Connection to partner 'sapserver:sapdp00' broken (NIPING); WSAECONNRESET: Connection reset by peer

Below info is used for troubleshooting intermittent connection issues with in SAP system.

In general, intermittent connection loss occurs with below two reasons

1.      If there is a crash in the dispatcher process of the instance to which the client was connected.

2.      Network Problems (Firewall idle timeout, Black Hole Router, VPN, WAN problems)

For first case, if there is a crash with dispatcher process, This triggers a TCP package with an activated RST flag, which is sent to all connected communication partners and triggers the error message described above in the SAP GUI, among others. All connections will then automatically broken.

For second case, regarding network problems, we need to perform checks with NIPING which tests the performace of packet transmission in TCP layer.

NIPING generally checks the packet transmission in TCP layer of the network where all SAP transactions takes place.

we may not see any packet loss while we ping the servers from terminal and  vice-versa. but if you see errors in NIPING trace, you need to fix it based on the error. Mostly it will be of network issue and some times it may be due to OS.

To check the connectivity using NIPING tool, We need to start NIPING server at SAP level and trigger the NIPING packet transmission from the frontend terminal.

Use below commands

To do this test, it is required to start NIPING as a server in one host:

> niping -s -I 0 -T NIPING_SERVER_TRACE

In the remote host is is required to start NIPING as a client:

> niping -c -H <SAP HOST NAME> -X3 -B 10 -D 30 -T NIPING_CLIENT_TRACE

Also check dispatcher logs of all the application servers.

we need to get below details from the user

• SAP GUI version and patch level
• Windows version and patch level
•  If they had done any upgrades at frontend like windows and sapgui
•  If they are facing issue with any particular transactions or for every transactions
•  If they are facing issue during particular time
•  How are they connected to SAP system, using any VPN or direct client network
•  Are they facing issue with SAP only or with any other applications are also crashing
•  If they are using wired connection or wireless.