sonarqube-8.9.6 要求必须是jdk11，不能是jdk8。 ```shell tar -zxf jdk-11.0.9_linux-x64_bin.tar.gz -C /opt/install/ cd /opt/install/jdk-11.0.9 # ./bin/java -version java version "11.0.9" 2020-10-20 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.9+7-LTS) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.9+7-LTS, mixed mode) ```