**Build scan:**
https://gradle-enterprise.elastic.co/s/4oci23mdtolv6/tests/:x-pack:plugin:searchable-snapshots:internalClusterTest/org.elasticsearch.xpack.searchablesnapshots.FrozenSearchableSnapshotsIntegTests/testCreateAndRestorePartialSearchableSnapshot

**Reproduction line:**
`./gradlew ':x-pack:plugin:searchable-snapshots:internalClusterTest' --tests "org.elasticsearch.xpack.searchablesnapshots.FrozenSearchableSnapshotsIntegTests.testCreateAndRestorePartialSearchableSnapshot" -Dtests.seed=23B47D63361C03F6 -Dtests.locale=es-VE -Dtests.timezone=Asia/Manila -Druntime.java=17`

**Applicable branches:**
master

**Reproduces locally?:**
No

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.searchablesnapshots.FrozenSearchableSnapshotsIntegTests&tests.test=testCreateAndRestorePartialSearchableSnapshot

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: not <true>
     but: was <true>

  at __randomizedtesting.SeedInfo.seed([23B47D63361C03F6:5733BCB20B7B2D14]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.junit.Assert.assertThat(Assert.java:923)
  at org.elasticsearch.xpack.searchablesnapshots.BaseSearchableSnapshotsIntegTestCase.assertShardFolders(BaseSearchableSnapshotsIntegTestCase.java:248)
  at org.elasticsearch.xpack.searchablesnapshots.FrozenSearchableSnapshotsIntegTests.lambda$testCreateAndRestorePartialSearchableSnapshot$2(FrozenSearchableSnapshotsIntegTests.java:307)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1061)
  at org.elasticsearch.xpack.searchablesnapshots.FrozenSearchableSnapshotsIntegTests.testCreateAndRestorePartialSearchableSnapshot(FrozenSearchableSnapshotsIntegTests.java:307)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:568)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1758)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:44)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:824)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:475)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:831)
  at java.lang.Thread.run(Thread.java:833)

```
x-pack/plugin/searchable-snapshots/src/internalClusterTest/java/org/elasticsearch/xpack/searchablesnapshots/BaseSearchableSnapshotsIntegTestCase.java
indexName,
            restoredIndexSettings,
            Strings.EMPTY_ARRAY,
            true,
            storage
        );
        final RestoreSnapshotResponse restoreResponse = client().execute(MountSearchableSnapshotAction.INSTANCE, mountRequest).actionGet();
        assertThat(restoreResponse.getRestoreInfo().successfulShards(), equalTo(getNumShards(restoredIndexName).numPrimaries));
        assertThat(restoreResponse.getRestoreInfo().failedShards(), equalTo(0));
    }
    protected void createAndPopulateIndex(String indexName, Settings.Builder settings) throws InterruptedException {
        assertAcked(prepareCreate(indexName, settings));
        ensureGreen(indexName);
        populateIndex(indexName, 100);
    }
    protected void populateIndex(String indexName, int maxIndexRequests) throws InterruptedException {
        final List<IndexRequestBuilder> indexRequestBuilders = new ArrayList<>();
        
        final String key = indexName.equals(SearchableSnapshots.SNAPSHOT_BLOB_CACHE_INDEX) ? "type" : "foo";
        for (int i = between(10, maxIndexRequests); i >= 0; i--) {
            indexRequestBuilders.add(client().prepareIndex(indexName).setSource(key, randomBoolean() ? "bar" : "baz"));
        }
        indexRandom(true, true, indexRequestBuilders);
        refresh(indexName);
        if (randomBoolean()) {
            assertThat(
                client().admin().indices().prepareForceMerge(indexName).setOnlyExpungeDeletes(true).setFlush(true).get().getFailedShards(),
                equalTo(0)
            );
        }