topic Re: Putty fatal error in Operating System - HP-UX

Putty fatal error

coollllllllllll — Tue, 01 Jan 2013 12:50:11 GMT

Hi ,

am getting these below message for one of my server hpux 11i v2 only ;

Putty fatal error ; out of memory and the session simple disconnects.

i do have in my login script something which checks for a user , only if hes allowed then allows him to login in.

Is that causing this problem ????

Re: Putty fatal error

Dennis Handly — Tue, 01 Jan 2013 14:30:30 GMT

>Putty fatal error ; out of memory

Is this a putty error or is putty simply echoing it?

Are you out of swap or heap space? Where are you running putty?

Re: Putty fatal error

coollllllllllll — Tue, 01 Jan 2013 14:38:45 GMT

Hi Dennis ,

PFA putty error.

We take a remote session of a windows machine wherein from which we login through putty on one of this server.

The server physical memory is 99% used , but swap around 85% only.

the session simply disconnects and we are left with no option then to restart everything that we had done.

Re: Putty fatal error

Dennis Handly — Tue, 01 Jan 2013 14:57:05 GMT

>We take a remote session of a windows machine

Looks like something is wrong with your windows box or putty.

Re: Putty fatal error

coollllllllllll — Tue, 01 Jan 2013 15:52:24 GMT

Hi Dennis,

I Need to upgrade putty or any windows bug known if any ??

Re: Putty fatal error

Dennis Handly — Tue, 01 Jan 2013 16:42:38 GMT

>I need to upgrade putty?

I'm using 0.62.

I have connections that drop all of the time when idle but not with "out of memory" and I'm inclined to blame the server, network or IT?

Re: Putty fatal error

coollllllllllll — Tue, 01 Jan 2013 16:17:28 GMT

Hi Dennis ,

By server are you referring to this point menitoned in this link below;

http://h30499.www3.hp.com/t5/Security/PuTTY-Fatal-Error-Message-Box-using-SSH/td-p/4208970

Mel Burslan

"many possibilities exists as the cause of this error but looking at the "Server unexpectedly closed network connection" message, there may be a mechanism to prevent users from directly logging into application service accounts like oracle9i. There might be an implied expectancy that user login to his own personal account then su into this account. Is there such a mechanism implemented on your servers ? Can this user login to any other accounts using the same workstation and same putty setup ?"

Re: Putty fatal error

Dennis Handly — Wed, 02 Jan 2013 03:00:22 GMT

>By server are you referring to this point mentioned in this link below

I don't think it's the same message, I'll have to remember it next time.

I can always login to my Linux servers, so it isn't this login check.

The putty error I get is:

Network error: Software caused connection abort

I'm also using ssh, are you?

Re: Putty fatal error

coollllllllllll — Tue, 01 Jan 2013 17:01:27 GMT

Hi Dennis,

Yaa we are also using ssh.

Just now am being updated that its been observed for 2 more servers too.

So now total 3 servers.

the same ,

"out of memory" putty message.

Re: Putty fatal error

Dennis Handly — Tue, 01 Jan 2013 17:48:04 GMT

>So now total 3 servers.

From the same PC?

Re: Putty fatal error

coollllllllllll — Tue, 01 Jan 2013 17:49:35 GMT

Yaa from the same machine.

Re: Putty fatal error

Dennis Handly — Wed, 02 Jan 2013 03:04:33 GMT

>Yaa from the same machine.

Perhaps you need to restart it?

Task manager says my putty.exe is only taking 3.8 to 4.5 MB each.

How many scroll lines to you have?

Re: Putty fatal error

coollllllllllll — Wed, 02 Jan 2013 08:34:06 GMT

Hi Dennis,

Scroll lines size is 2000000000

Re: Putty fatal error

Patrick Wallek — Wed, 02 Jan 2013 08:38:10 GMT

>>Scroll lines size is 2000000000

You're really trying to keep 2 BILLION lines in the scroll back buffer? That seems very excessive and, depending on how many lines you are actually storing in the buffer for each terminal, possibly the reason you are getting out memory errors.

I would try setting that value to something much more reasonable, like 10000, and see what happens.

Re: Putty fatal error

coollllllllllll — Wed, 02 Jan 2013 09:30:02 GMT

Hi Patrick ,

What can be the max permissible size ?

Because sometimes we need to refer above lines , during our batch job sessions every night.

Re: Putty fatal error

Dennis Handly — Wed, 02 Jan 2013 12:00:55 GMT

>What can be the max permissible size?

It depends on the number of putty sessions and how many lines are saved.

Have you looked at putty.exe in Task Manager to see how much memory is being used?

(Of course if the lines are saved in a file, then the size won't matter for memory usage, depending how window scrolling works?)

>Because sometimes we need to refer above lines, during our batch job sessions every night.

Batch jobs typically don't go to a session stdout/stderr, they go to a file. If in a file, you can use your favorite editor to look at them.

Or you could use script(1) to record everything in a file and then cut the scroll lines to a smaller value.

Oh, putty also has logging.

Re: Putty fatal error

coollllllllllll — Wed, 16 Jan 2013 05:51:28 GMT

Hi Dennis and Patrick ,

Thanks scroll lines was the culprit.

Reduced to 200000 now , until now all fine.