Some more earlier failures with the same issue (all in Windows builds):
https://gradle-enterprise.elastic.co/s/ic3vf76vlpiho
https://gradle-enterprise.elastic.co/s/7nsuvadgg5bbm
https://gradle-enterprise.elastic.co/s/7kcrezoswrgdg

**Build scan:**
https://gradle-enterprise.elastic.co/s/whgmtqrtovpgu/tests/:server:internalClusterTest/org.elasticsearch.reservedstate.service.FileSettingsServiceIT/testErrorSaved

**Reproduction line:**
`gradlew ':server:internalClusterTest' --tests "org.elasticsearch.reservedstate.service.FileSettingsServiceIT.testErrorSaved" -Dtests.seed=762F971779043BEB -Dtests.locale=es-BO -Dtests.timezone=Africa/Luanda -Druntime.java=18`

**Applicable branches:**
main

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

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.reservedstate.service.FileSettingsServiceIT&tests.test=testErrorSaved

**Failure excerpt:**
```
org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException: failed to process cluster event (delete_repository [*]) within 30s

  at __randomizedtesting.SeedInfo.seed([762F971779043BEB:C5DE1806AEE40E21]:0)
  at org.elasticsearch.cluster.service.MasterService$Batcher.lambda$onTimeout$1(MasterService.java:165)
  at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:825)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
  at java.lang.Thread.run(Thread.java:833)

```
server/src/main/java/org/elasticsearch/cluster/metadata/ReservedStateMetadata.java
public static ReservedStateMetadata readFrom(StreamInput in) throws IOException {
        Builder builder = new Builder(in.readString()).version(in.readLong());
        int handlersSize = in.readVInt();
        for (int i = 0; i < handlersSize; i++) {
            ReservedStateHandlerMetadata handler = ReservedStateHandlerMetadata.readFrom(in);
            builder.putHandler(handler);
        }
        builder.errorMetadata(in.readOptionalWriteable(ReservedStateErrorMetadata::readFrom));
        return builder.build();
    }
    @Override
    public void writeTo(StreamOutput out) throws IOException {
        out.writeString(namespace);
        out.writeLong(version);
        out.writeCollection(handlers.values());
        out.writeOptionalWriteable(errorMetadata);
    }
    /**
     * Reads an {@link ReservedStateMetadata} {@link Diff} from {@link StreamInput}
     *
     * @param in the {@link StreamInput} to read the diff from
     * @return a {@link Diff} of {@link ReservedStateMetadata}
     * @throws IOException
     */
    public static Diff<ReservedStateMetadata> readDiffFrom(StreamInput in) throws IOException {
        return SimpleDiffable.readDiffFrom(ReservedStateMetadata::readFrom, in);
    }
    /**
     * Convenience method for creating a {@link Builder} for {@link ReservedStateMetadata}
     *