8154017: Shutdown hooks are racing against shutdown sequence, if...

8154017: Shutdown hooks are racing against shutdown sequence, if System.exit()-calling thread is interrupted
Reviewed-by: coffeys

src/share/classes/java/lang/ApplicationShutdownHooks.java

@@ -102,9 +102,13 @@ class ApplicationShutdownHooks {
             hook.start();
         }
         for (Thread hook : threads) {
-            try {
-                hook.join();
-            } catch (InterruptedException x) { }
+            while (true) {
+                try {
+                    hook.join();
+                    break;
+                } catch (InterruptedException ignored) {
+                }
+            }
         }
     }
 }

test/java/lang/Runtime/shutdown/ShutdownInterruptedMain.java

+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8154017
+ * @library /lib/testlibrary
+ * @build jdk.testlibrary.*
+ * @summary Shutdown hooks are racing against shutdown sequence,
+            if System.exit()-calling thread is interrupted
+ * @run main ShutdownInterruptedMain exec
+ */
+
+import jdk.testlibrary.OutputAnalyzer;
+import static jdk.testlibrary.ProcessTools.createJavaProcessBuilder;
+import static jdk.testlibrary.ProcessTools.executeProcess;
+
+public class ShutdownInterruptedMain {
+
+    public static void main(String[] args) throws Throwable {
+        if (args.length > 0) {
+            ProcessBuilder pb = createJavaProcessBuilder(true, "ShutdownInterruptedMain");
+            OutputAnalyzer output = executeProcess(pb);
+            output.shouldContain("Shutdown Hook");
+            output.shouldHaveExitValue(0);
+            return;
+        }
+
+        Runtime.getRuntime().addShutdownHook(new Thread() {
+            @Override
+            public void run() {
+                // Wait for the race to unfold:
+                try {
+                    Thread.sleep(5_000);
+                } catch (InterruptedException e) {}
+                System.out.println("Shutdown Hook");
+                System.out.flush();
+            }
+        });
+        Thread.currentThread().interrupt();
+        System.exit(0);
+    }
+}