--- a/src/java.base/share/classes/java/util/concurrent/ThreadPoolExecutor.java	Thu Oct 17 07:31:35 2019 +0800
+++ b/src/java.base/share/classes/java/util/concurrent/ThreadPoolExecutor.java	Wed Oct 16 16:55:52 2019 -0700
@@ -604,8 +604,10 @@
         private static final long serialVersionUID = 6138294804551838833L;
 
         /** Thread this worker is running in.  Null if factory fails. */
+        @SuppressWarnings("serial") // Unlikely to be 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;