**Build scan:**
https://gradle-enterprise.elastic.co/s/ing5bk2dhs36u/tests/:x-pack:plugin:esql:internalClusterTest/org.elasticsearch.xpack.esql.action.EsqlDisruptionIT/testExtractFields


**Reproduction line:**
```
./gradlew ':x-pack:plugin:esql:internalClusterTest' --tests "org.elasticsearch.xpack.esql.action.EsqlDisruptionIT.testExtractFields" -Dtests.seed=70F102B72FD3E64A -Dtests.locale=ga-IE -Dtests.timezone=America/Belem -Druntime.java=21
```

**Applicable branches:**
main

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

**Failure history:**
[Failure dashboard for `org.elasticsearch.xpack.esql.action.EsqlDisruptionIT#testExtractFields`](https://es-delivery-stats.elastic.dev/app/dashboards#/view/dcec9e60-72ac-11ee-8f39-55975ded9e63?_g=(refreshInterval:(pause:!t,value:60000),time:(from:now-7d%2Fd,to:now))&_a=(controlGroupInput:(chainingSystem:HIERARCHICAL,controlStyle:twoLine,ignoreParentSettings:(ignoreFilters:!f,ignoreQuery:!f,ignoreTimerange:!f,ignoreValidations:!t),panels:('0c0c9cb8-ccd2-45c6-9b13-96bac4abc542':(explicitInput:(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,enhancements:(),fieldName:task.keyword,grow:!t,id:'0c0c9cb8-ccd2-45c6-9b13-96bac4abc542',searchTechnique:wildcard,selectedOptions:!(),singleSelect:!t,title:'Gradle%20Task',width:medium),grow:!t,order:0,type:optionsListControl,width:small),'144933da-5c1b-4257-a969-7f43455a7901':(explicitInput:(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,enhancements:(),fieldName:name.keyword,grow:!t,id:'144933da-5c1b-4257-a969-7f43455a7901',searchTechnique:wildcard,selectedOptions:!('testExtractFields'),title:Test,width:medium),grow:!t,order:2,type:optionsListControl,width:medium),'4e6ad9d6-6fdc-4fcc-bf1a-aa6ca79e0850':(explicitInput:(dataViewId:fbbdc689-be23-4b3d-8057-aa402e9ed0c5,enhancements:(),fieldName:className.keyword,grow:!t,id:'4e6ad9d6-6fdc-4fcc-bf1a-aa6ca79e0850',searchTechnique:wildcard,selectedOptions:!('org.elasticsearch.xpack.esql.action.EsqlDisruptionIT'),title:Suite,width:medium),grow:!t,order:1,type:optionsListControl,width:medium)))))


**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: <[Doc[val=0, tag=tag-5], Doc[val=1, tag=tag-1], Doc[val=2, tag=tag-93], Doc[val=3, tag=tag-75], Doc[val=4, tag=tag-12], Doc[val=5, tag=tag-37], Doc[val=6, tag=tag-77], Doc[val=7, tag=tag-14], Doc[val=8, tag=tag-43], Doc[val=9, tag=tag-46]]>
     but: was <[Doc[val=0, tag=tag-5], Doc[val=1, tag=tag-93], Doc[val=2, tag=tag-93], Doc[val=3, tag=tag-75], Doc[val=4, tag=tag-77], Doc[val=5, tag=tag-77], Doc[val=6, tag=tag-14], Doc[val=7, tag=tag-43], Doc[val=8, tag=tag-43], Doc[val=9, tag=tag-46]]>

  at __randomizedtesting.SeedInfo.seed([70F102B72FD3E64A:65383D3174BB6B79]: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.esql.action.EsqlActionIT.testExtractFields(EsqlActionIT.java:840)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
  at java.lang.reflect.Method.invoke(Method.java:580)
  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:48)
  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:1583)

```
server/src/main/java/org/elasticsearch/index/mapper/BlockDocValuesReader.java
private final String fieldName;
        public BytesRefsFromOrdsBlockLoader(String fieldName) {
            this.fieldName = fieldName;
        }
        @Override
        public BytesRefBuilder builder(BlockFactory factory, int expectedCount) {
            return factory.bytesRefs(expectedCount);
        }
        @Override
        public AllReader reader(LeafReaderContext context) throws IOException {
            SortedSetDocValues docValues = context.reader().getSortedSetDocValues(fieldName);
            if (docValues != null) {
                SortedDocValues singleton = DocValues.unwrapSingleton(docValues);
                if (singleton != null) {
                    return new SingletonOrdinals(singleton);
                }
                return new Ordinals(docValues);
            }
            SortedDocValues singleton = context.reader().getSortedDocValues(fieldName);
            if (singleton != null) {
                return new SingletonOrdinals(singleton);
            }
            return new ConstantNullsReader();
        }
        @Override
        public boolean supportsOrdinals() {
            return true;
        }