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   * 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,
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.distributed.test.ring;
  
  import java.util.concurrent.Callable;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.junit.Test;
  
  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.cql3.statements.schema.CreateKeyspaceStatement;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.distributed.test.log.FuzzTestBase;
  import org.apache.cassandra.schema.Keyspaces;
  import org.apache.cassandra.tcm.ClusterMetadata;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  public class StopProcessingExceptionTest extends FuzzTestBase
  {
      @Test
      public void stopProcessingExceptionTest() throws Throwable
      {
          try (Cluster cluster = builder().withNodes(2)
                                          .withInstanceInitializer(BBFailHelper::install)
                                          .start())
          {
              long mark = cluster.get(2).logs().mark();
              cluster.get(2).runOnInstance(() -> BBFailHelper.enabled.set(true));
              cluster.coordinator(1).execute("CREATE KEYSPACE ks WITH replication = {'class': 'SimpleStrategy', 'replication_factor' : 2};",
                                             ConsistencyLevel.ALL);
              cluster.get(2).logs().watchFor(mark, "All subsequent epochs will be ignored");
          }
      }
  
      public static class BBFailHelper
      {
          static void install(ClassLoader cl, int nodeNumber)
          {
              if (nodeNumber == 2)
                  new ByteBuddy().rebase(CreateKeyspaceStatement.class)
                                 .method(named("apply"))
                                 .intercept(MethodDelegation.to(BBFailHelper.class))
                                 .make()
                                 .load(cl, ClassLoadingStrategy.Default.INJECTION);
          }
  
          public static AtomicBoolean enabled = new AtomicBoolean(false);
  
          public static Keyspaces apply(ClusterMetadata metadata, @SuperCall Callable<Keyspaces> zuper) throws Exception
          {
              if (enabled.get())
                  throw new RuntimeException();
  
              return zuper.call();
          }
      }
  }
  