/// <exception cref="System.IO.IOException"/>
private void CheckDFSAdminDecommissionStatus(IList <DatanodeDescriptor> expectedDecomm
, DistributedFileSystem dfs, DFSAdmin admin)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
TextWriter ps = new TextWriter(baos);
TextWriter oldOut = System.Console.Out;
Runtime.SetOut(ps);
try
{
// Parse DFSAdmin just to check the count
admin.Report(new string[] { "-decommissioning" }, 0);
string[] lines = baos.ToString().Split("\n");
int num = null;
int count = 0;
foreach (string line in lines)
{
if (line.StartsWith("Decommissioning datanodes"))
{
// Pull out the "(num)" and parse it into an int
string temp = line.Split(" ")[2];
num = System.Convert.ToInt32((string)temp.SubSequence(1, temp.Length - 2));
}
if (line.Contains("Decommission in progress"))
{
count++;
}
}
NUnit.Framework.Assert.IsTrue("No decommissioning output", num != null);
NUnit.Framework.Assert.AreEqual("Unexpected number of decomming DNs", expectedDecomm
.Count, num);
NUnit.Framework.Assert.AreEqual("Unexpected number of decomming DNs", expectedDecomm
.Count, count);
// Check Java API for correct contents
IList <DatanodeInfo> decomming = new AList <DatanodeInfo>(Arrays.AsList(dfs.GetDataNodeStats
(HdfsConstants.DatanodeReportType.Decommissioning)));
NUnit.Framework.Assert.AreEqual("Unexpected number of decomming DNs", expectedDecomm
.Count, decomming.Count);
foreach (DatanodeID id in expectedDecomm)
{
NUnit.Framework.Assert.IsTrue("Did not find expected decomming DN " + id, decomming
.Contains(id));
}
}
finally
{
Runtime.SetOut(oldOut);
}
}
