The issue is when I try to log in the server using SSh , it's not responding and cannot be pinged. And when I go to the console and reboot the server, its stuck in the reboot process. How Can this issue be resolved.
Your question contains too little information to provide any good tip. It looks like it is a systemd based linux derivate that fails to switch onto the root partition during the boot process. Which seems to cause that systemd stops (SIGTERM) the systemd-jourald which is taking care of journal logs.
At this point during the boot process, networking is not even setup, so you can forget any attempt to connect via ssh or any other network protocol. The machine does not even have an ip assigned.
This might help to find the issue:
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 38: Applying options for * debug2: resolving "server" port 22 debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to server[server] port 22. debug1: connect to address server port 22: Connection timed out ssh: connect to host server port 22: Connection timed out