Unable to delete keycloak user

While trying to delete keycloak user from admin console page, getting following error stack trace in keycloak logs:

2025-04-15 06:55:24,029 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (executor-thread-85) Uncaught server error: java.lang.NullPointerException
at java.base/java.util.Objects.requireNonNull(Objects.java:233)
at org.keycloak.models.cache.infinispan.events.UserUpdatedEvent.(UserUpdatedEvent.java:44)
at org.keycloak.models.cache.infinispan.events.UserUpdatedEvent.create(UserUpdatedEvent.java:50)
at org.keycloak.models.cache.infinispan.UserCacheSession.registerUserInvalidation(UserCacheSession.java:129)
at org.keycloak.models.cache.infinispan.UserAdapter.getDelegateForUpdate(UserAdapter.java:105)
at org.keycloak.models.cache.infinispan.UserAdapter.invalidate(UserAdapter.java:120)
at org.keycloak.models.cache.infinispan.UserCacheSession.fullyInvalidateUser(UserCacheSession.java:846)
at org.keycloak.models.cache.infinispan.UserCacheSession.removeUser(UserCacheSession.java:860)
at org.keycloak.models.UserManager.removeUser(UserManager.java:36)
at org.keycloak.models.UserManager.removeUser(UserManager.java:32)
at org.keycloak.services.resources.admin.UserResource.deleteUser(UserResource.java:648)
at org.keycloak.services.resources.admin.UserResource$quarkusrestinvoker$deleteUser_1ab1e247046f32b48fb55de7f71f5540f6c8ea14.invoke(Unknown Source)
at org.jboss.resteasy.reactive.server.handlers.InvocationHandler.handle(InvocationHandler.java:29)
at io.quarkus.resteasy.reactive.server.runtime.QuarkusResteasyReactiveRequestContext.invokeHandler(QuarkusResteasyReactiveRequestContext.java:141)
at org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:147)
at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:635)
at org.jboss.threads.EnhancedQueueExecutor$Task.doRunWith(EnhancedQueueExecutor.java:2516)
at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2495)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1521)
at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:11)
at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:11)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:1583)
Please help in resolving this issue.

Hi,
Can you upload the entire file for the log? and share us the Keycloak version, JDK version and some additional information about your installation.
Regards,
Fernando

1 Like