Elasticsearch 7.14 fails to start on Ubuntu 20.04

[theonlycharithperera (Charith)]

When I first installed it using apt-get everything went smoothly and I was able to start it as a service and verified it was working by using curl:

Later I noticed that it was using a lot of memory (2GB), so I stopped the service, and thereafter I haven't been able to restart it. Tried 7.13.4 and 7.13.2 (which is working perfectly on my Ubuntu 20.10 vm).

I changed the log level to 'all' in the log4j config, but can't find anything out of the ordinary. The sun.misc.Unsafe unavailable exception exists even on the installation that works well.

Can anyone help to diagnose this issue? Full log text here:

Elasticsearch failure log

(you don't need a login to view the above link)

Thanks,
Charith

[theonlycharithperera (Charith)]

Bah! Seems like a Ubuntu issue with systemd timing out:

How to prevent systemd service start operation from timing out

[theonlycharithperera (Charith)]

Details here:

Debian elasticsearch.service: start operation timed out. Terminating

I have a development machine that I use to develop production ready web apps. At first Elasticsearch worked very fine on my local development system, when developing the search of my Site. I stopped Elasticsearch because the rest of the work didn't need it. But now am working on a new project that requires Elasticsearch but it's not starting. My main development system is Debian 10 fully updated and patched. But when I issue systemctl start elasticsearch I get this Job for elasticsearch.s…