Unable to access sonarqube URL

Hello, Webserver is not running after server restart. While checking logs I found few errors in web.log
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.
And, Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar#deploy]

While checking Sonar.log it shows:
Fail to launch process [es] and,
Could not delete Elasticsearch temporary conf directory
Sonar.Log
I’m using aws rds as db. and sonarqube-developer-9.9.6.92038

Request advise on how to proceed to resolve this. I haven’t upgrade sonarqube or db so far, it just start throwing error after restart.

Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
  Copyright 1999-2006 Tanuki Software, Inc.  All Rights Reserved.

2025.03.03 11:09:43 INFO  app[][o.s.a.AppFileSystem] Cleaning or creating temp directory /var/sonarqube/temp
2025.03.03 11:09:43 INFO  app[][o.s.a.es.EsSettings] Elasticsearch listening on [HTTP: 127.0.0.1:9001, TCP: 127.0.0.1:42559]
2025.03.03 11:09:43 ERROR app[][o.s.a.p.ManagedProcessHandler] Fail to launch process [es]
java.lang.IllegalStateException: Could not delete Elasticsearch temporary conf directory
	at org.sonar.application.ProcessLauncherImpl.pruneElasticsearchConfDirectory(ProcessLauncherImpl.java:168)
	at org.sonar.application.ProcessLauncherImpl.writeConfFiles(ProcessLauncherImpl.java:155)
	at org.sonar.application.ProcessLauncherImpl.launch(ProcessLauncherImpl.java:92)
	at org.sonar.application.SchedulerImpl.lambda$tryToStartProcess$2(SchedulerImpl.java:196)
	at org.sonar.application.process.ManagedProcessHandler.start(ManagedProcessHandler.java:73)
	at org.sonar.application.SchedulerImpl.tryToStartProcess(SchedulerImpl.java:194)
	at org.sonar.application.SchedulerImpl.tryToStartEs(SchedulerImpl.java:146)
	at org.sonar.application.SchedulerImpl.tryToStartAll(SchedulerImpl.java:138)
	at org.sonar.application.SchedulerImpl.schedule(SchedulerImpl.java:112)
	at org.sonar.application.App.start(App.java:59)
	at org.sonar.application.App.main(App.java:81)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:240)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.nio.file.AccessDeniedException: /var/sonarqube/temp/conf/es
	at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
	at java.base/sun.nio.fs.UnixFileSystemProvider.implDelete(UnixFileSystemProvider.java:248)
	at java.base/sun.nio.fs.AbstractFileSystemProvider.deleteIfExists(AbstractFileSystemProvider.java:110)
	at java.base/java.nio.file.Files.deleteIfExists(Files.java:1191)
	at org.sonar.application.ProcessLauncherImpl.pruneElasticsearchConfDirectory(ProcessLauncherImpl.java:166)
	... 16 common frames omitted
2025.03.03 11:09:43 INFO  app[][o.s.a.SchedulerImpl] Process[es] is stopped
2025.03.03 11:09:43 INFO  app[][o.s.a.SchedulerImpl] SonarQube is stopped

web.log


2025.02.28 11:00:02 INFO  web[][o.s.s.a.EmbeddedTomcat] HTTP connector enabled on port 9000
2025.02.28 11:00:02 INFO  web[][o.s.p.ProcessEntryPoint] Hard stopping process
2025.02.28 11:00:02 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar#deploy]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1443)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1432)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
2025.02.28 11:00:13 INFO  web[][o.s.p.ProcessEntryPoint] Starting web
2025.02.28 11:00:13 INFO  web[][o.a.t.u.n.NioSelectorPool] Using a shared selector for servlet write/read
2025.02.28 11:00:14 INFO  web[][o.s.c.e.CoreExtensionsLoader] Loaded core extensions: developer-edition, developer-scanner, developer-server, license
2025.02.28 11:00:14 INFO  web[][o.s.s.e.EsClientProvider] Connected to local Elasticsearch: [http://localhost:9001]
2025.02.28 11:00:14 INFO  web[][o.s.s.p.LogServerVersion] SonarQube Server / 9.2.4.50792 / 78f7113cee15b2bd37a958455271e68f1244cb7b
2025.02.28 11:00:14 INFO  web[][o.sonar.db.Database] Create JDBC data source for jdbc:postgresql://sonarqube-db-1.qwertyu.us-east-1.rds.amazonaws.com:5432/asddf
2025.02.28 11:00:15 INFO  web[][o.s.s.p.ServerFileSystemImpl] SonarQube home: /opt/sonarqube
2025.02.28 11:00:15 INFO  web[][o.s.s.u.SystemPasscodeImpl] System authentication by passcode is disabled
2025.02.28 11:00:15 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.
2025.02.28 11:00:15 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')

Hi,

Welcome to the community!

This looks like a permissions error.

Regarding your web.log, can you share the full thing from startup? I don’t recognize this, and would like to see the full context:

From what I can tell, it looks like you downgraded SonarQube?

 
Ann

Thanks Ann!! for taking a look over it.

Apologies i couldn’t revert back earlier.

I haven’t downgraded sonrqube, it’s just i restart the server and start getting this issue.

Thanks Again!! Apreciate your help.

