/// <summary>Add all nodes from a dependent nodes list to excludedNodes.</summary>
/// <returns>number of new excluded nodes</returns>
private int AddDependentNodesToExcludedNodes(DatanodeDescriptor chosenNode, ICollection
<Node> excludedNodes)
{
if (this.host2datanodeMap == null)
{
return(0);
}
int countOfExcludedNodes = 0;
foreach (string hostname in chosenNode.GetDependentHostNames())
{
DatanodeDescriptor node = this.host2datanodeMap.GetDataNodeByHostName(hostname);
if (node != null)
{
if (excludedNodes.AddItem(node))
{
countOfExcludedNodes++;
}
}
else
{
Log.Warn("Not able to find datanode " + hostname + " which has dependency with datanode "
+ chosenNode.GetHostName());
}
}
return(countOfExcludedNodes);
}