content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF 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 org.apache.cassandra.distributed.test.streaming;
  
  import java.io.IOException;
  import java.util.concurrent.Callable;
  
  import org.junit.Test;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import net.bytebuddy.ByteBuddy;
  import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
  import net.bytebuddy.implementation.MethodDelegation;
  import net.bytebuddy.implementation.bind.annotation.SuperCall;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.Feature;
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.distributed.test.TestBaseImpl;
  import org.apache.cassandra.streaming.StreamSession;
  import org.apache.cassandra.streaming.messages.IncomingStreamMessage;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  import static org.apache.cassandra.streaming.messages.StreamMessage.Type.STREAM;
  import static org.junit.Assert.assertFalse;
  
  /** Demonstrate deadlock if the netty event loop thread calls StreamSession.closeSession while
   *  the object monitor is being held by another thread.
  */
  public class StreamDisconnectedWhileReceivingTest extends TestBaseImpl
  {
      static final Logger logger = LoggerFactory.getLogger(StreamDisconnectedWhileReceivingTest.class);
  
      @Test
      public void zeroCopy() throws IOException, InterruptedException
      {
          disconnectControlChannel(true);
      }
  
      @Test
      public void notZeroCopy() throws IOException, InterruptedException
      {
          disconnectControlChannel(false);
      }
  
      private void disconnectControlChannel(boolean zeroCopyStreaming) throws IOException, InterruptedException
      {
          try (Cluster cluster = Cluster.build(2)
                                        .withInstanceInitializer(BBHelper::install)
                                        .withConfig(c -> c.with(Feature.values())
                                                          .set("stream_entire_sstables", zeroCopyStreaming)
                                                          .set("autocompaction_on_startup_enabled", false))
                                        .start())
          {
              init(cluster);
  
              cluster.schemaChange(withKeyspace("CREATE TABLE %s.tbl (pk int PRIMARY KEY)"));
              IInvokableInstance node1 = cluster.get(1);
              IInvokableInstance node2 = cluster.get(2);
  
              for (int i = 1; i <= 100; i++)
                  node1.executeInternal(withKeyspace("INSERT INTO %s.tbl (pk) VALUES (?)"), i);
              node1.flush(KEYSPACE);
              Thread nodetoolRepair = new Thread(() -> {
                  node2.nodetoolResult("repair", "-full", KEYSPACE, "tbl");
              });
              nodetoolRepair.start();
  
              nodetoolRepair.join(15000);
              assertFalse("Repair did not complete - assuming deadlock", nodetoolRepair.isAlive());
  
              // if deadlock occurs, instance shutdown will hit timeout.
          }
      }
  
      public static class BBHelper
      {
          static Logger logger = LoggerFactory.getLogger(BBHelper.class);
  
          public static void receive(IncomingStreamMessage message, @SuperCall Callable<Void> zuper) throws Throwable
          {
              logger.info("receive message {}", message.type);
              if (message.type == STREAM)
                  message.stream.session().getChannel().unsafeCloseControlChannel();
              zuper.call();
          }
  
          public static void install(ClassLoader classLoader, Integer num)
          {
              if (num != 2) // only target the second instance
                  return;
  
              new ByteBuddy().rebase(StreamSession.class)
                             .method(named("receive").and(takesArguments(1)))
                             .intercept(MethodDelegation.to(BBHelper.class))
                             .make()
                             .load(classLoader, ClassLoadingStrategy.Default.INJECTION);
          }
      }
  }
  