/**
* Licensed to Cloudera, Inc. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Cloudera, Inc. licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cloudera.flume.master;
import java.io.IOException;
import org.junit.Test;
import com.cloudera.flume.conf.FlumeBuilder;
import com.cloudera.flume.conf.FlumeSpecException;
import com.cloudera.flume.core.EventSink;
import com.cloudera.flume.core.EventSource;
import com.cloudera.util.Benchmark;
public class EvilExhaustConnections {
/**
* This is just to see how many open connections a process can have, and to
* force and out of file handles exception.
*
* Seems to seems to fail around 1000 connections, due to
* UnkonwnHostExceptions and ConnectionRefused, SocketException due to too
* many open files
*
* @throws FlumeSpecException
*/
@Test
public void testTooManyOpens() throws IOException, FlumeSpecException {
Benchmark b = new Benchmark("connection exhaust");
EventSource src = FlumeBuilder.buildSource("thrift(31337)");
EventSink snk = FlumeBuilder.buildSink("thrift(\"0.0.0.0\",31337)");
src.open();
// iterate until an exception is thrown
int i = 0;
try {
for (i = 0; true; i++) {
snk.open();
System.out.println(i + " connections...");
}
} catch (IOException io) {
System.out.println(io);
b.mark("conns", i);
}
src.close();
b.done();
}
@Test
public void testSurviveManyOpens() throws IOException, FlumeSpecException {
Benchmark b = new Benchmark("connection exhaust");
EventSource src = FlumeBuilder.buildSource("thrift(31337)");
src.open();
// iterate until an exception is thrown
for (int i = 0; i < 10000; i++) { // previous fails at 1000, make sure ok at
// an order of magnitude bigger.
EventSink snk = FlumeBuilder.buildSink("thrift(\"0.0.0.0\",31337)");
snk.open();
System.out.println(i + " connections...");
snk.close();
}
src.close();
b.done();
}
}