@swathib5076  : It sounds like there might be a few issues causing Pega Infinity to not start on port 9001. Here are some steps you can take to troubleshoot the problem:

1. **Check if the port is already in use:** Ensure that no other services are running on port 9001. You can do this by checking the Tomcat's `server.xml` file and ensuring no other services are using this port.

2. **Verify the hostname and port configuration:** Make sure that the hostname and port are correctly configured and that the postmaster is accepting TCP/IP connections.

3. **Ensure the database is running:** Pega requires the database to be started and running before it can bootstrap. Verify that your database is up and running

4. **Restart Tomcat:** Try using a different port in `server.xml` and restarting your Tomcat server

5. **Check for connectivity issues:** Ensure there are no connectivity issues between the constellation service and the Pega server. This can include checking firewall rules and SSL certificate issues.

If these steps do not resolve the issue, you may want to contact Pega support for further assistance  

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Issue - Installation of two versions of Pega 7 Personal Editions