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Type: Bug
Resolution: Done
Priority: Blocker
Fix Version/s: 39.0.0.Final
Affects Version/s: 40.0.0.Beta1
Component/s: OpenShift
Labels:
None

Git Pull Request:
https://github.com/wildfly/wildfly-cekit-modules/pull/425
[QE] How to address?:
---
[QE] Why QE missed?:
---

I'm using quay.io/wildfly/wildfly-s2i:latest-jdk17 and I see these errors:

Using openshift launcher.
2026-01-29 12:02:12 Launching WildFly Server
INFO Access log is disabled, ignoring configuration.
INFO Configuring JGroups cluster traffic encryption protocol to SYM_ENCRYPT.
INFO Configuring JGroups discovery protocol to dns.DNS_PING
Error applying  CLI script. Embedded server started successfully. The Operations were executed but there were unexpected values. See list of errors in /tmp/cli-script-error-1769688132.cli
[0;31mERROR You have set JGROUPS_CLUSTER_PASSWORD environment variable to configure SYM_ENCRYPT protocol but pbcast.NAKACK2 protocol was not found for TCP stack. Fix your configuration to contain the pbcast.NAKACK2 in the JGroups subsystem for this to happen.[0m
[0;31mERROR You have set JGROUPS_CLUSTER_PASSWORD environment variable to configure SYM_ENCRYPT protocol but pbcast.NAKACK2 protocol was not found for UDP stack. Fix your configuration to contain the pbcast.NAKACK2 in the JGroups subsystem for this to happen.[0m

Same for ASYM_ENCRYPT:

ing openshift launcher.
2026-01-29 12:18:18 Launching WildFly Server
INFO Access log is disabled, ignoring configuration.
INFO Configuring JGroups cluster traffic encryption protocol to ASYM_ENCRYPT.
[0;33mWARN Detected missing JGroups encryption configuration, the communication within the cluster will be encrypted using a deprecated version of ASYM_ENCRYPT protocol. You need to set all of these variables to configure ASYM_ENCRYPT using the Elytron keystore: JGROUPS_ENCRYPT_NAME, JGROUPS_ENCRYPT_PASSWORD, JGROUPS_ENCRYPT_KEYSTORE.[0m
INFO Configuring JGroups discovery protocol to dns.DNS_PING
Error applying  CLI script. Embedded server started successfully. The Operations were executed but there were unexpected values. See list of errors in /tmp/cli-script-error-1769689098.cli
[0;31mERROR You have set JGROUPS_CLUSTER_PASSWORD environment variable to configure ASYM_ENCRYPT protocol but pbcast.NAKACK2 protocol was not found for TCP stack. Fix your configuration to contain the pbcast.NAKACK2 in the JGroups subsystem for this to happen.[0m
[0;31mERROR You have set JGROUPS_CLUSTER_PASSWORD environment variable to configure ASYM_ENCRYPT protocol but pbcast.NAKACK2 protocol was not found for UDP stack. Fix your configuration to contain the pbcast.NAKACK2 in the JGroups subsystem for this to happen.[0m

This is caused by https://github.com/wildfly/wildfly/commit/083285dbb4#diff-8cc79f22c74a67ba3aeb1d02283424cccaec0d33cba9f1533e20040dc591b0a8 where Jgroups were upgraded to version 5.4. This version introduced multiple protocol changes: