src/java.base/share/classes/java/util/concurrent/ThreadPoolExecutor.java

@@ -602,12 +602,14 @@
          * serialVersionUID to suppress a javac warning.
          */
         private static final long serialVersionUID = 6138294804551838833L;
 
         /** Thread this worker is running in.  Null if factory fails. */
+        @SuppressWarnings("serial") // Not statically typed as Serializable
         final Thread thread;
         /** Initial task to run.  Possibly null. */
+        @SuppressWarnings("serial") // Not statically typed as Serializable
         Runnable firstTask;
         /** Per-thread task counter */
         volatile long completedTasks;
 
         // TODO: switch to AbstractQueuedLongSynchronizer and move