8257468: runtime/whitebox/TestWBDeflateIdleMonitors.java fails with Monitor should be deflated.: expected true to equal false

Reviewed-by: hseigel

Author: Daniel D. Daugherty

test/hotspot/jtreg/runtime/whitebox/TestWBDeflateIdleMonitors.java

@@ -40,6 +40,8 @@
 import sun.hotspot.WhiteBox;
 
 public class TestWBDeflateIdleMonitors {
+ static final int N_DELAY = 1000; // delay between tries
+ static final int N_TRIES = 5; // number of times to try deflation
 
  public static void main(String args[]) throws Exception {
  ProcessBuilder pb = ProcessTools.createTestJvm(
@@ -68,9 +70,22 @@ public static void main(String args[]) {
  Asserts.assertEQ(wb.isMonitorInflated(obj), true,
  "Monitor should be inflated.");
  }
- boolean did_deflation = wb.deflateIdleMonitors();
- Asserts.assertEQ(did_deflation, true,
- "deflateIdleMonitors() should have worked.");
+ for (int cnt = 1; cnt <= N_TRIES; cnt++) {
+ System.out.println("Deflation try #" + cnt);
+ boolean did_deflation = wb.deflateIdleMonitors();
+ Asserts.assertEQ(did_deflation, true,
+ "deflateIdleMonitors() should have worked.");
+ if (!wb.isMonitorInflated(obj)) {
+ // Deflation worked so no more retries needed.
+ break;
+ }
+ try {
+ System.out.println("Deflation try #" + cnt + " failed. "
+ + "Delaying before retry.");
+ Thread.sleep(N_DELAY);
+ } catch (InterruptedException ie) {
+ }
+ }
  Asserts.assertEQ(wb.isMonitorInflated(obj), false,
  "Monitor should be deflated.");
  }