public virtual void TestNameNode()
{
int numDatanodes = 2;
cluster = new MiniDFSCluster.Builder(config).NumDataNodes(numDatanodes).Build();
cluster.WaitActive();
WriteFile(cluster.GetFileSystem(), new Path("/test1"), 2);
JMXGet jmx = new JMXGet();
string serviceName = "NameNode";
jmx.SetService(serviceName);
jmx.Init();
// default lists namenode mbeans only
NUnit.Framework.Assert.IsTrue("error printAllValues", CheckPrintAllValues(jmx));
//get some data from different source
NUnit.Framework.Assert.AreEqual(numDatanodes, System.Convert.ToInt32(jmx.GetValue
("NumLiveDataNodes")));
MetricsAsserts.AssertGauge("CorruptBlocks", long.Parse(jmx.GetValue("CorruptBlocks"
)), MetricsAsserts.GetMetrics("FSNamesystem"));
NUnit.Framework.Assert.AreEqual(numDatanodes, System.Convert.ToInt32(jmx.GetValue
("NumOpenConnections")));
cluster.Shutdown();
MBeanServerConnection mbsc = ManagementFactory.GetPlatformMBeanServer();
ObjectName query = new ObjectName("Hadoop:service=" + serviceName + ",*");
ICollection <ObjectName> names = mbsc.QueryNames(query, null);
NUnit.Framework.Assert.IsTrue("No beans should be registered for " + serviceName,
names.IsEmpty());
}
public virtual void TestDataNode()
{
int numDatanodes = 2;
cluster = new MiniDFSCluster.Builder(config).NumDataNodes(numDatanodes).Build();
cluster.WaitActive();
WriteFile(cluster.GetFileSystem(), new Path("/test"), 2);
JMXGet jmx = new JMXGet();
string serviceName = "DataNode";
jmx.SetService(serviceName);
jmx.Init();
NUnit.Framework.Assert.AreEqual(fileSize, System.Convert.ToInt32(jmx.GetValue("BytesWritten"
)));
cluster.Shutdown();
MBeanServerConnection mbsc = ManagementFactory.GetPlatformMBeanServer();
ObjectName query = new ObjectName("Hadoop:service=" + serviceName + ",*");
ICollection <ObjectName> names = mbsc.QueryNames(query, null);
NUnit.Framework.Assert.IsTrue("No beans should be registered for " + serviceName,
names.IsEmpty());
}
/// <exception cref="System.Exception">initializes MBeanServer</exception>
public virtual void Init()
{
Err("init: server=" + server + ";port=" + port + ";service=" + service + ";localVMUrl="
+ localVMUrl);
string url_string = null;
// build connection url
if (localVMUrl != null)
{
// use
// jstat -snap <vmpid> | grep sun.management.JMXConnectorServer.address
// to get url
url_string = localVMUrl;
Err("url string for local pid = " + localVMUrl + " = " + url_string);
}
else
{
if (!port.IsEmpty() && !server.IsEmpty())
{
// using server and port
url_string = "service:jmx:rmi:///jndi/rmi://" + server + ":" + port + "/jmxrmi";
}
}
// else url stays null
// Create an RMI connector client and
// connect it to the RMI connector server
if (url_string == null)
{
// assume local vm (for example for Testing)
mbsc = ManagementFactory.GetPlatformMBeanServer();
}
else
{
JMXServiceURL url = new JMXServiceURL(url_string);
Err("Create RMI connector and connect to the RMI connector server" + url);
JMXConnector jmxc = JMXConnectorFactory.Connect(url, null);
// Get an MBeanServerConnection
//
Err("\nGet an MBeanServerConnection");
mbsc = jmxc.GetMBeanServerConnection();
}
// Get domains from MBeanServer
//
Err("\nDomains:");
string[] domains = mbsc.GetDomains();
Arrays.Sort(domains);
foreach (string domain in domains)
{
Err("\tDomain = " + domain);
}
// Get MBeanServer's default domain
//
Err("\nMBeanServer default domain = " + mbsc.GetDefaultDomain());
// Get MBean count
//
Err("\nMBean count = " + mbsc.GetMBeanCount());
// Query MBean names for specific domain "hadoop" and service
ObjectName query = new ObjectName("Hadoop:service=" + service + ",*");
hadoopObjectNames = new AList <ObjectName>(5);
Err("\nQuery MBeanServer MBeans:");
ICollection <ObjectName> names = new TreeSet <ObjectName>(mbsc.QueryNames(query, null
));
foreach (ObjectName name in names)
{
hadoopObjectNames.AddItem(name);
Err("Hadoop service: " + name);
}
}
