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6987597: ManagementFactory.getGarbageCollectorMXBeans() returns empty list with CMS
authorjbachorik
Thu, 28 Nov 2013 09:10:18 +0100
changeset 21944 924b78f629be
parent 21943 0fdb9441797f
child 21945 8dd75cf24379
6987597: ManagementFactory.getGarbageCollectorMXBeans() returns empty list with CMS Reviewed-by: mchung
jdk/test/com/sun/management/GarbageCollectorMXBean/LastGCInfo.java file | annotate | diff | comparison | revisions
jdk/test/java/lang/management/GarbageCollectorMXBean/GcInfoCompositeType.java file | annotate | diff | comparison | revisions 
--- a/jdk/test/com/sun/management/GarbageCollectorMXBean/LastGCInfo.java	Wed Nov 27 15:25:36 2013 -0800
+++ b/jdk/test/com/sun/management/GarbageCollectorMXBean/LastGCInfo.java	Thu Nov 28 09:10:18 2013 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2013 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
@@ -27,8 +27,11 @@
  * @summary Sanity Test for GarbageCollectorMXBean.getLastGcInfo().
  * @author  Mandy Chung
  *
- * @run main LastGCInfo
+ * @run main/othervm -XX:-ExplicitGCInvokesConcurrent LastGCInfo
  */
+// Passing "-XX:-ExplicitGCInvokesConcurrent" to force System.gc()
+// run on foreground when CMS is used and prevent situations when "GcInfo"
+// is missing even though System.gc() was successfuly processed.
 
 import java.lang.management.ManagementFactory;
 import java.lang.management.MemoryUsage;
--- a/jdk/test/java/lang/management/GarbageCollectorMXBean/GcInfoCompositeType.java	Wed Nov 27 15:25:36 2013 -0800
+++ b/jdk/test/java/lang/management/GarbageCollectorMXBean/GcInfoCompositeType.java	Thu Nov 28 09:10:18 2013 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2013 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
@@ -26,8 +26,11 @@
  * @bug     6396794
  * @summary Check that LastGcInfo contents are reasonable
  * @author  Eamonn McManus
- * @run     main/othervm GcInfoCompositeType
+ * @run     main/othervm -XX:-ExplicitGCInvokesConcurrent GcInfoCompositeType
  */
+// Passing "-XX:-ExplicitGCInvokesConcurrent" to force System.gc()
+// run on foreground when CMS is used and prevent situations when "GcInfo"
+// is missing even though System.gc() was successfuly processed.
 
 import java.util.*;
 import java.lang.management.*;
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