Can't start Elasticsearch on Ubuntu 19.10

Hi @dandago

See here:

Exception in thread "main" java.lang.RuntimeException: starting java failed with [137]

Error 137 means that the system failed to allocate enough memory for the Java process.
The default jvm.options provided by us will require at least 1GB of free memory available for the Elasticsearch process to run. In practice you will probably need a little more than that.