/// <summary>Initialize lease recovery for this block.</summary>
/// <remarks>
/// Initialize lease recovery for this block.
/// Find the first alive data-node starting from the previous primary and
/// make it primary.
/// </remarks>
public virtual void InitializeBlockRecovery(long recoveryId)
{
SetBlockUCState(HdfsServerConstants.BlockUCState.UnderRecovery);
blockRecoveryId = recoveryId;
if (replicas.Count == 0)
{
NameNode.blockStateChangeLog.Warn("BLOCK*" + " BlockInfoUnderConstruction.initLeaseRecovery:"
+ " No blocks found, lease removed.");
}
bool allLiveReplicasTriedAsPrimary = true;
for (int i = 0; i < replicas.Count; i++)
{
// Check if all replicas have been tried or not.
if (replicas[i].IsAlive())
{
allLiveReplicasTriedAsPrimary = (allLiveReplicasTriedAsPrimary && replicas[i].GetChosenAsPrimary
());
}
}
if (allLiveReplicasTriedAsPrimary)
{
// Just set all the replicas to be chosen whether they are alive or not.
for (int i_1 = 0; i_1 < replicas.Count; i_1++)
{
replicas[i_1].SetChosenAsPrimary(false);
}
}
long mostRecentLastUpdate = 0;
BlockInfoContiguousUnderConstruction.ReplicaUnderConstruction primary = null;
primaryNodeIndex = -1;
for (int i_2 = 0; i_2 < replicas.Count; i_2++)
{
// Skip alive replicas which have been chosen for recovery.
if (!(replicas[i_2].IsAlive() && !replicas[i_2].GetChosenAsPrimary()))
{
continue;
}
BlockInfoContiguousUnderConstruction.ReplicaUnderConstruction ruc = replicas[i_2];
long lastUpdate = ruc.GetExpectedStorageLocation().GetDatanodeDescriptor().GetLastUpdateMonotonic
();
if (lastUpdate > mostRecentLastUpdate)
{
primaryNodeIndex = i_2;
primary = ruc;
mostRecentLastUpdate = lastUpdate;
}
}
if (primary != null)
{
primary.GetExpectedStorageLocation().GetDatanodeDescriptor().AddBlockToBeRecovered
(this);
primary.SetChosenAsPrimary(true);
NameNode.blockStateChangeLog.Info("BLOCK* {} recovery started, primary={}", this,
primary);
}
}