Remove priviledged thread factory (fix integrated into latest Netty 4.1.118.Final) (#17325)

Signed-off-by: Andriy Redko <drreta@gmail.com>

Author: reta

modules/transport-netty4/src/main/java/org/opensearch/transport/SharedGroupFactory.java

@@ -47,7 +47,7 @@
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.util.concurrent.Future;
 
-import static org.opensearch.common.util.concurrent.OpenSearchExecutors.privilegedDaemonThreadFactory;
+import static org.opensearch.common.util.concurrent.OpenSearchExecutors.daemonThreadFactory;
 
 /**
  * Creates and returns {@link io.netty.channel.EventLoopGroup} instances. It will return a shared group for
@@ -91,7 +91,7 @@ public synchronized SharedGroup getHttpGroup() {
             if (dedicatedHttpGroup == null) {
                 NioEventLoopGroup eventLoopGroup = new NioEventLoopGroup(
                     httpWorkerCount,
-                    privilegedDaemonThreadFactory(settings, HttpServerTransport.HTTP_SERVER_WORKER_THREAD_NAME_PREFIX)
+                    daemonThreadFactory(settings, HttpServerTransport.HTTP_SERVER_WORKER_THREAD_NAME_PREFIX)
                 );
                 dedicatedHttpGroup = new SharedGroup(new RefCountedGroup(eventLoopGroup));
             }
@@ -103,7 +103,7 @@ private SharedGroup getGenericGroup() {
         if (genericGroup == null) {
             EventLoopGroup eventLoopGroup = new NioEventLoopGroup(
                 workerCount,
-                privilegedDaemonThreadFactory(settings, TcpTransport.TRANSPORT_WORKER_THREAD_NAME_PREFIX)
+                daemonThreadFactory(settings, TcpTransport.TRANSPORT_WORKER_THREAD_NAME_PREFIX)
             );
             this.genericGroup = new RefCountedGroup(eventLoopGroup);
         } else {

plugins/transport-reactor-netty4/src/main/java/org/opensearch/transport/reactor/SharedGroupFactory.java

@@ -29,7 +29,7 @@
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.util.concurrent.Future;
 
-import static org.opensearch.common.util.concurrent.OpenSearchExecutors.privilegedDaemonThreadFactory;
+import static org.opensearch.common.util.concurrent.OpenSearchExecutors.daemonThreadFactory;
 
 /**
  * Creates and returns {@link io.netty.channel.EventLoopGroup} instances. It will return a shared group for
@@ -89,7 +89,7 @@ public synchronized SharedGroup getHttpGroup() {
             if (dedicatedHttpGroup == null) {
                 NioEventLoopGroup eventLoopGroup = new NioEventLoopGroup(
                     httpWorkerCount,
-                    privilegedDaemonThreadFactory(settings, HttpServerTransport.HTTP_SERVER_WORKER_THREAD_NAME_PREFIX)
+                    daemonThreadFactory(settings, HttpServerTransport.HTTP_SERVER_WORKER_THREAD_NAME_PREFIX)
                 );
                 dedicatedHttpGroup = new SharedGroup(new RefCountedGroup(eventLoopGroup));
             }
@@ -101,7 +101,7 @@ private SharedGroup getGenericGroup() {
         if (genericGroup == null) {
             EventLoopGroup eventLoopGroup = new NioEventLoopGroup(
                 workerCount,
-                privilegedDaemonThreadFactory(settings, TcpTransport.TRANSPORT_WORKER_THREAD_NAME_PREFIX)
+                daemonThreadFactory(settings, TcpTransport.TRANSPORT_WORKER_THREAD_NAME_PREFIX)
             );
             this.genericGroup = new RefCountedGroup(eventLoopGroup);
         } else {

server/src/main/java/org/opensearch/common/util/concurrent/OpenSearchExecutors.java

@@ -43,8 +43,6 @@
 import org.opensearch.threadpool.RunnableTaskExecutionListener;
 import org.opensearch.threadpool.TaskAwareRunnable;
 
-import java.security.AccessController;
-import java.security.PrivilegedAction;
 import java.util.List;
 import java.util.Optional;
 import java.util.concurrent.AbstractExecutorService;
@@ -384,19 +382,6 @@ public static ThreadFactory daemonThreadFactory(String namePrefix) {
         return new OpenSearchThreadFactory(namePrefix);
     }
 
-    public static ThreadFactory privilegedDaemonThreadFactory(Settings settings, String namePrefix) {
-        return privilegedDaemonThreadFactory(threadName(settings, namePrefix));
-    }
-
-    public static ThreadFactory privilegedDaemonThreadFactory(String nodeName, String namePrefix) {
-        assert nodeName != null && false == nodeName.isEmpty();
-        return privilegedDaemonThreadFactory(threadName(nodeName, namePrefix));
-    }
-
-    public static ThreadFactory privilegedDaemonThreadFactory(String namePrefix) {
-        return new PrivilegedOpenSearchThreadFactory(namePrefix);
-    }
-
     /**
      * A thread factory
      *
@@ -424,42 +409,6 @@ public Thread newThread(Runnable r) {
 
     }
 
-    /**
-     * A thread factory
-     *
-     * @opensearch.internal
-     */
-    static class PrivilegedOpenSearchThreadFactory implements ThreadFactory {
-
-        final ThreadGroup group;
-        final AtomicInteger threadNumber = new AtomicInteger(1);
-        final String namePrefix;
-
-        @SuppressWarnings("removal")
-        PrivilegedOpenSearchThreadFactory(String namePrefix) {
-            this.namePrefix = namePrefix;
-            SecurityManager s = System.getSecurityManager();
-            group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
-        }
-
-        @Override
-        public Thread newThread(Runnable r) {
-            final Thread t = new Thread(group, new Runnable() {
-                @SuppressWarnings({ "deprecation", "removal" })
-                @Override
-                public void run() {
-                    AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
-                        r.run();
-                        return null;
-                    });
-                }
-            }, namePrefix + "[T#" + threadNumber.getAndIncrement() + "]", 0);
-            t.setDaemon(true);
-            return t;
-        }
-
-    }
-
     /**
      * Cannot instantiate.
      */