public virtual void TestUnderReplicationAfterVolFailure()
{
// This test relies on denying access to data volumes to simulate data volume
// failure. This doesn't work on Windows, because an owner of an object
// always has the ability to read and change permissions on the object.
Assume.AssumeTrue(!Path.Windows);
// Bring up one more datanode
cluster.StartDataNodes(conf, 1, true, null, null);
cluster.WaitActive();
BlockManager bm = cluster.GetNamesystem().GetBlockManager();
Path file1 = new Path("/test1");
DFSTestUtil.CreateFile(fs, file1, 1024, (short)3, 1L);
DFSTestUtil.WaitReplication(fs, file1, (short)3);
// Fail the first volume on both datanodes
FilePath dn1Vol1 = new FilePath(dataDir, "data" + (2 * 0 + 1));
FilePath dn2Vol1 = new FilePath(dataDir, "data" + (2 * 1 + 1));
DataNodeTestUtils.InjectDataDirFailure(dn1Vol1, dn2Vol1);
Path file2 = new Path("/test2");
DFSTestUtil.CreateFile(fs, file2, 1024, (short)3, 1L);
DFSTestUtil.WaitReplication(fs, file2, (short)3);
// underReplicatedBlocks are due to failed volumes
int underReplicatedBlocks = BlockManagerTestUtil.CheckHeartbeatAndGetUnderReplicatedBlocksCount
(cluster.GetNamesystem(), bm);
NUnit.Framework.Assert.IsTrue("There is no under replicated block after volume failure"
, underReplicatedBlocks > 0);
}
