/// <exception cref="System.Exception"/>
internal TestContext(Configuration conf, int numNameServices)
{
this.numNameServices = numNameServices;
MiniDFSCluster.Builder bld = new MiniDFSCluster.Builder(conf).NumDataNodes(1).StoragesPerDatanode
(1);
if (numNameServices > 1)
{
bld.NnTopology(MiniDFSNNTopology.SimpleFederatedTopology(numNameServices));
}
cluster = bld.Build();
cluster.WaitActive();
dfs = new DistributedFileSystem[numNameServices];
for (int i = 0; i < numNameServices; i++)
{
dfs[i] = cluster.GetFileSystem(i);
}
bpids = new string[numNameServices];
for (int i_1 = 0; i_1 < numNameServices; i_1++)
{
bpids[i_1] = cluster.GetNamesystem(i_1).GetBlockPoolId();
}
datanode = cluster.GetDataNodes()[0];
blockScanner = datanode.GetBlockScanner();
for (int i_2 = 0; i_2 < numNameServices; i_2++)
{
dfs[i_2].Mkdirs(new Path("/test"));
}
data = datanode.GetFSDataset();
volumes = data.GetVolumes();
}
/// <exception cref="System.IO.IOException"/>
protected override void DoGet(HttpServletRequest request, HttpServletResponse response
)
{
response.SetContentType("text/plain");
DataNode datanode = (DataNode)GetServletContext().GetAttribute("datanode");
BlockScanner blockScanner = datanode.GetBlockScanner();
StringBuilder buffer = new StringBuilder(8 * 1024);
if (!blockScanner.IsEnabled())
{
Log.Warn("Periodic block scanner is not running");
buffer.Append("Periodic block scanner is not running. " + "Please check the datanode log if this is unexpected."
);
}
else
{
buffer.Append("Block Scanner Statistics\n\n");
blockScanner.PrintStats(buffer);
}
string resp = buffer.ToString();
Log.Trace("Returned Servlet info {}", resp);
response.GetWriter().Write(resp);
}
