[CI] MixedClusterClientYamlTestSuiteIT class failing

Author: elasticsearchmachineCreated Sep 17, 2026Updated Sep 17, 2026

Labels>test-failure:Search Relevance/Vectorsmedium-risk

Build Scans:

Reproduction Line:

./gradlew ":qa:mixed-cluster:v9.5.5#yamlRestTest" -Dtests.class="org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT" -Dtests.method="test {p0=indices.put_index_template/10_basic/Add data stream lifecycle with downsampling}" -Dtests.seed=D453B87B2D5EB2CB -Dtests.bwc=true -Dtests.locale=ln-AO -Dtests.timezone=America/Louisville -Druntime.java=21 -Dtests.fips.enabled=true

Applicable branches: main

Reproduces locally?: N/A

Failure History: See dashboard

Failure Message:

java.io.UncheckedIOException: java.net.ConnectException: Connection refused

Issue Reasons:

[main] 1 consecutive failures in class org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT
[main] 1 consecutive failures in step openjdk21_9.5.5_java-fips-140-3-matrix-bwc
[main] 1 consecutive failures in step openjdk21_9.4.8_java-matrix-bwc
[main] 4 consecutive failures in step 9.4.7_part_6_bwc-snapshots
[main] 2 consecutive failures in step 9.4.6_part_6_bwc-snapshots
[main] 2 consecutive failures in step 9.4.7_bwc
[main] 2 consecutive failures in step openjdk21_9.4.7_java-fips-140-3-matrix-bwc
[main] 2 consecutive failures in step openjdk21_9.4.7_java-fips-matrix-bwc
[main] 1 consecutive failures in step openjdk25_9.5.5_java-matrix-bwc
[main] 1 consecutive failures in step openjdk21_9.4.7_java-matrix-bwc
[main] 1 consecutive failures in step openjdk25_9.4.7_java-matrix-bwc
[main] 1 consecutive failures in pipeline elasticsearch-periodic
[main] 65 failures in class org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT (6.7% fail rate in 966 executions)
[main] 8 failures in step 9.4.8_part_6_bwc-snapshots (4.3% fail rate in 186 executions)
[main] 9 failures in step 9.5.5_part_6_bwc-snapshots (4.6% fail rate in 197 executions)

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

Source: elastic/elasticsearch

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