import org.apache.hadoop.hdfs.server.protocol.RemoteEditLog;
import org.apache.hadoop.hdfs.util.DataTransferThrottler;
import org.apache.hadoop.hdfs.util.MD5FileUtils;
import org.apache.hadoop.io.MD5Hash;
import org.apache.hadoop.security.UserGroupInformation;
<BUG>import org.apache.hadoop.util.StringUtils;
import com.google.common.base.Preconditions;</BUG>
@InterfaceAudience.Private
public class GetImageServlet extends HttpServlet {
private static final long serialVersionUID = -7669068179452648952L;

import org.apache.hadoop.hdfs.server.protocol.RemoteEditLog;
import org.apache.hadoop.hdfs.util.DataTransferThrottler;
import org.apache.hadoop.hdfs.util.MD5FileUtils;
import org.apache.hadoop.io.MD5Hash;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.StringUtils;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
@InterfaceAudience.Private
public class GetImageServlet extends HttpServlet {
private static final long serialVersionUID = -7669068179452648952L;
