This weekend it happened again. This time after the server crashed. I had to recreate the HDB both in the client (windows) and external gw (linux centos 7):

Does the 0.0.0.0:30000 means it tries to connect to the server with an IP 0.0.0.0?

May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:02 DoFindCloudServer(D7A99639-8011060F-66CBB529-765798C3-E50ACF6F) got 0.0.0.0:30000, status = Try Again (being launched)
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:02 DoFindCloudServer(D7A99639-8011060F-66CBB529-765798C3-E50ACF6F) attempt 60
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:06 TIMINGS: blocking slow web-call (2) to https://cloudcontroller.hansaworld.net:444/cloudcall took 2.4 seconds
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:06 backtrace called due to: slow webcall
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:06 -------------------- backtrace start -------------------------
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:06 --------------------- backtrace end --------------------------
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:06 DoFindCloudServer(D7A99639-8011060F-66CBB529-765798C3-E50ACF6F) got 0.0.0.0:30000, status = Try Again (being launched)
May 14 09:00:12 485996 StandardERPServer-Slave: 2018-05-14 09:00:06 Serveris:0.0.0.0 Portas:30000
May 14 09:00:12 485996 StandardERPServer-Slave: Nepavyko prisijungti prie serverio. Bandykite jungtis vėliau.

May 14 09:00:12 485996 systemd: Unit hansassgw.service entered failed state.
May 14 09:00:12 485996 systemd: hansassgw.service failed.