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;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.nio.charset.StandardCharsets;
  import java.util.List;
  
  import org.junit.Test;
  
  import com.datastax.driver.core.ProtocolVersion;
  import com.datastax.driver.core.ResultSet;
  import com.datastax.driver.core.Session;
  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.shared.WithProperties;
  import org.assertj.core.api.Assertions;
  
  import static org.apache.cassandra.config.CassandraRelevantProperties.IO_NETTY_EVENTLOOP_THREADS;
  
  public class NativeMixedVersionTest extends TestBaseImpl
  {
      @Test
      public void v4ConnectionCleansUpThreadLocalState() throws IOException
      {
          // make sure to limit the netty thread pool to size 1, this will make the test determanistic as all work
          // will happen on the single thread.
          try (WithProperties properties = new WithProperties().set(IO_NETTY_EVENTLOOP_THREADS, 1);
               Cluster cluster = Cluster.build(1)
                                        .withConfig(c ->
                                                    c.with(Feature.values())
                                                     .set("read_thresholds_enabled", true)
                                                     .set("local_read_size_warn_threshold", "1KiB")
                                        )
                                        .start();
               )
          {
  
              init(cluster);
              cluster.schemaChange(withKeyspace("CREATE TABLE %s.tbl (pk int, ck1 int, value blob, PRIMARY KEY (pk, ck1))"));
              IInvokableInstance node = cluster.get(1);
  
              ByteBuffer blob = ByteBuffer.wrap("This is just some large string to get some number of bytes".getBytes(StandardCharsets.UTF_8));
  
              for (int i = 0; i < 100; i++)
                  node.executeInternal(withKeyspace("INSERT INTO %s.tbl (pk, ck1, value) VALUES (?, ?, ?)"), 0, i, blob);
  
              // v4+ process STARTUP message on the netty thread.  To make sure we do not leak the ClientWarn state,
              // make sure a warning will be generated by a query then run on the same threads on the v3 protocol (which
              // does not support warnings)
              try (com.datastax.driver.core.Cluster driver = JavaDriverUtils.create(cluster, ProtocolVersion.V5);
                   Session session = driver.connect())
              {
                  ResultSet rs = session.execute(withKeyspace("SELECT * FROM %s.tbl"));
                  Assertions.assertThat(rs.getExecutionInfo().getWarnings()).isNotEmpty();
              }
  
              try (com.datastax.driver.core.Cluster driver = JavaDriverUtils.create(cluster, ProtocolVersion.V3);
                   Session session = driver.connect())
              {
                  ResultSet rs = session.execute(withKeyspace("SELECT * FROM %s.tbl"));
                  Assertions.assertThat(rs.getExecutionInfo().getWarnings()).isEmpty();
              }
  
              // this should not happen; so make sure no logs are found
              List<String> result = node.logs().grep("Warnings present in message with version less than").getResult();
              Assertions.assertThat(result).isEmpty();
          }
      }
  }
  