error 404: There is no Action mapped for namespace [/] and action name [] associated with context path

The default port is 9080. Change the port in url as others suggested.

Check the following:
Login to the console , click on servers -> serverName -> ports -> WC_defaulthost (webcontainer port )
For example if it shows as 9080
Click on Environment -> Virtual Host -> default host (or the host the application is mapped to)- > Click on Host Aliases . Make sure the port is defined, if not add the port and the restart the server.
access the application as follow.
http://localhost:9080/MYAPPS/
http://hostname:9080/MYAPPS/
If the problem persists, open the systemout.log file and look for more details.

Try this, it may help to find the port number for web host or secure web host,
Go for the following path,
/opt/IBM/WebSphere/AppServer/profiles/Dmgr01_demo/config/cells/localhostCell01/nodes/Dmgr_node,
try find this file serverindex.xml,
there you can find the "WC_adminhost" port number.
Hope this help !
thanks!.

I don't think this is the virtual host issue. You obviously have configured it right as there's no virtualhost error.
What's your WAS's version? WAS V6.1.X has the notorious reputation not to support whatever is popular. Try adding this as a customized web container property:
com.ibm.ws.webcontainer.invokefilterscompatibility
set its value to true

How to change default WAS liberty server port 9080 to other port number in RAD?

When I am using WAS Liberty profile V8.5 beta, I can not find anywhere to change default service port 9080 in RAD, I tried to add httpendpoint section in server.xml, liberty server reports configuration update successful, but got failure when running web application.
Anybody knows how to solve this? Thanks!

There was a bug in the beta which prevented some port changes from being preserved when the server was restarted. There is a forum thread discussing the issue with the cached port value, and the answer is to start the server with the --clean option (from the command line), there is an equivalent checkbox available when you start the server via the tools.
[1] https://www.ibm.com/developerworks/forums/thread.jspa?messageID=14770100
I would start there.

Sun Directory Server can't connect ldap server

I'am installing ArcGisServer for the Java plataform on Centos 5.5 x86_64, this is not a supported platform but I have overcome almost every problem preventing the success of the installation. It uses exhaustively Sun Directory Server. The last error i receive was:
ldap_simple_bind: Can't connect to the ldap server - No route to host
It happens in other applications which makes uses of it, so it seems to be an specific problem of Sun Directory Server on linux and solaris. There is no reported solution. Usually I search the problem as much as I can but this time I have reached my patience and I need it working as soon as posible. I recognize this as an excellent forum because of it's community and quality of answers, ¿can anybody help me with this?

The "No route to host" error suggests that the issue is one of network connectivity between your ArcGIS server (the Sun Directory Server component, as you mention) and the LDAP server. So, a few things to examine, in order:
Do you have an LDAP server set up and running?
Is your LDAP server reachable from your Centos machine outside of the ArcGis server?
Is your ArcGis configured with the correct address to the LDAP server - should be in the web.config file? Example below:
<connectionStrings>
<add name="ADConnectionString"
connectionString="LDAP://SERVER_LDAP:389/ou=Sigestredi,o=Sicondef,dc=aplicaciones,o=mdef,c= es" />
</connectionStrings>
Disclaimer: I don't know anything about the ArcGIS server per se - I'm just diagnosing the "no route to host error" with a few snippets I picked up from some quick searches of the ArcGis forums.

ArcGIS includes a Sun Directory Server on it, so arcgis server and ldap are on the same machine. The port is set to 62000. When I run the diagnostic tool the DG028 fails:
DG028 - check LDAP server: is listening
I made a prove using nmap as:
nmap localhost -p62000
And it says it is opened. I don't know how to verify if LDAP is up and running, the startup log doesn't show anything wrong. I have found a config file named ldap.conf:
url ldap://name.subdomain.domain:62000/dc=name,dc=arcgis
admnm agsadmin
And my /etc/hosts is:
127.0.0.1 localhost localhost
ip_direction name.subdomain.domain name.subdomain.domain
I don't have an alias for "name", so:
ping name.subdomain.domain
Works
But:
ping name
Doesn't work
I have never used ldap so I don't know what should be on "dc". Could my hosts file be malformed or is my ldap.conf?
Another information is that the computer I am using is part of a domain. When I installed Centos, /etc/hosts file had an alias for the loopback interface as localhost.localdomain but i removed it.
I would appreciate any help.

I have solved my problem, the problem was on my /etc/hosts file. I added an alias for my ip direction:
127.0.0.1 localhost localhost
ip_direction name.subdomain.domain name
Then I run the ServerConfig script. This is a successful installation of ArcGIS Server for the Java platform on Linux. Thanks Greg for your guide.