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JDK installation package cannot be downloaded directly to the server

1. Open the JDK download page using this link: Java SE Development Kit 8 Downloads

2. Select a package to download and set "Accept license agreement".

3. Insert the direct download link to the installation package you have received to the wget command line

WCS server does not start

1. Check if the server process is created.

2. Check startup.log file for JVM startup errors.

3. Check server_logs/flashphoner.log file for errors.

WCS server does not accept web clients connections (including to its own web interface)

1. Stop Firewall using the command:

sudo systemctl stop firewalld

2. Check server logs against errors.

3. Make sure you have activated the license.

4. Check the Websocket port of the server (by default 8443) with the telnet command. Make sure the server uses this exact port for Websocket. You can use the netstat Linux command and check the wss_port server setting.

5. Make a traffic dump and check if Websocket traffic goes through.

Accessing WCS web interface, browser dispalys error like

Logs contains error like

Lookup of RMI stub failed; nested exception is java.rmi.ConnectException:
Connection refused to host: localhost;
nested exception is: Connection refused

1. Check if host name is set in /etc/hosts
2. Check if host name is resolved correctly with command


3. Restart WCS