3383684 - XSA application not reachable - IcmAcceptClient: server overload

A specific application on top of XSA is not available due to high load. In xscontroller_<x>.log file, following lots of entries can be seen.

[...]
[PlatformRouter]-[warning]-[.]-[.]: [Thr 139626299479936] *** WARNING => IcmAcceptClient: server overload: conn: 1000 - accept delayed [icxxman.c 5589]
[<date & time>]-[Controller.UAA]-[warning]-[controller]-[UAA ping task]: No network connection to UAA at '<name of the application>': Error executing request GET<URL of the application>: java.net.SocketTimeoutException: Read timed out (<...>).
[<date & time>]-[Controller.UAA]-[warning]-[controller]-[UAA ping task]: UAA at '<name of the application>' is still NOT available.
[PlatformRouter]-[warning]-[.]-[.]: [Thr 140127903299456] *** WARNING => IcmAcceptClient: server overload: conn: 1000 - accept delayed [icxxman.c 5589][<date & time>]-
[PlatformRouter]-[warning]-[.]-[.]: [Thr 140127903299456] *** WARNING => IcmAcceptClient: server overload: conn: 1000 - accept delayed [icxxman.c 5589][<date & time>]-
[PlatformRouter]-[warning]-[.]-[.]: [Thr 140127903299456] *** WARNING => IcmAcceptClient: server overload: conn: 1000 - accept delayed [icxxman.c 5589][<date & time>]-
[...]

SAP HANA Extended Application Services, Advanced Model

IcmDynLoadProfile, Cannot change static parameter icm/max_conn (old: 2000, new: 4000), Cannot change static parameter, icm/max_conn, (old: 2000, new: 4000), Cannot, change, static, parameter, icm/max_conn, old:, 2000, new, 4000 , KBA , BC-XS-RT , XS Advanced Runtime / XS Controller , BC-XS-ADM , Admin Tools , Problem