I am facing issue with uptime. Two of my servers are showing wrong uptime, i tried re-boot also but no effect

#uptime

11:52am up 4202 day(s), 10:13, 3 users, load average: 3.45, 3.23, 3.28

# uptime

11:53am up 4202 day(s), 9:47, 2 users, load average: 4.23, 4.16, 4.17

Why do you think the uptime shown is wrong? The second one I can see, especially if it's after a reboot, but what's wrong with the first one?

Well, I don't know why it is displaying the wrong uptime, but don't you think that a server uptime of more than 11 years (4202 days) would be rather astonishing, especially after a reboot?

That's what I meant about the second result. This is Linux, 11 years is not surprising

Nope, it is Solaris, since this is the Solaris forum.

Dagnabbit. Does that mean that long uptime is unheard of in the Solaris world? *ducks*

There are Windows NT servers with very very long uptime. What does that prove? That those WinNT servers are not doing any demanding work. They just sit there and do small things, like file server, printer server, etc. I can boot an MS-DOS computer and just let it sit there for 20 years, without connection to internet. Does that prove that MS-DOS is the most stable OS out there? No. The interesting thing is, what did those servers do? Are they doing any thing non-trivial, or just sit there and idling?

I think OpenVMS servers have the best uptime, they measure in decades. After that, Unix (AIX, Solaris, HP-UX). After that, Linux. After that, Windows. Now I am talking about non trivial server tasks. Not trivial server tasks.

Unless either you last reboot them on Jan 01 2000 or your system clock has been set to Jan 4 2023, I would say the /var/adm/wtmpx file has been corrupted on both of these servers. Should you want to see its content in clear text, you can convert it to ascii with this command:
For a quick fix, I would suggest you to just clear the wtmpx file and reboot.

Could be that the system battery is shot and needs replacing. When rebooted, the system is losing it's time, reverting to 1999. Then during boot it's time is updated by NTP, jumping from 1999 to 2011.