/// <returns>
/// the timestamp of the last renewal of the given lease,
/// or -1 in the case that the lease doesn't exist.
/// </returns>
public static long GetLeaseRenewalTime(NameNode nn, string path)
{
LeaseManager lm = nn.GetNamesystem().leaseManager;
LeaseManager.Lease l = lm.GetLeaseByPath(path);
if (l == null)
{
return(-1);
}
return(l.GetLastUpdate());
}
public virtual void TestFSNamespaceClearLeases()
{
Configuration conf = new HdfsConfiguration();
FilePath nameDir = new FilePath(MiniDFSCluster.GetBaseDirectory(), "name");
conf.Set(DFSConfigKeys.DfsNamenodeNameDirKey, nameDir.GetAbsolutePath());
NameNode.InitMetrics(conf, HdfsServerConstants.NamenodeRole.Namenode);
DFSTestUtil.FormatNameNode(conf);
FSNamesystem fsn = FSNamesystem.LoadFromDisk(conf);
LeaseManager leaseMan = fsn.GetLeaseManager();
leaseMan.AddLease("client1", "importantFile");
NUnit.Framework.Assert.AreEqual(1, leaseMan.CountLease());
fsn.Clear();
leaseMan = fsn.GetLeaseManager();
NUnit.Framework.Assert.AreEqual(0, leaseMan.CountLease());
}
/// <summary>
/// Check that even if LeaseManager.checkLease is not able to relinquish
/// leases, the Namenode does't enter an infinite loop while holding the FSN
/// write lock and thus become unresponsive
/// </summary>
public virtual void TestCheckLeaseNotInfiniteLoop()
{
FSDirectory dir = Org.Mockito.Mockito.Mock <FSDirectory>();
FSNamesystem fsn = Org.Mockito.Mockito.Mock <FSNamesystem>();
Org.Mockito.Mockito.When(fsn.IsRunning()).ThenReturn(true);
Org.Mockito.Mockito.When(fsn.HasWriteLock()).ThenReturn(true);
Org.Mockito.Mockito.When(fsn.GetFSDirectory()).ThenReturn(dir);
LeaseManager lm = new LeaseManager(fsn);
//Make sure the leases we are going to add exceed the hard limit
lm.SetLeasePeriod(0, 0);
//Add some leases to the LeaseManager
lm.AddLease("holder1", "src1");
lm.AddLease("holder2", "src2");
lm.AddLease("holder3", "src3");
NUnit.Framework.Assert.AreEqual(lm.GetNumSortedLeases(), 3);
//Initiate a call to checkLease. This should exit within the test timeout
lm.CheckLeases();
}
public virtual void TestRemoveLeaseWithPrefixPath()
{
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(2).Build();
cluster.WaitActive();
LeaseManager lm = NameNodeAdapter.GetLeaseManager(cluster.GetNamesystem());
lm.AddLease("holder1", "/a/b");
lm.AddLease("holder2", "/a/c");
NUnit.Framework.Assert.IsNotNull(lm.GetLeaseByPath("/a/b"));
NUnit.Framework.Assert.IsNotNull(lm.GetLeaseByPath("/a/c"));
lm.RemoveLeaseWithPrefixPath("/a");
NUnit.Framework.Assert.IsNull(lm.GetLeaseByPath("/a/b"));
NUnit.Framework.Assert.IsNull(lm.GetLeaseByPath("/a/c"));
lm.AddLease("holder1", "/a/b");
lm.AddLease("holder2", "/a/c");
lm.RemoveLeaseWithPrefixPath("/a/");
NUnit.Framework.Assert.IsNull(lm.GetLeaseByPath("/a/b"));
NUnit.Framework.Assert.IsNull(lm.GetLeaseByPath("/a/c"));
}
internal Monitor(LeaseManager _enclosing)
{
this._enclosing = _enclosing;
}
/// <summary>Only LeaseManager object can create a lease</summary>
private Lease(LeaseManager _enclosing, string holder)
{
this._enclosing = _enclosing;
this.holder = holder;
this.Renew();
}
