A Technical I.T./DevOps Blog
Problem scenario
You try to run SonarScanner or do something with SonarQube. You get a “500 Error” or some related internal server error. What should you do?
Solution
Reinstall Java. It is a dependency for SonarQube. You can keep SonarQube installed and just stop the services while you uninstall and reinstall Java. After you remove Java (and do research if you don’t know how), you can use this
…
Continue reading “How Do You Troubleshoot a “500 Error” with SonarQube?”
Problem scenario
You run “sudo systemctl start sonar”, but you get this message: “Failed to start sonar.service: Unit not found”
What should you do?
Solution
Run this: sudo systemctl enable sonar
Now you should be able to run your command to start the “sonar” service.
…
Continue reading “How Do You Troubleshoot “Failed to start sonar.service: Unit not found” Error?”
Problem scenario
SonarQube is listening on the loopback IP address on port 9000. SonarQube is not listening on the external IP address. You want to access the web UI for SonarQube. What should you do?
Solution
Install a web server and configure it to connect to port 9000. Here are the details for using Apache web server on a Red Hat derivative (e.g., CentOS/RHEL/Fedora).
1.
…
Problem scenario
In the SonarQube logs you get an error “java.lang.IllegalStateException: Can not connect to database. Please check connectivity and settings (see the properties prefixed by ‘sonar.jdbc’)”
How do you troubleshoot this error?
Solution
1. Verify you can ping the hostname.
2. Test the port with nmap (e.g., “nmap -p 1521 <databaseFQDN>” where <databaseFQDN> is the hostname of the database and 1521 is the port you configured in the stanza with “sonar.jdbc”).
…
Problem scenario
You try to start the SonarQube service. It does not turn on or stay on. You go to the logs directory in the “sonar” subdirectory on the Linux server. Every time you run “sudo systemctl start sonar”, there are no corresponding log entries. You may find no logs at all. What should you do to troubleshoot SonarQube to start when the logs are not helping you?
Solution
1.
…
Continue reading “What Do You Do If SonarQube Has No Logs and the Service Will Not Start?”
Problem scenario
You are running SonarQube. The service seems to start (based on the output of “sudo systemctl status sonar”). But based on an nmap command on your server’s external IP address, you see no service is listening. You go to the logs directory and cannot find the ce.log file. You cannot reach the web UI for SonarQube. How do you fix this problem?
Possible Solution #1
Look at your sonar.properties file.
…
Problem scenario
You start SonarQube and the service seems to come up. You see TCP port connection activity. It does not stay up long enough to log in.
You have SonarQube installed on a Linux server. SonarQube starts, but it does not remain running because it dies out. It stops running after 30 seconds of being started.
In /opt/sonarqube/es.log you see a message like this:
…
Problem scenario
You run a “sudo ps -ef | grep sonar” and find Sonar to be running. You run “sudo sytemctl status sonar” and find that it is active. You run nmap or netstat and see port activity from the sonar service. Sonar is listening. When you go to a web browser over the right port (e.g., http://x.x.x.x:9000/) you do not see any web page. There is no evidence you can connect.
…
Continue reading “How Do You Browse SonarQube and Interact with It as a Web UI from the Front-End?”
Problem scenario
You are using SonarQube Community Edition. SonarQube will not start. You recently moved a .jar file into a plugins directory. You want to use this plugin to analyze code.
The SonarQube logs may register something like “Background initialization failed. Stopping SonarQube java.lang.IllegalStateException: Fail to load plugin C / C++ / Objective-C [cpp]”
The logs may also say something like this: “Unable to register extension com.A.A.A.B.F from plugin ‘cpp’ or “NoClassFoundError…PropertiesDao”.
…
Problem scenario
You run sonar-scanner from the command line. You receive an error such as this: “Error during SonarQube Scanner execution … java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.scan.ProjectLock at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java.64”
What should you do?
Possible solution #1
Is the sonar-project.properties file in the directory from which you ran sonar-scanner? This command expects this file to be in that directory.
…