[BUG] org.opensearch.search.aggregations.bucket.MinDocCountIT.testStringScriptCountAsc is flaky

[gbbafna]

Describe the bug

The test org.opensearch.search.aggregations.bucket.MinDocCountIT.testStringScriptCountAsc is flaky

Related component

Search:Aggregations

To Reproduce

./gradlew ':server:internalClusterTest' --tests "org.opensearch.search.aggregations.bucket.MinDocCountIT" -Dtests.method="testStringScriptCountAsc {p0={"search.concurrent_segment_search.enabled":"false"}}" -Dtests.seed=43D83E833008E92C -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=ar-JO -Dtests.timezone=Etc/GMT-14 -Druntime.java=21

Expected behavior

The test should always pass.

Additional Details

https://build.ci.opensearch.org/job/gradle-check/40468/testReport/junit/org.opensearch.search.aggregations.bucket/MinDocCountIT/testStringScriptCountAsc__p0___search_concurrent_segment_search_enabled___false___/

[mch2]

org.opensearch.search.aggregations.bucket.MinDocCountIT > testStringScriptCountAsc {p0={"search.concurrent_segment_search.enabled":"false"}} FAILED
    java.lang.AssertionError: Unexpected ShardFailures: [shard [[xVYEYtx_S8GObaess5bqAA][idx][5]], reason [RemoteTransportException[[node_s1][127.0.0.1:46083][indices:data/read/search[phase/query/id]]]; nested: NotSerializableExceptionWrapper[concurrent_modification_exception: null]; ], cause [NotSerializableExceptionWrapper[concurrent_modification_exception: null]
    	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1605)
    	at java.util.HashMap$EntryIterator.next(HashMap.java:1638)
    	at java.util.HashMap$EntryIterator.next(HashMap.java:1636)
    	at java.util.HashMap.putMapEntries(HashMap.java:519)
    	at java.util.HashMap.<init>(HashMap.java:492)
    	at org.opensearch.common.util.concurrent.ThreadContext$ThreadContextStruct.putResponseHeaders(ThreadContext.java:709)
    	at org.opensearch.common.util.concurrent.ThreadContext.lambda$newStoredContext$4(ThreadContext.java:278)
    	at org.opensearch.common.util.concurrent.ThreadContext$StoredContext.restore(ThreadContext.java:568)

Looks unrelated to this specific test and related to this fix that went to main ~5 days ago.

Looking at the jenkins history the commit of the failing run was 8e050761735679eff452857dd0393efc3bb70bb9 which from https://github.com/astute-decipher/OpenSearch/commits/flush_bug/ does not include the commit with the fix.

Closing this for now as resolved.