[CI] AsyncSearchActionIT testDeleteCancelRunningTask failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #7721 / debian-12_platform-support-unix
• elasticsearch-periodic #7699 / openjdk24_entitlements_true_checkpart2_java-matrix
• elasticsearch-pull-request #68377 / part-2

Reproduction Line:

./gradlew ":x-pack:plugin:async-search:internalClusterTest" --tests "org.elasticsearch.xpack.search.AsyncSearchActionIT.testDeleteCancelRunningTask" -Dtests.seed=7071A1951C488948 -Dtests.locale=pcm -Dtests.timezone=Etc/GMT-10 -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: an empty collection
     but: <[LEAK: ByteBuf.release() was not called before it's garbage-collected. See https://netty.io/wiki/reference-counted-objects.html for more information.
Recent access records: 
#1:
	org.elasticsearch.transport.netty4.WrappedByteBuf.release(WrappedByteBuf.java:1028)
	org.elasticsearch.transport.netty4.TrashingByteBuf.release(TrashingByteBuf.java:37)
	org.elasticsearch.transport.netty4.Netty4Utils$ByteBufRefCounted.decRef(Netty4Utils.java:172)
	org.elasticsearch.common.bytes.ReleasableBytesReference.close(ReleasableBytesReference.java:98)
	org.elasticsearch.transport.InboundPipeline.releasePendingBytes(InboundPipeline.java:145)
	org.elasticsearch.transport.InboundPipeline.doHandleBytes(InboundPipeline.java:97)
	org.elasticsearch.transport.InboundPipeline.handleBytes(InboundPipeline.java:69)
	org.elasticsearch.transport.netty4.Netty4MessageInboundHandler.channelRead(Netty4MessageInboundHandler.java:54)
	io.netty.channel.Abst
[truncated]

Issue Reasons:

• [main] 3 failures in test testDeleteCancelRunningTask (1.6% fail rate in 182 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 testDeleteCancelRunningTask (1.1% fail rate in 177 executions)

Build Scans:

• elasticsearch-periodic #7699 / openjdk24_entitlements_true_checkpart2_java-matrix
• elasticsearch-pull-request #68377 / part-2

[elasticsearchmachine]

Pinging @elastic/es-search (Team:Search)

[elasticsearchmachine]

Pinging @elastic/es-search-foundations (Team:Search Foundations)