Public bug reported:
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.
** Affects: openldap (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1926265
Title:
slapd enter in infinite loop on sched_yield syscall
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