Please find web.log below:

2025.02.28 10:51:08 INFO  web[][o.s.p.ProcessEntryPoint] Starting web
2025.02.28 10:51:08 INFO  web[][o.a.t.u.n.NioSelectorPool] Using a shared selector for servlet write/read
2025.02.28 10:51:09 INFO  web[][o.s.c.e.CoreExtensionsLoader] Loaded core extensions: developer-edition, developer-scanner, developer-server, license
2025.02.28 10:51:09 INFO  web[][o.s.s.e.EsClientProvider] Connected to local Elasticsearch: [http://localhost:9001]
2025.02.28 10:51:09 INFO  web[][o.s.s.p.LogServerVersion] SonarQube Server / 9.2.4.50792 / 78f7113cee15b2bd37a958455271e68f1244cb7b
2025.02.28 10:51:09 INFO  web[][o.sonar.db.Database] Create JDBC data source for jdbc:postgresql://sonarqube-database-1.adcfffdfdss.sa-east-1.rds.amazonaws.com:5432/sonarqube
2025.02.28 10:51:10 INFO  web[][o.s.s.p.ServerFileSystemImpl] SonarQube home: /opt/sonarqube
2025.02.28 10:51:10 INFO  web[][o.s.s.u.SystemPasscodeImpl] System authentication by passcode is disabled
2025.02.28 10:51:10 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.
2025.02.28 10:51:10 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:187)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
2025.02.28 10:51:10 INFO  web[][o.s.s.a.EmbeddedTomcat] HTTP connector enabled on port 9000
2025.02.28 10:51:10 INFO  web[][o.s.p.ProcessEntryPoint] Hard stopping process
2025.02.28 10:51:10 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar#deploy]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1443)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1432)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
2025.02.28 10:51:21 INFO  web[][o.s.p.ProcessEntryPoint] Starting web
2025.02.28 10:51:21 INFO  web[][o.a.t.u.n.NioSelectorPool] Using a shared selector for servlet write/read
2025.02.28 10:51:22 INFO  web[][o.s.c.e.CoreExtensionsLoader] Loaded core extensions: developer-edition, developer-scanner, developer-server, license
2025.02.28 10:51:22 INFO  web[][o.s.s.e.EsClientProvider] Connected to local Elasticsearch: [http://localhost:9001]
2025.02.28 10:51:22 INFO  web[][o.s.s.p.LogServerVersion] SonarQube Server / 9.2.4.50792 / 78f7113cee15b2bd37a958455271e68f1244cb7b
2025.02.28 10:51:22 INFO  web[][o.sonar.db.Database] Create JDBC data source for jdbc:postgresql://sonarqube-database-1.adcfffdfdss.sa-east-1.rds.amazonaws.com:5432/sonarqube
2025.02.28 10:51:23 INFO  web[][o.s.s.p.ServerFileSystemImpl] SonarQube home: /opt/sonarqube
2025.02.28 10:51:23 INFO  web[][o.s.s.u.SystemPasscodeImpl] System authentication by passcode is disabled
2025.02.28 10:51:23 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.
2025.02.28 10:51:23 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:187)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
2025.02.28 10:51:23 INFO  web[][o.s.s.a.EmbeddedTomcat] HTTP connector enabled on port 9000
2025.02.28 10:51:23 INFO  web[][o.s.p.ProcessEntryPoint] Hard stopping process
2025.02.28 10:51:23 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar#deploy]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1443)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1432)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
2025.02.28 10:51:34 INFO  web[][o.s.p.ProcessEntryPoint] Starting web
2025.02.28 10:51:34 INFO  web[][o.a.t.u.n.NioSelectorPool] Using a shared selector for servlet write/read
2025.02.28 10:51:34 INFO  web[][o.s.c.e.CoreExtensionsLoader] Loaded core extensions: developer-edition, developer-scanner, developer-server, license
2025.02.28 10:51:34 INFO  web[][o.s.s.e.EsClientProvider] Connected to local Elasticsearch: [http://localhost:9001]
2025.02.28 10:51:35 INFO  web[][o.s.s.p.LogServerVersion] SonarQube Server / 9.2.4.50792 / 78f7113cee15b2bd37a958455271e68f1244cb7b
2025.02.28 10:51:35 INFO  web[][o.sonar.db.Database] Create JDBC data source for jdbc:postgresql://sonarqube-database-1.adcfffdfdss.sa-east-1.rds.amazonaws.com:5432/sonarqube
2025.02.28 10:51:36 INFO  web[][o.s.s.p.ServerFileSystemImpl] SonarQube home: /opt/sonarqube
2025.02.28 10:51:36 INFO  web[][o.s.s.u.SystemPasscodeImpl] System authentication by passcode is disabled
2025.02.28 10:51:36 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.
2025.02.28 10:51:36 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:187)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1427)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1417)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
2025.02.28 10:51:36 INFO  web[][o.s.s.a.EmbeddedTomcat] HTTP connector enabled on port 9000
2025.02.28 10:51:36 INFO  web[][o.s.p.ProcessEntryPoint] Hard stopping process
2025.02.28 10:51:36 WARN  web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar#deploy]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
	at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
	at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
	at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
	at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1443)
	at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1432)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)

Hi,

The error is pretty clear:

At some point, you ran the database upgrade for a newer version of SonarQube, and then you tried to use an older version with that database. That simply won’t work. You need to either restore your DB backup (as it says in the error), or just adopt the latest SonarQube version.

 
Ann