The failure was not easy to detect (for me), but easy to remove ... Elastisearch needs more memory. I setup the Virtual machine with 1536 Mbytes -> if you follow this Guide it needs more :) -> https://www.elastic.co/guide/en/elasticsearch/guide/current/hardware.html
For Installing on Ubuntu 16.04 LTS i found some help here -> https://askubuntu.com/questions/848173/how-to-install-elasticsearch-on-16-04-lts Now the sudo zammad run rake searchindex:rebuild works great and Search in zammad is great!! Thank you! -- Open Source as Download https://zammad.org || Easy to use as SaaS https://zammad.com --- You received this message because you are subscribed to the Google Groups "zammad-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to zammad-users+unsubscr...@googlegroups.com. To post to this group, send email to zammad-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/zammad-users/a35e96df-cac4-4602-929b-8efa1c41c306%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.