Directory service (dirsrv) is failing to start on RHEL 8 IPA server with an error - PR_Bind() on All Interfaces port 389 failed: Netscape Portable Runtime error -5982

Issue

• Unable to start IPA services due to failure in dirsrv service:

[root@ipaserver-rh8 ~]# ipactl status
Directory Service: STOPPED
Directory Service must be running in order to obtain status of other services

[root@ipaserver-rh8 ~]# systemctl status dirsrv@EXAMPLE-LOCAL.service
● dirsrv@EXAMPLE-LOCAL.service - 389 Directory Server EXAMPLE-LOCAL.
   Loaded: loaded (/usr/lib/systemd/system/dirsrv@.service; enabled; vendor preset: disabled)
  Drop-In: /usr/lib/systemd/system/dirsrv@.service.d
           └─custom.conf
           /etc/systemd/system/dirsrv@EXAMPLE-LOCAL.service.d
           └─ipa-env.conf
   Active: failed (Result: exit-code) since Tue 2022-08-23 16:46:26 IST; 4s ago
  Process: 19925 ExecStart=/usr/sbin/ns-slapd -D /etc/dirsrv/slapd-EXAMPLE-LOCAL -i /run/dirsrv/slapd-EXAMPLE-LOCAL.pid (code=exited, status=1/FAILURE)
  Process: 19920 ExecStartPre=/usr/libexec/dirsrv/ds_selinux_restorecon.sh /etc/dirsrv/slapd-EXAMPLE-LOCAL/dse.ldif (code=exited, status=0/SUCCESS)
  Process: 19914 ExecStartPre=/usr/libexec/dirsrv/ds_systemd_ask_password_acl /etc/dirsrv/slapd-EXAMPLE-LOCAL/dse.ldif (code=exited, status=0/SUCCESS)
 Main PID: 19925 (code=exited, status=1/FAILURE)

Aug 23 16:46:26 ipaserver-rh8.example.local systemd[1]: Starting 389 Directory Server EXAMPLE-LOCAL....
Aug 23 16:46:26 ipaserver-rh8.example.local ns-slapd[19925]: [23/Aug/2022:16:46:26.807507844 +051800] - ERR - createprlistensockets - PR_Bind() on All Inter>
Aug 23 16:46:26 ipaserver-rh8.example.local systemd[1]: dirsrv@EXAMPLE-LOCAL.service: Main process exited, code=exited, status=1/FAILURE
Aug 23 16:46:26 ipaserver-rh8.example.local systemd[1]: dirsrv@EXAMPLE-LOCAL.service: Failed with result 'exit-code'.
Aug 23 16:46:26 ipaserver-rh8.example.local systemd[1]: Failed to start 389 Directory Server EXAMPLE-LOCAL..

• dirsrv service on IPA server is failing to start with following error in /var/log/dirsrv/slapd-INSTANCE/errors log file:

[root@ipaserver-rh8 ~]# tail -1 /var/log/dirsrv/slapd-EXAMPLE-LOCAL/errors
[23/Aug/2022:12:20:40.351027381 +051800] - ERR - createprlistensockets - PR_Bind() on All Interfaces port 389 failed: Netscape Portable Runtime error -5982 (Local Network address is in use.)  <----