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Version: 8.1

Common problems

Problem: Identity is unable to connect to Keycloak​

If you are seeing an error message such as this in your Identity service logs there is an issue with the connection Identity is trying to make and the Keycloak service:

2022-07-04 15:52:04.250 ERROR 1 --- [main] i.c.i.i.k.config.KeycloakConfiguration   : Failure #1. Unable to connect to Keycloak.

This can be caused by:

  1. The Keycloak service has not started/is not ready
  2. Identity making requests from an external IP address

Solution 1: The Keycloak service has not started/is not ready​

The Keycloak service can take time to start due to the supporting systems.

Keycloak is ready to accept connections when the following log lines are visible:

15:24:24,094 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0025: Keycloak 16.1.1 (WildFly Core 18.0.4.Final) started in 33171ms - Started 718 of 1020 services (699 services are lazy, passive or on-demand)
15:24:24,098 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0060: Http management interface listening on http://127.0.0.1:9990/management
15:24:24,100 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0051: Admin console listening on http://127.0.0.1:9990

When the Keycloak service is ready for connections, please start (or restart) the Identity pod.

Solution 2: Identity making requests from an external IP address​

By default, Keycloak requires TLS on requests that originate from what it considers to be an external source. The Keycloak documentation for setting up SSL maintains a list of what they consider to be an external IP address under the external requests section.

The solution to this issue will depend largely on your environment, however as a starting point we would suggest you consider these options:

  1. Configure the communication between the services (for example in a cluster) to use IP ranges that fall within the ranges that Keycloak expects.
  2. If configuring the IP ranges is not an option then it is possible to disable the SSL requirement in Keycloak itself. to achieve this:
    1. In the master realm set Require SSL to none by following the steps in SSL modes
    2. Restart the Identity service
    3. In the camunda-platform realm set Require SSL to none by following the steps in SSL modes
    4. Restart the Identity service again
    5. Identity should now start successfully
danger

We would only recommend that requirements for SSL are disabled in a development environment.

Problem: There is an issue in Keycloak where Identity crashloops​

There currently exists a known issue in Keycloak where Identity experiences a crashloop. You may see something similar to the following:

2023-12-08 04:35:17,142 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (executor-thread-39) Uncaught server error: java.lang.IllegalStateException: Duplicate key openid-connect%Client ID (attempted merging values org.keycloak.models.ProtocolMapperModel@aa0f0e69 and org.keycloak.models.ProtocolMapperModel@9d856c11)
    at java.base/java.util.stream.Collectors.duplicateKeyException(Collectors.java:135)
    at java.base/java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$1(Collectors.java:182)
    at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
    at java.base/java.util.stream.DistinctOps$1$2.accept(DistinctOps.java:174)

Solution​

As a workaround, take the following steps for all Camunda clients:

  1. Log in to Keycloak as an administrator.
  2. Go to the camunda-platform realm.
  3. Click Clients > Zeebe.
  4. Click Client Scopes > zeebe-dedicated.
  5. You will likely see duplicates of Client ID, Client IP Address, and Client Host. Delete these until there is only one of each remaining.
  6. Restart your Identity pod to ensure connection.