/// <summary>Test for HDFS-2812.</summary>
/// <remarks>
/// Test for HDFS-2812. Since lease renewals go from the client
/// only to the active NN, the SBN will have out-of-date lease
/// info when it becomes active. We need to make sure we don't
/// accidentally mark the leases as expired when the failover
/// proceeds.
/// </remarks>
/// <exception cref="System.Exception"/>
public virtual void TestLeasesRenewedOnTransition()
{
Configuration conf = new Configuration();
conf.SetInt(DFSConfigKeys.DfsHaTaileditsPeriodKey, 1);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NnTopology(MiniDFSNNTopology
.SimpleHATopology()).NumDataNodes(1).Build();
FSDataOutputStream stm = null;
FileSystem fs = HATestUtil.ConfigureFailoverFs(cluster, conf);
NameNode nn0 = cluster.GetNameNode(0);
NameNode nn1 = cluster.GetNameNode(1);
try
{
cluster.WaitActive();
cluster.TransitionToActive(0);
Log.Info("Starting with NN 0 active");
stm = fs.Create(TestFilePath);
long nn0t0 = NameNodeAdapter.GetLeaseRenewalTime(nn0, TestFileStr);
NUnit.Framework.Assert.IsTrue(nn0t0 > 0);
long nn1t0 = NameNodeAdapter.GetLeaseRenewalTime(nn1, TestFileStr);
NUnit.Framework.Assert.AreEqual("Lease should not yet exist on nn1", -1, nn1t0);
Sharpen.Thread.Sleep(5);
// make sure time advances!
HATestUtil.WaitForStandbyToCatchUp(nn0, nn1);
long nn1t1 = NameNodeAdapter.GetLeaseRenewalTime(nn1, TestFileStr);
NUnit.Framework.Assert.IsTrue("Lease should have been created on standby. Time was: "
+ nn1t1, nn1t1 > nn0t0);
Sharpen.Thread.Sleep(5);
// make sure time advances!
Log.Info("Failing over to NN 1");
cluster.TransitionToStandby(0);
cluster.TransitionToActive(1);
long nn1t2 = NameNodeAdapter.GetLeaseRenewalTime(nn1, TestFileStr);
NUnit.Framework.Assert.IsTrue("Lease should have been renewed by failover process"
, nn1t2 > nn1t1);
}
finally
{
IOUtils.CloseStream(stm);
cluster.Shutdown();
}
}
