**Build scan:**
https://gradle-enterprise.elastic.co/s/xdilv3b7y5lzq/tests/:server:test/org.elasticsearch.cluster.routing.allocation.RebalanceAfterActiveTests/testRebalanceOnlyAfterAllShardsAreActive

**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.cluster.routing.allocation.RebalanceAfterActiveTests.testRebalanceOnlyAfterAllShardsAreActive" -Dtests.seed=B30A5B87F3CE8FD0 -Dtests.locale=ar-LB -Dtests.timezone=Australia/Brisbane -Druntime.java=17
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.cluster.routing.allocation.RebalanceAfterActiveTests&tests.test=testRebalanceOnlyAfterAllShardsAreActive

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: <5>
     but: was <6>

  at __randomizedtesting.SeedInfo.seed([B30A5B87F3CE8FD0:89B703F4717FB16C]: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.cluster.routing.allocation.RebalanceAfterActiveTests.testRebalanceOnlyAfterAllShardsAreActive(RebalanceAfterActiveTests.java:136)
  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: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:833)

```
server/src/test/java/org/elasticsearch/cluster/routing/allocation/RebalanceAfterActiveTests.java
num++;
                }
            }
            assertTrue(num > 0);
        }
        logger.info("complete relocation, other half of relocation should happen");
        clusterState = startInitializingShardsAndReroute(strategy, clusterState);
        
        assertThat(shardsWithState(clusterState.getRoutingNodes(), STARTED).size(), equalTo(7));
        assertThat(shardsWithState(clusterState.getRoutingNodes(), RELOCATING).size(), equalTo(3));
        for (int i = 0; i < clusterState.routingTable().index("test").size(); i++) {
            final IndexShardRoutingTable shardRoutingTable = clusterState.routingTable().index("test").shard(i);
            for (int j = 0; j < shardRoutingTable.size(); j++) {
                ShardRouting routing = shardRoutingTable.shard(j);
                if (routing.state() == RELOCATING || routing.state() == INITIALIZING) {
                    assertEquals(routing.getExpectedShardSize(), sizes[i]);
                }
            }
        }
        logger.info("complete relocation, that's it!");
        clusterState = startInitializingShardsAndReroute(strategy, clusterState);
        RoutingNodes routingNodes = clusterState.getRoutingNodes();
        assertThat(shardsWithState(clusterState.getRoutingNodes(), STARTED).size(), equalTo(10));
        
        for (RoutingNode routingNode : routingNodes) {
            assertThat(routingNode.size(), equalTo(1));
        }
    }
}