[CI] Netty4IncrementalRequestHandlingIT testClientConnectionCloseMidStream failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #4875 / sles-12_platform-support-unix
• elasticsearch-periodic-platform-support #4870 / ubuntu-1804_platform-support-unix
• elasticsearch-periodic-platform-support #4870 / amazonlinux-2023_platform-support-aws
• elasticsearch-periodic-platform-support #4865 / windows-2016_checkpart1_platform-support-windows
• elasticsearch-periodic #4890 / concurrent-search-tests
• elasticsearch-periodic #4885 / openjdk17_checkpart1_java-matrix
• elasticsearch-periodic-platform-support #4855 / almalinux-8_platform-support-unix
• elasticsearch-periodic-platform-support #4855 / debian-11_platform-support-unix
• elasticsearch-periodic #4880 / openjdk17_checkpart1_java-matrix
• elasticsearch-periodic-platform-support #4850 / windows-2016_checkpart1_platform-support-windows

Reproduction Line:

./gradlew ":modules:transport-netty4:internalClusterTest" --tests "org.elasticsearch.http.netty4.Netty4IncrementalRequestHandlingIT.testClientConnectionCloseMidStream" -Dtests.seed=29F78821F18F36FF -Dtests.locale=ku-Latn-TR -Dtests.timezone=America/Cayman -Druntime.java=23

Applicable branches: 8.16

Reproduces locally?: N/A

Failure History: See dashboard&_a=(controlGroupState:(initialChildControlState:('0c0c9cb8-ccd2-45c6-9b13-96bac4abc542':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:task.keyword,order:0,selectedOptions:!(),title:'GradleTask',type:optionsListControl),'4e6ad9d6-6fdc-4fcc-bf1a-aa6ca79e0850':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:className.keyword,order:1,selectedOptions:!(org.elasticsearch.http.netty4.Netty4IncrementalRequestHandlingIT),title:'Suite',type:optionsListControl),'144933da-5c1b-4257-a969-7f43455a7901':(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,fieldName:name.keyword,order:2,selectedOptions:!(testClientConnectionCloseMidStream),title:'Test',type:optionsListControl)))))

Failure Message:

io.netty.util.IllegalReferenceCountException: null

Issue Reasons:

• [8.16] 14 failures in test testClientConnectionCloseMidStream (2.8% fail rate in 499 executions)
• [8.16] 4 failures in step windows-2016_checkpart1_platform-support-windows (50.0% fail rate in 8 executions)
• [8.16] 2 failures in step openjdk17_checkpart1_java-matrix (28.6% fail rate in 7 executions)
• [8.16] 7 failures in pipeline elasticsearch-periodic-platform-support (77.8% fail rate in 9 executions)
• [8.16] 3 failures in pipeline elasticsearch-periodic (37.5% fail rate in 8 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-distributed-coordination (Team:Distributed Coordination)

[mhl-b]

Need to be backported to 8.16. Fixied in 8.17 and 9.0 https://github.com/elastic/elasticsearch/pull/116829