It's most probably the postgresql-jdbc issue.
Connect to the engine over ssh and downgrade the 'postgresql-jdbc' package.

Best Regards,
Strahil Nikolov

On Sun, May 1, 2022 at 9:39, gantonjo-ovirt--- via Users
<users@ovirt.org> wrote:
Good morning.
I have an hosted engine in my VM cluster that fails to start after upgrading from 4.4.9 to 4.4.10.

Looking at the ovirt-enginge boot.log, I can see the following:

06:19:46,860 ERROR [org.jboss.as.controller.management-operation] WFLYCTL0013: Operation ("add") failed - address: ([("subsystem" => "logging")]): java.lang.IllegalArgumentException: Failed to instantiate class "org.ovirt.engine.core.logger.LoggerHandler" for handler "ovirt-logger"
        at org.jboss.logmanager@2.1.18.Final//org.jboss.logmanager.config.AbstractPropertyConfiguration$ConstructAction.lambda$validate$2(AbstractPropertyConfiguration.java:122)
        at org.jboss.logmanager@2.1.18.Final//org.jboss.logmanager.config.WrappedAction.execute(WrappedAction.java:47)
        at org.jboss.logmanager@2.1.18.Final//org.jboss.logmanager.config.AbstractPropertyConfiguration$ConstructAction.validate(AbstractPropertyConfiguration.java:118)
        at org.jboss.logmanager@2.1.18.Final//org.jboss.logmanager.config.LogContextConfigurationImpl.doPrepare(LogContextConfigurationImpl.java:336)
        at org.jboss.logmanager@2.1.18.Final//org.jboss.logmanager.config.LogContextConfigurationImpl.prepare(LogContextConfigurationImpl.java:289)
        at org.jboss.as.logging@16.0.1.Final//org.jboss.as.logging.logmanager.ConfigurationPersistence.prepare(ConfigurationPersistence.java:299)
        at org.jboss.as.logging@16.0.1.Final//org.jboss.as.logging.LoggingOperations$CommitOperationStepHandler.lambda$execute$0(LoggingOperations.java:131)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:1047)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:779)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:468)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1428)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.ModelControllerImpl.boot(ModelControllerImpl.java:546)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.AbstractControllerService.boot(AbstractControllerService.java:515)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.AbstractControllerService.boot(AbstractControllerService.java:477)
        at org.jboss.as.server@16.0.1.Final//org.jboss.as.server.ServerService.boot(ServerService.java:459)
        at org.jboss.as.server@16.0.1.Final//org.jboss.as.server.ServerService.boot(ServerService.java:412)
        at org.jboss.as.controller@16.0.1.Final//org.jboss.as.controller.AbstractControllerService$1.run(AbstractControllerService.java:416)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
        at org.jboss.logmanager@2.1.18.Final//org.jboss.logmanager.config.AbstractPropertyConfiguration$ConstructAction.lambda$validate$2(AbstractPropertyConfiguration.java:120)
        ... 17 more
Caused by: org.jboss.modules.ModuleLoadError: org.codehaus.jackson.jackson-core-asl
        at org.jboss.modules.Module.addPaths(Module.java:1288)
        at org.jboss.modules.Module.link(Module.java:1644)
        at org.jboss.modules.Module.getPaths(Module.java:1605)
        at org.jboss.modules.Module.getPathsUnchecked(Module.java:1628)
        at org.jboss.modules.Module.loadModuleClass(Module.java:748)
        at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:247)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
        at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
        at java.base/java.lang.ClassLoader.defineClass1(Native Method)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
        at org.jboss.modules.ModuleClassLoader.doDefineOrLoadClass(ModuleClassLoader.java:423)
        at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:555)
        at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:339)
        at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:126)
        at org.jboss.modules.Module.loadModuleClass(Module.java:753)
        at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:247)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)
        at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
        at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
        at org.ovirt.engine.core.logger//org.ovirt.engine.core.logger.LoggerHandler.<init>(LoggerHandler.java:20)
        ... 22 more

Can anyone help me get past this error?

Thanks in advance.
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