I am tring to upgrade ldap2 server I saw this  messages;

[29/May/2017:11:35:48.682669408 +0300] slapd shutting down - signaling operation threads - op stack size 166 max work q size 135 max work q stack size 135
[29/May/2017:11:35:48.690952202 +0300] slapd shutting down - closing down internal subsystems and plugins
[29/May/2017:11:35:49.872175332 +0300] NSMMReplicationPlugin - agmt="cn=mhrsldap2-mhrsldap1" (172:389): Warning: Attempting to release replica, but unable to receive endReplication extended operation response from the replica. Error -5 (Timed out)
[29/May/2017:11:35:50.060265381 +0300] Waiting for 4 database threads to stop
[29/May/2017:11:35:51.008788537 +0300] All database threads now stopped
[29/May/2017:11:35:51.021523201 +0300] slapd shutting down - freed 135 work q stack objects - freed 166 op stack objects
[29/May/2017:11:35:51.974432991 +0300] slapd stopped.
[29/May/2017:11:35:54.648763978 +0300] check_and_set_import_cache: pagesize: 4096, pages: 2001763, procpages: 2933
[29/May/2017:11:35:54.651378439 +0300] Import allocates 2860044KB import cache.
[29/May/2017:11:35:54.652443493 +0300] Upgrade DN Format - NetscapeRoot: Start upgrade dn format.
[29/May/2017:11:35:54.654011238 +0300] Upgrade DN Format - Instance NetscapeRoot in /var/lib/dirsrv/slapd-mhrsldap/db/NetscapeRoot is up-to-date
[29/May/2017:11:35:54.874089044 +0300] check_and_set_import_cache: pagesize: 4096, pages: 2001763, procpages: 2934
[29/May/2017:11:35:54.876137518 +0300] Import allocates 2859732KB import cache.
[29/May/2017:11:35:54.877121520 +0300] Upgrade DN Format - userRoot: Start upgrade dn format.
[29/May/2017:11:35:54.878978734 +0300] Upgrade DN Format - Instance userRoot in /var/lib/dirsrv/slapd-mhrsldap/db/userRoot is up-to-date
[29/May/2017:11:35:55.351168914 +0300] 389-Directory/1.3.5.10 B2017.145.2037 starting up
[29/May/2017:11:35:55.375878667 +0300] resizing db cache size: 20000000 -> 10000000
[29/May/2017:11:35:55.559740675 +0300] slapd started.  Listening on All Interfaces port 389 for LDAP requests