**Build scan:**
https://gradle-enterprise.elastic.co/s/n2fya3bzklnog/tests/:x-pack:plugin:searchable-snapshots:internalClusterTest/org.elasticsearch.xpack.searchablesnapshots.cache.shared.PartiallyCachedShardAllocationIntegTests/testPartialSearchableSnapshotAllocatedToNodesWithCache

**Reproduction line:**
```
./gradlew ':x-pack:plugin:searchable-snapshots:internalClusterTest' --tests "org.elasticsearch.xpack.searchablesnapshots.cache.shared.PartiallyCachedShardAllocationIntegTests.testPartialSearchableSnapshotAllocatedToNodesWithCache" -Dtests.seed=93FC1C9EB0FD4E2E -Dtests.locale=sr-BA -Dtests.timezone=America/Goose_Bay -Druntime.java=17
```

**Applicable branches:**
8.6

**Reproduces locally?:**
Didn't try

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.searchablesnapshots.cache.shared.PartiallyCachedShardAllocationIntegTests&tests.test=testPartialSearchableSnapshotAllocatedToNodesWithCache

**Failure excerpt:**
```
java.lang.AssertionError: test leaves persistent cluster metadata behind
Expected: an empty collection
     but: <[cluster.routing.rebalance.enable]>

  at __randomizedtesting.SeedInfo.seed([93FC1C9EB0FD4E2E:CC12EB84740C7CD0]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.elasticsearch.test.ESIntegTestCase.afterInternal(ESIntegTestCase.java:569)
  at org.elasticsearch.test.ESIntegTestCase.cleanUpCluster(ESIntegTestCase.java:2237)
  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$10.evaluate(RandomizedRunner.java:1004)
  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:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  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:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:833)

```
x-pack/plugin/searchable-snapshots/src/internalClusterTest/java/org/elasticsearch/xpack/searchablesnapshots/cache/shared/PartiallyCachedShardAllocationIntegTests.java
}
    }
    public void testPartialSearchableSnapshotAllocatedToNodesWithCache() throws Exception {
        final MountSearchableSnapshotRequest req = prepareMountRequest();
        final List<String> newNodeNames = internalCluster().startDataOnlyNodes(
            between(1, 3),
            Settings.builder()
                .put(SHARED_CACHE_SIZE_SETTING.getKey(), ByteSizeValue.ofBytes(randomLongBetween(1, ByteSizeValue.ofMb(10).getBytes())))
                .build()
        );
        final RestoreSnapshotResponse restoreSnapshotResponse = client().execute(MountSearchableSnapshotAction.INSTANCE, req).get();
        assertThat(restoreSnapshotResponse.getRestoreInfo().failedShards(), equalTo(0));
        ensureGreen(req.mountedIndexName());
        final ClusterState state = client().admin().cluster().prepareState().clear().setNodes(true).setRoutingTable(true).get().getState();
        final Set<String> newNodeIds = newNodeNames.stream().map(n -> state.nodes().resolveNode(n).getId()).collect(Collectors.toSet());
        for (ShardRouting shardRouting : state.routingTable().index(req.mountedIndexName()).shardsWithState(ShardRoutingState.STARTED)) {
            assertThat(state.toString(), newNodeIds, hasItem(shardRouting.currentNodeId()));
        }
    }
    public void testOnlyPartialSearchableSnapshotAllocatedToDedicatedFrozenNodes() throws Exception {
        final MountSearchableSnapshotRequest req = prepareMountRequest();
        final List<String> newNodeNames = internalCluster().startNodes(
            between(1, 3),
            Settings.builder()
                .put(SHARED_CACHE_SIZE_SETTING.getKey(), ByteSizeValue.ofBytes(randomLongBetween(1, ByteSizeValue.ofMb(10).getBytes())))
                .put(onlyRole(DiscoveryNodeRole.DATA_FROZEN_NODE_ROLE))
                .build()
        );
        createIndex("other-index", Settings.builder().putNull(TIER_PREFERENCE).build());
        ensureGreen("other-index");