/// <summary>Get the number of live datanodes.</summary>
/// <param name="json">JSON string that contains live node status.</param>
/// <param name="nn">namenode status to return information in</param>
/// <exception cref="System.IO.IOException"/>
private static void GetLiveNodeCount(string json, ClusterJspHelper.NamenodeStatus
nn)
{
// Map of datanode host to (map of attribute name to value)
IDictionary <string, IDictionary <string, object> > nodeMap = GetNodeMap(json);
if (nodeMap == null || nodeMap.IsEmpty())
{
return;
}
nn.liveDatanodeCount = nodeMap.Count;
foreach (KeyValuePair <string, IDictionary <string, object> > entry in nodeMap)
{
// Inner map of attribute name to value
IDictionary <string, object> innerMap = entry.Value;
if (innerMap != null)
{
if (innerMap["adminState"].Equals(DatanodeInfo.AdminStates.Decommissioned.ToString
()))
{
nn.liveDecomCount++;
}
}
}
}
public virtual void AddNamenodeStatus(ClusterJspHelper.NamenodeStatus nn)
{
nnList.AddItem(nn);
// Add namenode status to cluster status
totalFilesAndDirectories += nn.filesAndDirectories;
total_sum += nn.capacity;
free_sum += nn.free;
clusterDfsUsed += nn.bpUsed;
nonDfsUsed_sum += nn.nonDfsUsed;
}
/// <exception cref="System.IO.IOException"/>
/// <exception cref="Javax.Management.MalformedObjectNameException"/>
/// <exception cref="System.FormatException"/>
public virtual ClusterJspHelper.NamenodeStatus GetNamenodeStatus(string props)
{
ClusterJspHelper.NamenodeStatus nn = new ClusterJspHelper.NamenodeStatus();
nn.host = host;
nn.filesAndDirectories = GetProperty(props, "TotalFiles").GetLongValue();
nn.capacity = GetProperty(props, "Total").GetLongValue();
nn.free = GetProperty(props, "Free").GetLongValue();
nn.bpUsed = GetProperty(props, "BlockPoolUsedSpace").GetLongValue();
nn.nonDfsUsed = GetProperty(props, "NonDfsUsedSpace").GetLongValue();
nn.blocksCount = GetProperty(props, "TotalBlocks").GetLongValue();
nn.missingBlocksCount = GetProperty(props, "NumberOfMissingBlocks").GetLongValue(
);
nn.httpAddress = httpAddress.ToURL();
GetLiveNodeCount(GetProperty(props, "LiveNodes").AsText(), nn);
GetDeadNodeCount(GetProperty(props, "DeadNodes").AsText(), nn);
nn.softwareVersion = GetProperty(props, "SoftwareVersion").GetTextValue();
return(nn);
}
/// <summary>JSP helper function that generates cluster health report.</summary>
/// <remarks>
/// JSP helper function that generates cluster health report. When
/// encountering exception while getting Namenode status, the exception will
/// be listed on the page with corresponding stack trace.
/// </remarks>
internal virtual ClusterJspHelper.ClusterStatus GenerateClusterHealthReport()
{
ClusterJspHelper.ClusterStatus cs = new ClusterJspHelper.ClusterStatus();
Configuration conf = new Configuration();
IList <DFSUtil.ConfiguredNNAddress> nns = null;
try
{
nns = DFSUtil.FlattenAddressMap(DFSUtil.GetNNServiceRpcAddresses(conf));
}
catch (Exception e)
{
// Could not build cluster status
cs.SetError(e);
return(cs);
}
// Process each namenode and add it to ClusterStatus
foreach (DFSUtil.ConfiguredNNAddress cnn in nns)
{
IPEndPoint isa = cnn.GetAddress();
ClusterJspHelper.NamenodeMXBeanHelper nnHelper = null;
try
{
nnHelper = new ClusterJspHelper.NamenodeMXBeanHelper(isa, conf);
string mbeanProps = QueryMbean(nnHelper.httpAddress, conf);
ClusterJspHelper.NamenodeStatus nn = nnHelper.GetNamenodeStatus(mbeanProps);
if (cs.clusterid.IsEmpty() || cs.clusterid.Equals(string.Empty))
{
// Set clusterid only once
cs.clusterid = nnHelper.GetClusterId(mbeanProps);
}
cs.AddNamenodeStatus(nn);
}
catch (Exception e)
{
// track exceptions encountered when connecting to namenodes
cs.AddException(isa.GetHostName(), e);
continue;
}
}
return(cs);
}
/// <summary>Count the number of dead datanode.</summary>
/// <param name="nn">namenode</param>
/// <param name="json">JSON string</param>
/// <exception cref="System.IO.IOException"/>
private static void GetDeadNodeCount(string json, ClusterJspHelper.NamenodeStatus
nn)
{
IDictionary <string, IDictionary <string, object> > nodeMap = GetNodeMap(json);
if (nodeMap == null || nodeMap.IsEmpty())
{
return;
}
nn.deadDatanodeCount = nodeMap.Count;
foreach (KeyValuePair <string, IDictionary <string, object> > entry in nodeMap)
{
IDictionary <string, object> innerMap = entry.Value;
if (innerMap != null && !innerMap.IsEmpty())
{
if (((bool)innerMap["decommissioned"]) == true)
{
nn.deadDecomCount++;
}
}
}
}