How to troubleshoot sapcontrol error FAIL: NIECONN_REFUSED (Connection refused)?

	

hatadm@linue7:/usr/sap/HAT/HDB07> sapcontrol -nr 07  -function GetProcessList

11.12.2020 10:14:49
GetProcessList
FAIL: NIECONN_REFUSED (Connection refused), NiRawConnect failed in plugin_fopen()

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# --------------------------- solutions --------------------------
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# -- check whether the "sapstartsrv" service is running or not
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ps -ef | grep sapstartsrv  


# -- if it is running execute the following command
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# --- Solution 1 --
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hatadm@linux7:/usr/sap/HAT/HDB07> sapstartsrv -D pf=/usr/sap/HAT/SYS/profile/HAT_HDB07_linux7

# -- Check sap control is now working
# 

hatadm@linux7:/usr/sap/HAT/HDB07> sapcontrol -nr 07  -function GetProcessList

23.12.2020 11:03:09
GetProcessList
OK
name, description, dispstatus, textstatus, starttime, elapsedtime, pid
hdbdaemon, HDB Daemon, GREEN, Running, 2020 07 10 13:19:31, 3694:43:38, 70739
hdbcompileserver, HDB Compileserver, GREEN, Running, 2020 07 10 13:19:41, 3694:43:28, 71070
hdbindexserver, HDB Indexserver-OPENHR, GREEN, Running, 2020 12 02 18:19:59, 208:43:10, 89178
hdbnameserver, HDB Nameserver, GREEN, Running, 2020 07 10 13:19:31, 3694:43:38, 70768
hdbpreprocessor, HDB Preprocessor, GREEN, Running, 2020 07 10 13:19:41, 3694:43:28, 71072
hdbwebdispatcher, HDB Web Dispatcher, GREEN, Running, 2020 07 10 13:19:55, 3694:43:14, 71844
hdbindexserver, HDB Indexserver-OPENSRCBDD, GREEN, Running, 2020 12 02 18:20:17, 208:42:52, 91465
hdbindexserver, HDB Indexserver-OPENBW, GREEN, Running, 2020 12 02 18:20:28, 208:42:41, 91968
hdbscriptserver, HDB Scriptserver-DEVBW, GREEN, Running, 2020 10 07 09:16:54, 1562:46:15, 135273



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# --- Solution 2 -- 
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# sapcontrol to start the sap system to be executed with the host option: -host
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# sapcontrol -nr  -host :513 -function 
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hatadm@linux7:/usr/sap/HAT/HDB07> sapcontrol -nr 07  -host linux7:50713  -function Start