[keycloak-user] Running two Keycloak instances in parallel

[Knurr, Michael]

Hi all

When trying to upgrade Keycloak to the latest version I ran into problems. Unfortunately It turned out that we ran into different upgrade behaviors on different machines. With the latest version, the upgrade is running locally, on test and on stage. As a last step I now tried to test the upgrade procedure on the production machine with a keycloak instance running on a different port.

When running the upgrade on a server with an already running keycloak instance, the new server runs into a timeout because of concurrency.

10:16:24,926 INFO  [org.keycloak.connections.jpa.updater.liquibase.LiquibaseJpaUpdaterProvider] (ServerService Thread Pool -- 58) Updating database. Using changelog META-INF/jpa-changelog-master.xml
10:21:22,322 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0348: Timeout after [300] seconds waiting for service container stability. Operation will roll back. Step that first updated the service container was 'add' at address '[
    ("core-service" => "management"),
    ("management-interface" => "http-interface")
]'
10:21:23,397 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper) ARJUNA012117: TransactionReaper::check timeout for TX 0:ffff7f000101:73d290d3:5a5dc2e6:d in state  RUN
10:21:23,402 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012121: TransactionReaper::doCancellations worker Thread[Transaction Reaper Worker 0,5,main] successfully canceled TX 0:ffff7f000101:73d290d3:5a5dc2e6:d
10:21:23,668 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper) ARJUNA012117: TransactionReaper::check timeout for TX 0:ffff7f000101:73d290d3:5a5dc2e6:10 in state  RUN
10:21:23,669 WARN  [com.arjuna.ats.arjuna] (Transaction Reaper Worker 0) ARJUNA012121: TransactionReaper::doCancellations worker Thread[Transaction Reaper Worker 0,5,main] successfully canceled TX 0:ffff7f000101:73d290d3:5a5dc2e6:10
10:21:27,328 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0190: Step handler org.jboss.as.server.DeployerChainAddHandler$FinalRuntimeStepHandler at 20b4c4cb for operation add-deployer-chains at address [] failed handling operation rollback -- java.util.concurrent.TimeoutException: java.util.concurrent.TimeoutException
        at org.jboss.as.controller.OperationContextImpl.waitForRemovals(OperationContextImpl.java:522)
...

What might be the reason for this? Shouldn't it possible to run two keycloak servers (with a different port offset) on a single machine? How can I test the keycloak upgrade on the production machine without stopping the running server instance?


Best regards
Michael