I tried to setup SonarQube 8 and 8.1 in my Ubuntu machine running Ubuntu 18.04 (JDK 11). I am facing one specific issue most probably related with ElasticSearch. Whenever I am trying to start the SonarQube with sonar.sh start command it fails with following error in both es.log and sonar.log
ERROR: [1] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
Before posting here I tried multiple things but none of them helped me to solve this issue. The things I have tried are below.
Tried setting values in /etc/security/limits.conf
user - nofile 65535
Tried setting values in /etc/sysctl.conf
vm.max_map_count=262144
fs.file-max=65536
Even after changing these system files I am not able to start SonarQube, I always get same error mentioned above every time.
Please Note:
This only happens when I am trying to use the SonarQube along with external database, it work completely ok with embedded H2 database but whenever I enable any external DB (tried both MSSQL and Postgres) I face the same issue.
After searching around a lot finally I found that in Ubuntu you need to add below line in both /etc/systemd/system.conf and /etc/systemd/user.conf to change default open file limit.
Line to be added
DefaultLimitNOFILE=65536