HDFS-15126. TestDatanodeRegistration#testForcedRegistration fails intermittently. Contributed by Ahmed Hussein.

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDatanodeRegistration.java

@@ -364,14 +364,16 @@ public class TestDatanodeRegistration {
       waitForHeartbeat(dn, dnd);
       assertTrue(dnd.isRegistered());
       assertSame(lastReg, dn.getDNRegistrationForBP(bpId));
-      assertTrue(waitForBlockReport(dn, dnd));
+      assertTrue("block report is not processed for DN " + dnd,
+          waitForBlockReport(dn, dnd));
       assertTrue(dnd.isRegistered());
       assertSame(lastReg, dn.getDNRegistrationForBP(bpId));
 
       // check that block report is not processed and registration didn't
       // change.
       dnd.setForceRegistration(true);
-      assertFalse(waitForBlockReport(dn, dnd));
+      assertFalse("block report is processed for DN " + dnd,
+          waitForBlockReport(dn, dnd));
       assertFalse(dnd.isRegistered());
       assertSame(lastReg, dn.getDNRegistrationForBP(bpId));
 
@@ -382,7 +384,8 @@ public class TestDatanodeRegistration {
       newReg = dn.getDNRegistrationForBP(bpId);
       assertNotSame(lastReg, newReg);
       lastReg = newReg;
-      assertTrue(waitForBlockReport(dn, dnd));
+      assertTrue("block report is not processed for DN " + dnd,
+          waitForBlockReport(dn, dnd));
       assertTrue(dnd.isRegistered());
       assertSame(lastReg, dn.getDNRegistrationForBP(bpId));
 
@@ -447,8 +450,9 @@ public class TestDatanodeRegistration {
         public Boolean get() {
           return lastCount != storage.getBlockReportCount();
         }
-      }, 10, 2000);
+      }, 10, 6000);
     } catch (TimeoutException te) {
+      LOG.error("Timeout waiting for block report for {}", dnd);
       return false;
     }
     return true;