public virtual void TestReadOnlyReplicaCorrupt()
{
// "Corrupt" a READ_ONLY_SHARED replica by reporting it as a bad replica
client.ReportBadBlocks(new LocatedBlock[] { new LocatedBlock(extendedBlock, new DatanodeInfo
[] { readOnlyDataNode }) });
// There should now be only 1 *location* for the block as the READ_ONLY_SHARED is corrupt
WaitForLocations(1);
// However, the corrupt READ_ONLY_SHARED replica should *not* affect the overall corrupt replicas count
NumberReplicas numberReplicas = blockManager.CountNodes(block);
Assert.AssertThat(numberReplicas.CorruptReplicas(), CoreMatchers.Is(0));
}
/// <exception cref="System.IO.IOException"/>
private void ValidateNumberReplicas(int expectedReplicas)
{
NumberReplicas numberReplicas = blockManager.CountNodes(block);
Assert.AssertThat(numberReplicas.LiveReplicas(), CoreMatchers.Is(expectedReplicas
));
Assert.AssertThat(numberReplicas.ExcessReplicas(), CoreMatchers.Is(0));
Assert.AssertThat(numberReplicas.CorruptReplicas(), CoreMatchers.Is(0));
Assert.AssertThat(numberReplicas.DecommissionedReplicas(), CoreMatchers.Is(0));
Assert.AssertThat(numberReplicas.ReplicasOnStaleNodes(), CoreMatchers.Is(0));
BlockManagerTestUtil.UpdateState(blockManager);
Assert.AssertThat(blockManager.GetUnderReplicatedBlocksCount(), CoreMatchers.Is(0L
));
Assert.AssertThat(blockManager.GetExcessBlocksCount(), CoreMatchers.Is(0L));
}
public virtual void TestNormalReplicaOffline()
{
// Stop the datanode hosting the NORMAL replica
cluster.StopDataNode(normalDataNode.GetXferAddr());
// Force NameNode to detect that the datanode is down
BlockManagerTestUtil.NoticeDeadDatanode(cluster.GetNameNode(), normalDataNode.GetXferAddr
());
// The live replica count should now be zero (since the NORMAL replica is offline)
NumberReplicas numberReplicas = blockManager.CountNodes(block);
Assert.AssertThat(numberReplicas.LiveReplicas(), CoreMatchers.Is(0));
// The block should be reported as under-replicated
BlockManagerTestUtil.UpdateState(blockManager);
Assert.AssertThat(blockManager.GetUnderReplicatedBlocksCount(), CoreMatchers.Is(1L
));
// The BlockManager should be able to heal the replication count back to 1
// by triggering an inter-datanode replication from one of the READ_ONLY_SHARED replicas
BlockManagerTestUtil.ComputeAllPendingWork(blockManager);
DFSTestUtil.WaitForReplication(cluster, extendedBlock, 1, 1, 0);
// There should now be 2 *locations* for the block, and 1 *replica*
Assert.AssertThat(GetLocatedBlock().GetLocations().Length, CoreMatchers.Is(2));
ValidateNumberReplicas(1);
}
