Build Scans:

• elasticsearch-periodic-platform-support #6050 / amazonlinux-2_platform-support-aws
• elasticsearch-pull-request #53577 / part-1
• elasticsearch-intake #16638 / part1
• elasticsearch-pull-request #53353 / part-1
• elasticsearch-periodic-platform-support #6045 / debian-12_platform-support-unix
• elasticsearch-pull-request #53009 / part-1

Reproduction Line:

./gradlew ":modules:data-streams:yamlRestTest" --tests "org.elasticsearch.datastreams.DataStreamsClientYamlTestSuiteIT.test {p0=data_stream/140_data_stream_aliases/Create data stream alias}" -Dtests.seed=355CFB28E4FCBB8A -Dtests.locale=sq -Dtests.timezone=NET -Druntime.java=23

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [data_stream/140_data_stream_aliases:63]: got unexpected warning header [
	299 Elasticsearch-8.18.0-666c778765be8ace765c535ec63ca96626496059 "this request accesses system indices: [.security-7], but in a future major version, direct access to system indices will be prevented by default"
]

Issue Reasons:

• [8.x] 6 failures in test test {p0=data_stream/140_data_stream_aliases/Create data stream alias} (2.4% fail rate in 248 executions)
• [8.x] 3 failures in step part-1 (3.4% fail rate in 87 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic-platform-support (50.0% fail rate in 4 executions)
• [8.x] 3 failures in pipeline elasticsearch-pull-request (3.5% fail rate in 85 executions)

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