Невозможно установить Elasticsearch на Ubuntu 18.04

Я получаю эту ошибку при установке эластичного поиска.

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  elasticsearch
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/148 MB of archives.
After this operation, 238 MB of additional disk space will be used.
(Reading database ... 150530 files and directories currently installed.)
Preparing to unpack .../elasticsearch_6.7.2_all.deb ...
could not find java; set JAVA_HOME
dpkg: error processing archive /var/cache/apt/archives/elasticsearch_6.7.2_all.deb (--unpack):
 new elasticsearch package pre-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/elasticsearch_6.7.2_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Я уже установил JAVA_HOME. когда я запускаю echo $JAVA_HOME, он печатает /usr/lib/jvm/jdk1.8.0_211/. Есть идеи, почему я получаю эту ошибку?