public virtual void TestHANameNodesWithFederation()
{
HdfsConfiguration conf = new HdfsConfiguration();
string Ns1Nn1Host = "ns1-nn1.example.com:8020";
string Ns1Nn2Host = "ns1-nn2.example.com:8020";
string Ns2Nn1Host = "ns2-nn1.example.com:8020";
string Ns2Nn2Host = "ns2-nn2.example.com:8020";
conf.Set(CommonConfigurationKeys.FsDefaultNameKey, "hdfs://ns1");
// Two nameservices, each with two NNs.
conf.Set(DFSConfigKeys.DfsNameservices, "ns1,ns2");
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsHaNamenodesKeyPrefix, "ns1"), "ns1-nn1,ns1-nn2"
);
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsHaNamenodesKeyPrefix, "ns2"), "ns2-nn1,ns2-nn2"
);
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsNamenodeRpcAddressKey, "ns1", "ns1-nn1"
), Ns1Nn1Host);
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsNamenodeRpcAddressKey, "ns1", "ns1-nn2"
), Ns1Nn2Host);
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsNamenodeRpcAddressKey, "ns2", "ns2-nn1"
), Ns2Nn1Host);
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsNamenodeRpcAddressKey, "ns2", "ns2-nn2"
), Ns2Nn2Host);
IDictionary <string, IDictionary <string, IPEndPoint> > map = DFSUtil.GetHaNnRpcAddresses
(conf);
NUnit.Framework.Assert.IsTrue(HAUtil.IsHAEnabled(conf, "ns1"));
NUnit.Framework.Assert.IsTrue(HAUtil.IsHAEnabled(conf, "ns2"));
NUnit.Framework.Assert.IsFalse(HAUtil.IsHAEnabled(conf, "ns3"));
NUnit.Framework.Assert.AreEqual(Ns1Nn1Host, map["ns1"]["ns1-nn1"].ToString());
NUnit.Framework.Assert.AreEqual(Ns1Nn2Host, map["ns1"]["ns1-nn2"].ToString());
NUnit.Framework.Assert.AreEqual(Ns2Nn1Host, map["ns2"]["ns2-nn1"].ToString());
NUnit.Framework.Assert.AreEqual(Ns2Nn2Host, map["ns2"]["ns2-nn2"].ToString());
NUnit.Framework.Assert.AreEqual(Ns1Nn1Host, DFSUtil.GetNamenodeServiceAddr(conf,
"ns1", "ns1-nn1"));
NUnit.Framework.Assert.AreEqual(Ns1Nn2Host, DFSUtil.GetNamenodeServiceAddr(conf,
"ns1", "ns1-nn2"));
NUnit.Framework.Assert.AreEqual(Ns2Nn1Host, DFSUtil.GetNamenodeServiceAddr(conf,
"ns2", "ns2-nn1"));
// No nameservice was given and we can't determine which service addr
// to use as two nameservices could share a namenode ID.
NUnit.Framework.Assert.AreEqual(null, DFSUtil.GetNamenodeServiceAddr(conf, null,
"ns1-nn1"));
// Ditto for nameservice IDs, if multiple are defined
NUnit.Framework.Assert.AreEqual(null, DFSUtil.GetNamenodeNameServiceId(conf));
NUnit.Framework.Assert.AreEqual(null, DFSUtil.GetSecondaryNameServiceId(conf));
ICollection <URI> uris = DFSUtil.GetNameServiceUris(conf, DFSConfigKeys.DfsNamenodeRpcAddressKey
);
NUnit.Framework.Assert.AreEqual(2, uris.Count);
NUnit.Framework.Assert.IsTrue(uris.Contains(new URI("hdfs://ns1")));
NUnit.Framework.Assert.IsTrue(uris.Contains(new URI("hdfs://ns2")));
}
public virtual void TestMultipleNamenodes()
{
HdfsConfiguration conf = new HdfsConfiguration();
conf.Set(DFSConfigKeys.DfsNameservices, "nn1,nn2");
// Test - configured list of namenodes are returned
string Nn1Address = "localhost:9000";
string Nn2Address = "localhost:9001";
string Nn3Address = "localhost:9002";
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsNamenodeRpcAddressKey, "nn1"), Nn1Address
);
conf.Set(DFSUtil.AddKeySuffixes(DFSConfigKeys.DfsNamenodeRpcAddressKey, "nn2"), Nn2Address
);
IDictionary <string, IDictionary <string, IPEndPoint> > nnMap = DFSUtil.GetNNServiceRpcAddresses
(conf);
NUnit.Framework.Assert.AreEqual(2, nnMap.Count);
IDictionary <string, IPEndPoint> nn1Map = nnMap["nn1"];
NUnit.Framework.Assert.AreEqual(1, nn1Map.Count);
IPEndPoint addr = nn1Map[null];
NUnit.Framework.Assert.AreEqual("localhost", addr.GetHostName());
NUnit.Framework.Assert.AreEqual(9000, addr.Port);
IDictionary <string, IPEndPoint> nn2Map = nnMap["nn2"];
NUnit.Framework.Assert.AreEqual(1, nn2Map.Count);
addr = nn2Map[null];
NUnit.Framework.Assert.AreEqual("localhost", addr.GetHostName());
NUnit.Framework.Assert.AreEqual(9001, addr.Port);
// Test - can look up nameservice ID from service address
CheckNameServiceId(conf, Nn1Address, "nn1");
CheckNameServiceId(conf, Nn2Address, "nn2");
CheckNameServiceId(conf, Nn3Address, null);
// HA is not enabled in a purely federated config
NUnit.Framework.Assert.IsFalse(HAUtil.IsHAEnabled(conf, "nn1"));
NUnit.Framework.Assert.IsFalse(HAUtil.IsHAEnabled(conf, "nn2"));
}