private void CancelJobCommit()
{
lock (this)
{
Sharpen.Thread threadCommitting = jobCommitThread;
if (threadCommitting != null && threadCommitting.IsAlive())
{
Log.Info("Cancelling commit");
threadCommitting.Interrupt();
// wait up to configured timeout for commit thread to finish
long now = context.GetClock().GetTime();
long timeoutTimestamp = now + commitThreadCancelTimeoutMs;
try
{
while (jobCommitThread == threadCommitting && now > timeoutTimestamp)
{
Sharpen.Runtime.Wait(this, now - timeoutTimestamp);
now = context.GetClock().GetTime();
}
}
catch (Exception)
{
}
}
}
}
/// <exception cref="System.Exception"></exception>
private static void RunOnThread(Runnable task)
{
Sharpen.Thread t = new Sharpen.Thread(task);
t.Start();
t.Join(1000);
NUnit.Framework.Assert.IsFalse(t.IsAlive(), "thread has stopped");
}
public void Run()
{
lock (this)
{
while (!terminated && callingThread.IsAlive())
{
try
{
if (0 < deadline)
{
long delay = deadline - Now();
if (delay <= 0)
{
deadline = 0;
callingThread.Interrupt();
}
else
{
Sharpen.Runtime.Wait(this, delay);
}
}
else
{
Sharpen.Runtime.Wait(this, 1000);
}
}
catch (Exception)
{
}
}
}
}
/// <summary>Interrupt the writing thread and wait until it dies</summary>
/// <exception cref="System.IO.IOException">the waiting is interrupted</exception>
public virtual void StopWriter(long xceiverStopTimeout)
{
if (writer != null && writer != Sharpen.Thread.CurrentThread() && writer.IsAlive(
))
{
writer.Interrupt();
try
{
writer.Join(xceiverStopTimeout);
if (writer.IsAlive())
{
string msg = "Join on writer thread " + writer + " timed out";
DataNode.Log.Warn(msg + "\n" + StringUtils.GetStackTrace(writer));
throw new IOException(msg);
}
}
catch (Exception)
{
throw new IOException("Waiting for writer thread is interrupted.");
}
}
}
/// <exception cref="System.Exception"/>
protected override void ServiceStop()
{
if (drainEventsOnStop)
{
blockNewEvents = true;
Log.Info("AsyncDispatcher is draining to stop, igonring any new events.");
long endTime = Runtime.CurrentTimeMillis() + GetConfig().GetLong(YarnConfiguration
.DispatcherDrainEventsTimeout, YarnConfiguration.DefaultDispatcherDrainEventsTimeout
);
lock (waitForDrained)
{
while (!drained && eventHandlingThread != null && eventHandlingThread.IsAlive() &&
Runtime.CurrentTimeMillis() < endTime)
{
Sharpen.Runtime.Wait(waitForDrained, 1000);
Log.Info("Waiting for AsyncDispatcher to drain. Thread state is :" + eventHandlingThread
.GetState());
}
}
}
stopped = true;
if (eventHandlingThread != null)
{
eventHandlingThread.Interrupt();
try
{
eventHandlingThread.Join();
}
catch (Exception ie)
{
Log.Warn("Interrupted Exception while stopping", ie);
}
}
// stop all the components
base.ServiceStop();
}
/// <summary>
/// When an InterruptedException is sent to a thread calling
/// FileChannel#read, the FileChannel is immediately closed and the
/// thread gets an exception.
/// </summary>
/// <remarks>
/// When an InterruptedException is sent to a thread calling
/// FileChannel#read, the FileChannel is immediately closed and the
/// thread gets an exception. This effectively means that we might have
/// someone asynchronously calling close() on the file descriptors we use
/// in BlockReaderLocal. So when unreferencing a ShortCircuitReplica in
/// ShortCircuitCache#unref, we should check if the FileChannel objects
/// are still open. If not, we should purge the replica to avoid giving
/// it out to any future readers.
/// This is a regression test for HDFS-6227: Short circuit read failed
/// due to ClosedChannelException.
/// Note that you may still get ClosedChannelException errors if two threads
/// are reading from the same replica and an InterruptedException is delivered
/// to one of them.
/// </remarks>
/// <exception cref="System.Exception"/>
public virtual void TestPurgingClosedReplicas()
{
BlockReaderTestUtil.EnableBlockReaderFactoryTracing();
AtomicInteger replicasCreated = new AtomicInteger(0);
AtomicBoolean testFailed = new AtomicBoolean(false);
DFSInputStream.tcpReadsDisabledForTesting = true;
BlockReaderFactory.createShortCircuitReplicaInfoCallback = new _ShortCircuitReplicaCreator_443
(replicasCreated);
TemporarySocketDirectory sockDir = new TemporarySocketDirectory();
Configuration conf = CreateShortCircuitConf("testPurgingClosedReplicas", sockDir);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(1).Build();
cluster.WaitActive();
DistributedFileSystem dfs = cluster.GetFileSystem();
string TestFile = "/test_file";
int TestFileLen = 4095;
int Seed = unchecked ((int)(0xFADE0));
DistributedFileSystem fs = (DistributedFileSystem)FileSystem.Get(cluster.GetURI(0
), conf);
DFSTestUtil.CreateFile(fs, new Path(TestFile), TestFileLen, (short)1, Seed);
Semaphore sem = Sharpen.Extensions.CreateSemaphore(0);
IList <LocatedBlock> locatedBlocks = cluster.GetNameNode().GetRpcServer().GetBlockLocations
(TestFile, 0, TestFileLen).GetLocatedBlocks();
LocatedBlock lblock = locatedBlocks[0];
// first block
byte[] buf = new byte[TestFileLen];
Runnable readerRunnable = new _Runnable_471(cluster, lblock, TestFileLen, sem, buf
, testFailed);
Sharpen.Thread thread = new Sharpen.Thread(readerRunnable);
thread.Start();
// While the thread is reading, send it interrupts.
// These should trigger a ClosedChannelException.
while (thread.IsAlive())
{
sem.AcquireUninterruptibly();
thread.Interrupt();
sem.Release();
}
NUnit.Framework.Assert.IsFalse(testFailed.Get());
// We should be able to read from the file without
// getting a ClosedChannelException.
BlockReader blockReader = null;
try
{
blockReader = BlockReaderTestUtil.GetBlockReader(cluster, lblock, 0, TestFileLen);
blockReader.ReadFully(buf, 0, TestFileLen);
}
finally
{
if (blockReader != null)
{
blockReader.Close();
}
}
byte[] expected = DFSTestUtil.CalculateFileContentsFromSeed(Seed, TestFileLen);
NUnit.Framework.Assert.IsTrue(Arrays.Equals(buf, expected));
// Another ShortCircuitReplica object should have been created.
NUnit.Framework.Assert.AreEqual(2, replicasCreated.Get());
dfs.Close();
cluster.Shutdown();
sockDir.Close();
}
/// <exception cref="System.Exception"></exception>
private static void RunOnThread(Runnable task)
{
Sharpen.Thread t = new Sharpen.Thread(task);
t.Start();
t.Join(1000);
NUnit.Framework.Assert.IsFalse(t.IsAlive(), "thread has stopped");
}
