[CI] UpgradeClusterClientYamlTestSuiteIT class failing

Author: elasticsearchmachineCreated May 13, 2026Updated Sep 29, 2026

Labels:Distributed/Snapshot/Restore>test-failureTeam:Distributedmedium-risk

Build Scans:

Reproduction Line:

./gradlew ":x-pack:qa:rolling-upgrade:v8.19.16#twoThirdsUpgradedTest" -Dtests.class="org.elasticsearch.upgrades.UpgradeClusterClientYamlTestSuiteIT" -Dtests.method="test {p0=mixed_cluster/80_transform_jobs_crud/Test GET, start, and stop old cluster batch transforms}" -Dtests.seed=37953A03B8E71ADF -Dtests.bwc=true -Dtests.locale=ca-ES-VALENCIA -Dtests.timezone=Africa/Juba -Druntime.java=26

Applicable branches: main

Reproduces locally?: N/A

Failure History: See dashboard

Failure Message:

java.lang.AssertionError: Failure in test setup: Failed to initialize at least 3 watcher nodes

Issue Reasons:

[main] 9 failures in class org.elasticsearch.upgrades.UpgradeClusterClientYamlTestSuiteIT (0.9% fail rate in 1000 executions)
[main] 2 failures in step 8.19.16_bwc-snapshots (16.7% fail rate in 12 executions)
[main] 7 failures in step 8.19.16_part_2_bwc-snapshots (28.0% fail rate in 25 executions)
[main] 5 failures in pipeline elasticsearch-pull-request (15.2% fail rate in 33 executions)
[main] 2 failures in pipeline elasticsearch-intake (15.4% fail rate in 13 executions)

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

Source: elastic/elasticsearch

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