undo executorservice close

planetiler-core/src/main/java/com/onthegomap/planetiler/stats/PrometheusStats.java

@@ -213,7 +213,7 @@ class PrometheusStats implements Stats {
 
   @Override
   public void close() {
-    executor.close();
+    executor.shutdown();
     push();
   }
 

planetiler-core/src/main/java/com/onthegomap/planetiler/worker/Worker.java

@@ -54,7 +54,7 @@ public class Worker {
   public Worker(String prefix, Stats stats, int threads, IntConsumerThatThrows task) {
     this.prefix = prefix;
     stats.gauge(prefix + "_threads", threads);
-    try (var es = Executors.newFixedThreadPool(threads, new NamedThreadFactory(prefix))) {
+    var es = Executors.newFixedThreadPool(threads, new NamedThreadFactory(prefix));
     String parentStage = LogUtil.getStage();
     List<CompletableFuture<?>> results = new ArrayList<>();
     for (int i = 0; i < threads; i++) {
@@ -79,9 +79,9 @@ public class Worker {
         }
       }, es));
     }
+    es.shutdown();
     done = joinFutures(results);
   }
-  }
 
   /**
    * Returns a future that completes successfully when all {@code futures} complete, or fails immediately when the first