c1Src.open();
String c2 = "rpcSource(1237)";
ThriftEventSource c2Src = (ThriftEventSource) FlumeBuilder.buildSource(
LogicalNodeContext.testingContext(), c2);
c2Src.open();
// create agentDFOChain sink
File tmpDir = FileUtil.mktempdir();
String spec = "agentDFOChain(\"localhost:1236\", \"localhost:1237\")";
CompositeSink snk = new CompositeSink(new LogicalNodeContext(