[Bug 1868587] Re: Module 'pg_autoscaler' has failed: division by zero

[Thiago Martins]

I'm seeing this on the latest Ubuntu 20.04.1, fully upgraded.

Ceph version 15.2.3-0ubuntu0.20.04.2.

The `ceph status` is "HEALTH_ERR", Module 'pg_autoscaler' has failed:
division by zero, 1 daemons have recently crashed.

:-(

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Title:
  Module 'pg_autoscaler' has failed: division by zero

Status in ceph package in Ubuntu:
  Fix Released

Bug description:
  While enabling Ceph RadosGW on Bionic/Ussuri I have run into
  intermittent failures which appear to be caused by the PG autoscaler.

  HEALTH_ERR Module 'pg_autoscaler' has failed: division by zero

  It has recently been fixed upstream [0][1] and I do not think we have
  this in our packages.

  0: https://github.com/ceph/ceph/commit/4a45b438c8921e47e329fb04535f8ecedf2a3051
  1: https://github.com/ceph/ceph/pull/33420/commits/1db33f7785bc189df65aabd4b2459aa629009584

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