[CI] TsdbDocValueBwcTests testMixedIndex failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #7398 / openjdk23_entitlements_true_checkpart1_java-matrix
• elasticsearch-periodic #7398 / openjdk21_checkpart1_java-fips-matrix
• elasticsearch-periodic #7398 / openjdk23_entitlements_false_checkpart1_java-matrix

Reproduction Line:

./gradlew ":server:test" --tests "org.elasticsearch.index.codec.tsdb.TsdbDocValueBwcTests.testMixedIndex" -Dtests.seed=3162DABFE3159420 -Dtests.jvm.argline="-Des.entitlements.enabled=true" -Dtests.locale=hu-HU -Dtests.timezone=Africa/Bamako -Druntime.java=23

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.security.AccessControlException: access denied ("java.lang.reflect.ReflectPermission" "suppressAccessChecks")

Issue Reasons:

• [main] 3 consecutive failures in test testMixedIndex
• [main] 3 failures in test testMixedIndex (3.6% fail rate in 84 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-storage-engine (Team:StorageEngine)