fix(memory-leak): working with threadpool

Change work with threadpool allocated in stack to work with common pool

Author: nickkkccc

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Bug fixes
+
+- Fix a memory leak due to the use of a local thread pool
+
 ### Spring-data
 - Add `tarantool-spring-data-35` module with support for Spring Boot 3.5.x and Spring Data 3.5 
 

testcontainers/src/main/java/org/testcontainers/containers/tqe/TQEClusterImpl.java

@@ -10,8 +10,6 @@
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CopyOnWriteArrayList;
-import java.util.concurrent.Executor;
-import java.util.concurrent.Executors;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -71,8 +69,6 @@ public synchronized void stop() {
 
   private static void startParallel(
       Map<String, ? extends Startable> containers, TQEConfigurator configurator) {
-
-    final Executor executor = Executors.newFixedThreadPool(containers.size());
     final List<CompletableFuture<?>> futures = new ArrayList<>(containers.size());
     final CopyOnWriteArrayList<Throwable> errors = new CopyOnWriteArrayList<>();
 
@@ -87,8 +83,7 @@ private static void startParallel(
                         LOGGER.error("Error starting TQE container [container_name='{}']", name, e);
                         errors.add(e);
                       }
-                    },
-                    executor)));
+                    })));
 
     CompletableFuture.allOf(futures.toArray(new CompletableFuture[] {})).join();