Quay 3.6.0 Clair APP POD was failed to rolling update caused by PSQL error "FATAL: sorry, too many clients already"

oc get pod
NAME                                           READY   STATUS              RESTARTS   AGE
quayv360-clair-app-55858bd7c8-blrkv            0/1     CrashLoopBackOff    4          2m22s
quayv360-clair-app-55858bd7c8-mh6tm            0/1     CrashLoopBackOff    4          2m22s
quayv360-clair-app-55858bd7c8-skm94            1/1     Running             2          12m
quayv360-clair-app-55858bd7c8-xjt97            1/1     Running             2          13m
quayv360-clair-postgres-78f8ff5799-8wtqg       1/1     Running             0          9m52s
quayv360-quay-app-586bf6d878-7p6gk             1/1     Running             2          12m
quayv360-quay-app-586bf6d878-kln28             1/1     Running             2          13m
quayv360-quay-app-upgrade-g2cdc                0/1     ContainerCreating   0          5s
quayv360-quay-config-editor-7fc8ccf7f4-vtbxg   1/1     Running             0          13m
quayv360-quay-database-7bb7b4f6ff-bg9zf        1/1     Running             0          12m
quayv360-quay-mirror-844b758c77-pqtcg          1/1     Running             0          12m
quayv360-quay-mirror-844b758c77-tbkjv          1/1     Running             0          12m
quayv360-quay-postgres-init-x6qwb              0/1     Completed           0          7s
quayv360-quay-redis-54659f4454-9ctm7           1/1     Running             0          13m


oc logs quayv360-clair-app-55858bd7c8-blrkv
{"level":"info","component":"main","version":"v4.3.0","time":"2021-10-09T06:17:58Z","message":"starting"}
{"level":"info","component":"main","version":"v4.3.0","time":"2021-10-09T06:17:58Z","message":"ready"}
{"level":"info","component":"main","time":"2021-10-09T06:17:58Z","message":"launching introspection server"}
{"level":"info","component":"main","time":"2021-10-09T06:17:58Z","message":"launching http transport"}
{"level":"info","component":"introspection/New","address":":8089","time":"2021-10-09T06:17:58Z","message":"no introspection address provided; using default"}
{"level":"info","component":"initialize/Services","time":"2021-10-09T06:17:58Z","message":"begin service initialization"}
{"level":"warn","component":"introspection/New","time":"2021-10-09T06:17:58Z","message":"no health check configured; unconditionally reporting OK"}
{"level":"info","component":"introspection/Server.withPrometheus","endpoint":"/metrics","server":":8089","time":"2021-10-09T06:17:58Z","message":"configuring prometheus"}
{"level":"info","component":"introspection/New","time":"2021-10-09T06:17:58Z","message":"no distributed tracing enabled"}
{"level":"info","component":"main","time":"2021-10-09T06:17:58Z","message":"registered signal handler"}
{"level":"info","component":"initialize/Services","time":"2021-10-09T06:17:58Z","message":"end service initialization"}
{"level":"error","component":"main","error":"service initialization failed: failed to initialize indexer: failed to create ConnPool: failed to connect to `host=quayv360-clair-postgres user=postgres database=postgres`: server error (FATAL: sorry, too many clients already (SQLSTATE 53300))","time":"2021-10-09T06:17:58Z","message":"fatal error"}

oc rsh demo36-quay-database-77bf89c77f-q557j
sh-4.4$ psql
psql (10.17)
Type "help" for help.


postgres=# SHOW max_connections;
 max_connections 
-----------------
 2000
(1 row)

oc rsh demo36-clair-postgres-84b64f46b7-z77hc
sh-4.4$ psql
psql (10.17)
Type "help" for help.


postgres=# SHOW max_connections;
 max_connections 
-----------------
 100
(1 row)