[BUG] Flaky test failure - org.opensearch.blocks.SimpleBlocksIT > testAddBlockWhileDeletingIndices

[tlfeng]

Describe the bug
Seen in #2438 (comment)

Gradle run result:
Log 3254
Reports 3254
To Reproduce
I can't reproduce it locally. 🙂
The below shows in the log of Gradle check.

> Task :server:internalClusterTest

REPRODUCE WITH: ./gradlew ':server:internalClusterTest' --tests "org.opensearch.blocks.SimpleBlocksIT.testAddBlockWhileDeletingIndices" -Dtests.seed=EF2BD3D9D42CE8CA -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=ar-LB -Dtests.timezone=Asia/Manila -Druntime.java=17

org.opensearch.blocks.SimpleBlocksIT > testAddBlockWhileDeletingIndices FAILED
    com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught exception in thread: Thread[id=732, name=Thread-16, state=RUNNABLE, group=TGRP-SimpleBlocksIT]

        Caused by:
        java.lang.AssertionError: 
        Expected: an instance of org.opensearch.index.IndexNotFoundException
             but: <ProcessClusterEventTimeoutException[failed to process cluster event (delete-index [[glwvxoqqaa/i2W7ssjoTUeQ4iwAk6ARBQ]]) within 30s]> is a org.opensearch.cluster.metadata.ProcessClusterEventTimeoutException
            at __randomizedtesting.SeedInfo.seed([EF2BD3D9D42CE8CA]:0)
            at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
            at org.junit.Assert.assertThat(Assert.java:964)
            at org.junit.Assert.assertThat(Assert.java:930)
            at org.opensearch.blocks.SimpleBlocksIT.lambda$testAddBlockWhileDeletingIndices$14(SimpleBlocksIT.java:483)
            at org.opensearch.blocks.SimpleBlocksIT.lambda$testAddBlockWhileDeletingIndices$15(SimpleBlocksIT.java:498)

    com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an uncaught exception in thread: Thread[id=734, name=Thread-18, state=RUNNABLE, group=TGRP-SimpleBlocksIT]

        Caused by:
        java.lang.AssertionError: 
        Expected: an instance of org.opensearch.index.IndexNotFoundException
             but: <ProcessClusterEventTimeoutException[failed to process cluster event (delete-index [[pfoumeuzfk/SuaajRD-SWqAsgyGa_h31Q]]) within 30s]> is a org.opensearch.cluster.metadata.ProcessClusterEventTimeoutException
            at __randomizedtesting.SeedInfo.seed([EF2BD3D9D42CE8CA]:0)
            at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
            at org.junit.Assert.assertThat(Assert.java:964)
            at org.junit.Assert.assertThat(Assert.java:930)
            at org.opensearch.blocks.SimpleBlocksIT.lambda$testAddBlockWhileDeletingIndices$14(SimpleBlocksIT.java:483)
            at org.opensearch.blocks.SimpleBlocksIT.lambda$testAddBlockWhileDeletingIndices$15(SimpleBlocksIT.java:498)

Expected behavior
The test passes.

Plugins
none.

Screenshots
none.

Host/Environment (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]

Additional context
Occurred since Mar.10th, 2022.

[ankitkala]

Closing as duplicate of #2472