[CI] VotingOnlyNodePluginTests testPreferFullMasterOverVotingOnlyNodes failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #9255 / rhel-9_platform-support-unix
• elasticsearch-pull-request #79605 / part-2

Reproduction Line:

./gradlew ":x-pack:plugin:voting-only-node:internalClusterTest" --tests "org.elasticsearch.cluster.coordination.votingonly.VotingOnlyNodePluginTests.testPreferFullMasterOverVotingOnlyNodes" -Dtests.seed=72B12DA125326DD4 -Dtests.locale=mzn-Arab-IR -Dtests.timezone=Etc/GMT-1 -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.NullPointerException: Cannot invoke "org.elasticsearch.cluster.node.DiscoveryNode.getRoles()" because "discoveryNode" is null

Issue Reasons:

• [main] 2 failures in test testPreferFullMasterOverVotingOnlyNodes (0.8% fail rate in 236 executions)

Note:
This issue was created using new test triage automation. Please report issues or feedback to es-delivery.

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 2 failures in test testPreferFullMasterOverVotingOnlyNodes (0.8% fail rate in 236 executions)

Build Scans:

• elasticsearch-periodic-platform-support #9255 / rhel-9_platform-support-unix
• elasticsearch-pull-request #79605 / part-2

[elasticsearchmachine]

Pinging @elastic/es-distributed-coordination (Team:Distributed Coordination)