[CI] TextFieldBlockLoaderTests testBlockLoader {preference=Params[syntheticSource=true, preference=NONE]} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #8140 / opensuse-leap-15_platform-support-unix
• elasticsearch-periodic-platform-support #8055 / rocky-8_platform-support-unix

Reproduction Line:

./gradlew ":server:test" --tests "org.elasticsearch.index.mapper.blockloader.TextFieldBlockLoaderTests.testBlockLoader {preference=Params[syntheticSource=true, preference=DOC_VALUES]}" -Dtests.seed=43AF75E52308A59A -Dtests.locale=en-UG -Dtests.timezone=Africa/Dar_es_Salaam -Druntime.java=24

Applicable branches:
8.19

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: expected:<[[45 47 53 45 73 78 52 70 49 73 66 75 5a 6c 68 42 4d 49 50 70 4a 42 7a 45 73], [47 5a 43 7a 64], [48 6b 77 70 6b 67], [55 67 6e 47 4c 6a 64 76 52 57 66 45 65 66 6e 4b 59 5a 51 66 47 4b 41 41 46 64 4c], [61 63 73 75 52 77 67 63 61 74 78 76 69 47 4f 43 59 71]]> but was:<[[55 67 6e 47 4c 6a 64 76 52 57 66 45 65 66 6e 4b 59 5a 51 66 47 4b 41 41 46 64 4c], [48 6b 77 70 6b 67], [47 5a 43 7a 64], [45 47 53 45 73 78 52 70 49 73 66 75 5a 6c 68 42 4d 49 50 70 4a 42 7a 45 73], [61 63 73 75 52 77 67 63 61 74 78 76 69 47 4f 43 59 71]]>

Issue Reasons:

• [8.19] 2 failures in test testBlockLoader {preference=Params[syntheticSource=true, preference=NONE]} (0.3% fail rate in 634 executions)
• [8.19] 2 failures in pipeline elasticsearch-periodic-platform-support (13.3% fail rate in 15 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)