test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapTest.java

@@ -81,17 +81,22 @@
 
     private static void testHProfFileFormat(String vmArgs, long heapSize,
             String expectedFormat) throws Exception, IOException,
             InterruptedException, FileNotFoundException {
         ProcessBuilder procBuilder = ProcessTools.createJavaProcessBuilder(
-                "--add-exports=java.management/sun.management=ALL-UNNAMED", vmArgs, "JMapHProfLargeHeapProc", String.valueOf(heapSize));
+                "--add-exports=java.management/sun.management=ALL-UNNAMED",
+                "--add-opens=java.management/sun.management=ALL-UNNAMED",
+                vmArgs, "JMapHProfLargeHeapProc", String.valueOf(heapSize));
         procBuilder.redirectError(ProcessBuilder.Redirect.INHERIT);
         Process largeHeapProc = procBuilder.start();
 
         try (Scanner largeHeapScanner = new Scanner(
                 largeHeapProc.getInputStream());) {
             String pidstring = null;
+            if (!largeHeapScanner.hasNext()) {
+               throw new RuntimeException ("Test failed: could not open largeHeapScanner.");
+            }
             while ((pidstring = largeHeapScanner.findInLine("PID\\[[0-9].*\\]")) == null) {
                 Thread.sleep(500);
             }
             int pid = Integer.parseInt(pidstring.substring(4,
                     pidstring.length() - 1));