Unable to downgrade from SonarQube Developer edition to Community edition

  • SonarQube Developer v9.4 ( I wish to downgrade to SonarQube -9.3 Community edition)
  • Ubuntu 18

I have completed my 14 day trial of SonarQube's Developer edition, and I would like to downgrade to the community edition.
  • I have stopped the Developer instance SonarQube
  • I have started the Community instance of SonarQube

SonarQube’s Community edition is not running, and this is what my web.log file looks like.

2022.04.20 21:31:18 INFO  web[][o.s.p.ProcessEntryPoint] Starting web
2022.04.20 21:31:18 INFO  web[][o.a.t.u.n.NioSelectorPool] Using a shared selector for servlet write/read
2022.04.20 21:31:19 INFO  web[][o.s.s.e.EsClientProvider] Connected to local Elasticsearch: [http://localhost:9001]
2022.04.20 21:31:19 INFO  web[][o.s.s.p.LogServerVersion] SonarQube Server / / 1a276267d04cd4df862d57201082413946b6b3fa
2022.04.20 21:31:19 INFO  web[][o.sonar.db.Database] Create JDBC data source for jdbc:postgresql://localhost/sonarqube
2022.04.20 21:31:20 INFO  web[][o.s.s.p.ServerFileSystemImpl] SonarQube home: /opt/sonarqube/sonarqube-
2022.04.20 21:31:20 INFO  web[][o.s.s.u.SystemPasscodeImpl] System authentication by passcode is disabled
2022.04.20 21:31:20 ERROR web[][o.s.s.p.PlatformImpl] Web server startup failed: Database was upgraded to a more recent version of SonarQube. A backup must probably be restored or the DB settings are incorrect.
2022.04.20 21:31:20 INFO  web[][o.s.s.a.EmbeddedTomcat] HTTP connector enabled on port 9000
2022.04.20 21:31:20 INFO  web[][o.s.p.ProcessEntryPoint] Hard stopping process

this is what my sonar.log file looks like

--> Wrapper Started as Daemon
Launching a JVM...
Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
  Copyright 1999-2006 Tanuki Software, Inc.  All Rights Reserved.

2022.04.20 21:31:06 INFO  app[][o.s.a.AppFileSystem] Cleaning or creating temp directory /opt/sonarqube/sonarqube-
2022.04.20 21:31:06 INFO  app[][o.s.a.es.EsSettings] Elasticsearch listening on [HTTP:, TCP:]
2022.04.20 21:31:06 INFO  app[][o.s.a.ProcessLauncherImpl] Launch process[[key='es', ipcIndex=1, logFilenamePrefix=es]] from [/opt/sonarqube/sonarqube-]: /opt/sonarqube/sonarqube-
2022.04.20 21:31:06 INFO  app[][o.s.a.SchedulerImpl] Waiting for Elasticsearch to be up and running
2022.04.20 21:31:17 INFO  app[][o.s.a.SchedulerImpl] Process[es] is up
2022.04.20 21:31:17 INFO  app[][o.s.a.ProcessLauncherImpl] Launch process[[key='web', ipcIndex=2, logFilenamePrefix=web]] from [/opt/sonarqube/sonarqube-]: /opt/java/jdk-11/bin/java -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djava.io.tmpdir=/opt/sonarqube/sonarqube- -XX:-OmitStackTraceInFastThrow --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED --add-exports=java.base/jdk.internal.ref=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED --add-opens=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.management/sun.management=ALL-UNNAMED --add-opens=jdk.management/com.sun.management.internal=ALL-UNNAMED -Dcom.redhat.fips=false -Xmx512m -Xms128m -XX:+HeapDumpOnOutOfMemoryError -server -Dhttp.nonProxyHosts=localhost|127.*|[::1] -cp ./lib/sonar-application- org.sonar.server.app.WebServer /opt/sonarqube/sonarqube-
2022.04.20 21:31:20 INFO  app[][o.s.a.SchedulerImpl] Process[web] is stopped
2022.04.20 21:31:21 INFO  app[][o.s.a.SchedulerImpl] Process[es] is stopped
2022.04.20 21:31:21 WARN  app[][o.s.a.p.AbstractManagedProcess] Process exited with exit value [es]: 143
2022.04.20 21:31:21 INFO  app[][o.s.a.SchedulerImpl] SonarQube is stopped
<-- Wrapper Stopped

Found this online here

If you do not have a backup, then there is no easy workaround. It might theoretically be possible to manually downgrade the database, but that is a super-risky and hard thing to do.

I do not have a backup of my database,
How can I get my community version up and running again?

Hey there.

You will have to downgrade to v9.4 of Community Edition, rather than v9.3. Edition downgrades are always possible, but you cannot downgrade the version.

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