[CI] XPackRestIT test {p0=snapshot/10_basic/Failed to snapshot indices with synthetic source} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #6637 / debian-12_platform-support-unix
• elasticsearch-pull-request #59043 / part-3
• elasticsearch-periodic-platform-support #6546 / oraclelinux-8_platform-support-unix

Reproduction Line:

./gradlew ":x-pack:plugin:yamlRestTest" --tests "org.elasticsearch.xpack.test.rest.XPackRestIT.test {p0=snapshot/10_basic/Failed to snapshot indices with synthetic source}" -Dtests.seed=1CDFEE1C08EDB90A -Dtests.locale=es-PE -Dtests.timezone=Europe/Ulyanovsk -Druntime.java=23

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [snapshot/10_basic:122]: 
Expected: <0>
     but: was <1>

Issue Reasons:

• [8.x] 3 failures in test test {p0=snapshot/10_basic/Failed to snapshot indices with synthetic source} (0.5% fail rate in 560 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic-platform-support (14.3% fail rate in 14 executions)

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

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 2 failures in test test {p0=snapshot/10_basic/Failed to snapshot indices with synthetic source} (0.3% fail rate in 699 executions)

Build Scans:

• elasticsearch-periodic-platform-support #5867 / rhel-9_platform-support-unix
• elasticsearch-pull-request #50596 / rest-compatibility

[elasticsearchmachine]

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

[elasticsearchmachine]

This has been muted on branch 8.18

Mute Reasons:

• [8.18] 2 failures in test test {p0=snapshot/10_basic/Failed to snapshot indices with synthetic source} (0.2% fail rate in 823 executions)

Build Scans:

• elasticsearch-intake #18424 / part3
• elasticsearch-periodic-platform-support #6355 / ubuntu-2204_platform-support-unix

[elasticsearchmachine]

This has been muted on branch 8.x

Mute Reasons:

• [8.x] 3 failures in test test {p0=snapshot/10_basic/Failed to snapshot indices with synthetic source} (0.5% fail rate in 560 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic-platform-support (14.3% fail rate in 14 executions)

Build Scans:

• elasticsearch-periodic-platform-support #6637 / debian-12_platform-support-unix
• elasticsearch-pull-request #59043 / part-3
• elasticsearch-periodic-platform-support #6546 / oraclelinux-8_platform-support-unix