Opened 8 years ago

Closed 8 years ago

#928 closed error (fixed)

"PTY allocation request failed" logging into PUMA

Reported by: kipling Owned by: um_support
Component: PUMA Keywords:
Cc: Platform:
UM Version:


This morning, when I ssh to PUMA, I get the error message

"PTY allocation request failed on channel 0"

following which the shell never starts.

(I was seeing a similar message yesterday evening when submitting jobs to MONSooN, but wrongly attributed this to the aftermath of the MONSooN outage at the time, until I saw it this morning when ssh-ing in from Oxford.)

IIRC at least some versions of linux have a tweakable kernel parameter for the maximum number of PTYs available (although I thought this was done dynamically on modern kernels…) I guess with so many users, PUMA needs quite a lot!

Change History (1)

comment:1 Changed 8 years ago by andy

  • Resolution set to fixed
  • Status changed from new to closed

Hi Zak,

PUMA went off the rails last night. A quick reboot this morning seems to have fixed the problem.



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