2516320 - failed to add comm event because the number of connections are exceeded!

System can't accept any connection and in the service trace you will see following error:

[214916]{-1}[-1/-1] 2017-10-24 01:28:40.159763 e SQLSession cm_tcp.cc(00190) : (part:2) failed to add comm event because the number of connections are exceeded! (#connections=1024, max=1024)
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.159769 e SQLSession tcp_listener.cc(00385) : (SqlListener) failed to add comm event: partition=2
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.176578 e SQLSession cm_tcp.cc(00190) : (part:4) failed to add comm event because the number of connections are exceeded! (#connections=1024, max=1024)
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.176584 e SQLSession tcp_listener.cc(00385) : (SqlListener) failed to add comm event: partition=4
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.262139 e SQLSession cm_tcp.cc(00190) : (part:0) failed to add comm event because the number of connections are exceeded! (#connections=1024, max=1024)
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.262147 e SQLSession tcp_listener.cc(00385) : (SqlListener) failed to add comm event: partition=0
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.266292 e SQLSession cm_tcp.cc(00190) : (part:1) failed to add comm event because the number of connections are exceeded! (#connections=1024, max=1024)
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.266298 e SQLSession tcp_listener.cc(00385) : (SqlListener) failed to add comm event: partition=1
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.283149 e SQLSession cm_tcp.cc(00190) : (part:3) failed to add comm event because the number of connections are exceeded! (#connections=1024, max=1024)
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.283156 e SQLSession tcp_listener.cc(00385) : (SqlListener) failed to add comm event: partition=3
[214916]{-1}[-1/-1] 2017-10-24 01:28:40.318444 e SQLSession cm_tcp.cc(00190) : (part:4) failed to add comm event because the number of connections are exceeded! (#connections=1024, max=1024)

SAP HANA database

KBA , HAN-DB-CLI , SAP HANA Clients (JDBC, ODBC) , HAN-DB , SAP HANA Database , Problem