/// <summary>
/// Test that when access time updates are not needed, the FSNamesystem
/// write lock is not taken by getBlockLocations.
/// </summary>
/// <remarks>
/// Test that when access time updates are not needed, the FSNamesystem
/// write lock is not taken by getBlockLocations.
/// Regression test for HDFS-3981.
/// </remarks>
/// <exception cref="System.IO.IOException"/>
public virtual void TestGetBlockLocationsOnlyUsesReadLock()
{
Configuration conf = new HdfsConfiguration();
conf.SetInt(DFSConfigKeys.DfsNamenodeAccesstimePrecisionKey, 100 * 1000);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(0).Build();
ReentrantReadWriteLock spyLock = NameNodeAdapter.SpyOnFsLock(cluster.GetNamesystem
());
try
{
// Create empty file in the FSN.
Path p = new Path("/empty-file");
DFSTestUtil.CreateFile(cluster.GetFileSystem(), p, 0, (short)1, 0L);
// getBlockLocations() should not need the write lock, since we just created
// the file (and thus its access time is already within the 100-second
// accesstime precision configured above).
MockitoUtil.DoThrowWhenCallStackMatches(new Exception("Should not need write lock"
), ".*getBlockLocations.*").When(spyLock).WriteLock();
cluster.GetFileSystem().GetFileBlockLocations(p, 0, 100);
}
finally
{
cluster.Shutdown();
}
}
public virtual void Setup()
{
mockProtocol = MockitoUtil.MockProtocol <HAServiceProtocol>();
mockZkfcProtocol = MockitoUtil.MockProtocol <ZKFCProtocol>();
tool = new _DFSHAAdmin_118(this);
// OVerride the target to return our mock protocol
// mock setup doesn't really throw
tool.SetConf(GetHAConf());
tool.SetErrOut(new TextWriter(errOutBytes));
tool.SetOut(new TextWriter(outBytes));
}
public virtual void TestStopMockObject()
{
RPC.StopProxy(MockitoUtil.MockProtocol <TestRPC.TestProtocol>());
}
