2415511 - UnknownHostException when executing sapinst / SWPM

Starting the sapinst executable of the Software Provisioning Manager (SWPM) results in an error and the GUI is not shown.
Instead a text similar to this is displayed:

root@<host> 70SWPM10SP18_4-20009701]# ./sapinst
[==============================] / extracting... done!

SAPinst build information:
--------------------------
Version: 720.0.35
Build: 1707962
Compile time: Oct 05 2016 - 16:03:57
Make type: optu
Codeline: 720-2_REL
Platform: linuxx86_64
Kernel build: 721, patch 711, changelist 1683340
SAP JRE build: SAP Java Server VM (build 6.1.093 25.51-b02, Jul 26 2016 13:52:31 - 61_REL - optU - linux amd64 - 6 - bas2:273649 (mixed mode))
SAP JCo build: 3.0.15
Exe directory: /tmp/sapinst_exe.33579.1484395150

Starting GUIServer using:
SAPinst port : 21212
GUI autostart : on
GUI mode : normal
command : /tmp/sapinst_exe.33579.1484395150/jre/bin/java -Xmx512M -Dsap.env.var.javahome=SAPINST_JRE_HOME -cp "/tmp/sapinst_exe.33579.1484395150/instgui.jar" SDTServer "rootdir=/root/.sdtgui" config=jar:sdtserver.xml guiport=21212 -nolock -srvarg=/SAPinstService/host=127.0.0.1 -srvarg=/SAPinstService/port=pipe:6:9

guiengine: 2017-01-14 13:59:16 Waiting for client connection (1)
load resource pool /mnt/70SWPM10SP18_4-20009701/resourcepool.xml
Jan 14, 2017 1:59:17 PM [Info]: *************************
Jan 14, 2017 1:59:17 PM [Info]: Starting Server
Jan 14, 2017 1:59:17 PM [Error]: java.net.UnknownHostException: host: <host>
Jan 14, 2017 1:59:17 PM [Error]: java.net.UnknownHostException: host: <host>
Jan 14, 2017 1:59:17 PM [Error]: Error during configuration - see preceding messages.
Jan 14, 2017 1:59:17 PM [Fatal]: Error during controller startup.
Jan 14, 2017 1:59:17 PM [Fatal]: SL Controller exiting.

guiengine: No GUI server connected; waiting for a connection on host host, port 21212 to continue with the installation

Note that the term <host> represents your host name and is just an example in this case.

• Linux Operating system / Windows
• Software Provisioning Manager (SWPM), all versions

SWPM, sapinst, GUI, UnknownHostException, host: <host> , KBA , BC-INS-FWK , sapinst, slcb, elmbridge, elm replication service , Problem