internal virtual bool RemoveFromCorruptReplicasMap(Block blk, DatanodeDescriptor
datanode, CorruptReplicasMap.Reason reason)
{
IDictionary <DatanodeDescriptor, CorruptReplicasMap.Reason> datanodes = corruptReplicasMap
[blk];
if (datanodes == null)
{
return(false);
}
// if reasons can be compared but don't match, return false.
CorruptReplicasMap.Reason storedReason = datanodes[datanode];
if (reason != CorruptReplicasMap.Reason.Any && storedReason != null && reason !=
storedReason)
{
return(false);
}
if (Sharpen.Collections.Remove(datanodes, datanode) != null)
{
// remove the replicas
if (datanodes.IsEmpty())
{
// remove the block if there is no more corrupted replicas
Sharpen.Collections.Remove(corruptReplicasMap, blk);
}
return(true);
}
return(false);
}
/// <summary>
/// return the reason about corrupted replica for a given block
/// on a given dn
/// </summary>
/// <param name="block">block that has corrupted replica</param>
/// <param name="node">datanode that contains this corrupted replica</param>
/// <returns>reason</returns>
internal virtual string GetCorruptReason(Block block, DatanodeDescriptor node)
{
CorruptReplicasMap.Reason reason = null;
if (corruptReplicasMap.Contains(block))
{
if (corruptReplicasMap[block].Contains(node))
{
reason = corruptReplicasMap[block][node];
}
}
if (reason != null)
{
return(reason.ToString());
}
else
{
return(null);
}
}
// not specified.
// wildcard reason
// mismatch in generation stamps
// mismatch in sizes
// invalid state
// client or datanode reported the corruption
/// <summary>Mark the block belonging to datanode as corrupt.</summary>
/// <param name="blk">Block to be added to CorruptReplicasMap</param>
/// <param name="dn">DatanodeDescriptor which holds the corrupt replica</param>
/// <param name="reason">a textual reason (for logging purposes)</param>
/// <param name="reasonCode">the enum representation of the reason</param>
internal virtual void AddToCorruptReplicasMap(Block blk, DatanodeDescriptor dn, string
reason, CorruptReplicasMap.Reason reasonCode)
{
IDictionary <DatanodeDescriptor, CorruptReplicasMap.Reason> nodes = corruptReplicasMap
[blk];
if (nodes == null)
{
nodes = new Dictionary <DatanodeDescriptor, CorruptReplicasMap.Reason>();
corruptReplicasMap[blk] = nodes;
}
string reasonText;
if (reason != null)
{
reasonText = " because " + reason;
}
else
{
reasonText = string.Empty;
}
if (!nodes.Keys.Contains(dn))
{
NameNode.blockStateChangeLog.Info("BLOCK NameSystem.addToCorruptReplicasMap: {} added as corrupt on "
+ "{} by {} {}", blk.GetBlockName(), dn, Org.Apache.Hadoop.Ipc.Server.GetRemoteIp
(), reasonText);
}
else
{
NameNode.blockStateChangeLog.Info("BLOCK NameSystem.addToCorruptReplicasMap: duplicate requested for"
+ " {} to add as corrupt on {} by {} {}", blk.GetBlockName(), dn, Org.Apache.Hadoop.Ipc.Server
.GetRemoteIp(), reasonText);
}
// Add the node or update the reason.
nodes[dn] = reasonCode;
}
