Thanks for the further investigation, Stephane and Ryan.  Much
appreciated!

It would be interesting to know if lincvz could test an openldap built
with Ryan's patch, to check if he can still reproduce the bug with it.
I am going to prepare a PPA with Ryan's patch and let you know ASAP.

Ryan, IIUC the patch you're proposing fixes the issue experienced by
Stephane, but we're not entirely sure that it's the same issue being
reported in this bug.  Am I right?

If that's correct, and if we verify that lincvz can still reproduce the
bug even with the fix proposed by Ryan, then the best way forward would
be for Stephane to open a new bug so that I can act on it.

Thanks.

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to openldap in Ubuntu.
https://bugs.launchpad.net/bugs/1926265

Title:
  slapd enter in infinite loop on sched_yield syscall

Status in openldap package in Ubuntu:
  Confirmed

Bug description:
  On a production server, sometimes slapd become unbresponsive, some threads 
loops in sched_yield syscall and consumme all CPU.
  To recover, slapd needs to restart.
  No related information is reported in log file.
  All same issues in OpenLDAP upstream project are old and fixed.
  So maybe this issue affects only Ubuntu package.
  It occurs randomly, so I have no steps to reproduce.

  
  OS : Bionic

  Openldap version:

  libldap-2.4-2:amd64                    2.4.45+dfsg-1ubuntu1.10                
         
  libldap-common                         2.4.45+dfsg-1ubuntu1.10                
         
  slapd                                  2.4.45+dfsg-1ubuntu1.10                
         

  Modules loaded:

  olcModuleLoad: {0}back_bdb
  olcModuleLoad: {1}syncprov
  olcModuleLoad: {2}back_monitor
  olcModuleLoad: {3}memberof.la
  olcModuleLoad: {4}refint.la
  olcModuleLoad: {5}rwm
  olcModuleload: {6}back_ldap

  
  Backend is BDB. slapd run in (single) master - (multi) slave mode.

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