“Fatal NI Connect Error 12516″ and ”TNS-12564: TNS:connection refused” In Clusterware Alert.log when ologgerd Connects to GIMR

ISSUES

There are repeating following errors in 19c CRS alert.log by ologgered trying to connect to GIMR.

Fatal NI connect error 12516, connecting to:
(DESCRIPTION=(CONNECT_TIMEOUT=60)(ADDRESS=(PROTOCOL=tcp)(HOST=racnode-cluster-scan.virtuallab)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=GIMR_DSCREP_10)(CID=(PROGRAM=ologgerd)(HOST=racnode1.virtuallab)(USER=root)))(SECURITY=(ENCRYPTION_CLIENT=requested)))
VERSION INFORMATION:
TNS for Linux: Version 19.0.0.0.0 - Production
TCP/IP NT Protocol Adapter for Linux: Version 19.0.0.0.0 - Production

Version 19.8.0.0.0
Time: 08-AUG-2020 18:15:01
Tracing not turned on.
Tns error struct:
ns main err code: 12564

TNS-12564: TNS:connection refused
ns secondary err code: 12560
nt main err code: 524

TNS-00524: Current operation is still in progress
nt secondary err code: 115
nt OS err code: 0

INVESTIGATION

Check mgmtlsnr or SCAN listeners, and found -MGMTDB PDB service ” gimr_dscrep_10″ is not registered properly.

[grid@racnode1 trace]$ lsnrctl services listener_scan2
...
..
.
Service "gimr_dscrep_10" has 1 instance(s).
Instance "-MGMTDB", status READY, has 1 handler(s) for this service…
Handler(s):
"DEDICATED" established:0 refused:0 state:blocked
REMOTE SERVER
(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.100.62)(PORT=1526))

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