@@ -58,7 +58,7 @@ public class Container {
   public void stop(Duration timeout) {
     Objects.requireNonNull(timeout);
 
-    LOG.info("Stopping " + getId());
+    LOG.warning("Stopping " + getId());
 
     String seconds = String.valueOf(timeout.toMillis() / 1000);
 
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// distributed with this work for additional information
// regarding copyright ownership.  The SFC 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
//
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// software distributed under the License is distributed on an
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package org.openqa.selenium.docker;

import org.openqa.selenium.WebDriverException;
import org.openqa.selenium.remote.http.Contents;
import org.openqa.selenium.remote.http.HttpHandler;
import org.openqa.selenium.remote.http.HttpRequest;
import org.openqa.selenium.remote.http.HttpResponse;

import java.time.Duration;
import java.util.Objects;
import java.util.logging.Logger;

import static java.net.HttpURLConnection.HTTP_OK;
import static org.openqa.selenium.remote.http.HttpMethod.DELETE;
import static org.openqa.selenium.remote.http.HttpMethod.POST;

public class Container {

  public static final Logger LOG = Logger.getLogger(Container.class.getName());
  private final HttpHandler client;
  private final ContainerId id;

  public Container(HttpHandler client, ContainerId id) {
    LOG.info("Created container " + id);
    this.client = Objects.requireNonNull(client);
    this.id = Objects.requireNonNull(id);
  }

  public ContainerId getId() {
    return id;
  }

  public void start() {
    LOG.info("Starting " + getId());
    HttpResponse res = client.execute(new HttpRequest(POST, String.format("/containers/%s/start", id)));
    if (!res.isSuccessful()) {
      throw new WebDriverException("Unable to start container: " + Contents.string(res));
    }
  }

  public void stop(Duration timeout) {
    Objects.requireNonNull(timeout);

    LOG.info("Stopping " + getId());

    String seconds = String.valueOf(timeout.toMillis() / 1000);

    HttpRequest request = new HttpRequest(POST, String.format("/containers/%s/stop", id))
      .addQueryParameter("t", seconds);

    HttpResponse res = client.execute(request);
    if (!res.isSuccessful()) {
      throw new WebDriverException("Unable to stop container: " + Contents.string(res));
    }
  }

  public void delete() {
    LOG.info("Removing " + getId());

    HttpResponse res = client.execute(new HttpRequest(DELETE, "/containers/" + id));
    if (res.getStatus() != HTTP_OK) {
      LOG.warning("Unable to delete container");
    }
  }
}

It's not a warning. It's an informational message.