Update ConfigRegionStateMachine.java

Author: CRZbulabula

iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/consensus/statemachine/ConfigRegionStateMachine.java

@@ -58,6 +58,7 @@
 import java.nio.ByteBuffer;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
@@ -337,11 +338,11 @@ private void becomeLeader(final long epoch) {
     }
 
     // Start the remaining leader services in parallel and wait for all of them to finish.
-    final CompletableFuture<?>[] startups =
-        leaderServiceStartups().stream()
-            .map(startup -> startInParallelIfEpochCurrent(epoch, startup))
-            .toArray(CompletableFuture[]::new);
-    CompletableFuture.allOf(startups).join();
+    final List<CompletableFuture<Void>> startups = new ArrayList<>();
+    for (final Runnable startup : leaderServiceStartups()) {
+      startups.add(startInParallelIfEpochCurrent(epoch, startup));
+    }
+    CompletableFuture.allOf(startups.toArray(new CompletableFuture[0])).join();
 
     if (!isCurrentLeaderServicesEpoch(epoch)) {
       return;