Hi

      

      We have a 3-way delta-mmr syncrepl setup (Debian Stretch with
      slapd 2.4.44+dfsg-5+deb9u1).

      2 of those 3 hosts were powered off for about 4 hours. After the
      bootup and slapd start,

      the host which was running all the time during the downtime
      started to log: 

      

          SEARCH RESULT tag=101 err=53 nentries=0 text=consumer state is
      newer than provider!

      

      Purging the accesslog database fixed the issue.

      

      Could this have happened due to a timesync problem? We noticed,
      that right after boot,

      the ntpd service was oscillating in its time offset from 0.0192 to
      0.0003 for ~3 minutes.

      

      Does somebody have experience with this?

      

      Do we need to delay slapd or force an `ntpdate` before slapd
      starts in the boot process?

      Because slapd has the following LSB headers in the init script

      

          # Required-Start:    $remote_fs $network $syslog

      

      it is started (using systemd service file autogenerated from
      init.d script) right after

      network.target has been reached and simultaneously with ntpd.
      Whereas slapd only takes

      about 1 second to start, ntpd takes about 10 seconds and it might
      even take much longer 

      to get the time in sync.

      

      Kind regards

    
--
Sven Mäder
IT Services Group
Physics Department, ETH Zurich