/// <exception cref="System.Exception"/> public virtual void TestTimeoutMetric() { Configuration conf = new HdfsConfiguration(); Path path = new Path("/test"); MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(2).Build(); IList <FSDataOutputStream> streams = Lists.NewArrayList(); try { FSDataOutputStream @out = cluster.GetFileSystem().Create(path, (short)2); DataNodeFaultInjector injector = Org.Mockito.Mockito.Mock <DataNodeFaultInjector>( ); Org.Mockito.Mockito.DoThrow(new IOException("mock IOException")).When(injector).WriteBlockAfterFlush (); DataNodeFaultInjector.instance = injector; streams.AddItem(@out); @out.WriteBytes("old gs data\n"); @out.Hflush(); /* Test the metric. */ MetricsRecordBuilder dnMetrics = MetricsAsserts.GetMetrics(cluster.GetDataNodes() [0].GetMetrics().Name()); MetricsAsserts.AssertCounter("DatanodeNetworkErrors", 1L, dnMetrics); /* Test JMX datanode network counts. */ MBeanServer mbs = ManagementFactory.GetPlatformMBeanServer(); ObjectName mxbeanName = new ObjectName("Hadoop:service=DataNode,name=DataNodeInfo" ); object dnc = mbs.GetAttribute(mxbeanName, "DatanodeNetworkCounts"); string allDnc = dnc.ToString(); NUnit.Framework.Assert.IsTrue("expected to see loopback address", allDnc.IndexOf( "127.0.0.1") >= 0); NUnit.Framework.Assert.IsTrue("expected to see networkErrors", allDnc.IndexOf("networkErrors" ) >= 0); } finally { IOUtils.Cleanup(Log, Sharpen.Collections.ToArray(streams, new IDisposable[0])); if (cluster != null) { cluster.Shutdown(); } DataNodeFaultInjector.instance = new DataNodeFaultInjector(); } }
public static void Set(DataNodeFaultInjector injector) { instance = injector; }