HDDS-1555. Checkstyle fix.

Author: swagle

hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientRatis.java

@@ -18,55 +18,54 @@
 
 package org.apache.hadoop.hdds.scm;
 
-import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.Preconditions;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.List;
+import java.util.Objects;
+import java.util.OptionalLong;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.stream.Collectors;
 
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdds.HddsUtils;
 import org.apache.hadoop.hdds.protocol.DatanodeDetails;
 import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ContainerCommandRequestProto;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ContainerCommandResponseProto;
+import org.apache.hadoop.hdds.protocol.proto.HddsProtos;
+import org.apache.hadoop.hdds.scm.client.HddsClientUtils;
+import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
 import org.apache.hadoop.hdds.security.x509.SecurityConfig;
-
-import io.opentracing.Scope;
-import io.opentracing.util.GlobalTracer;
+import org.apache.hadoop.hdds.tracing.TracingUtil;
 import org.apache.hadoop.util.Time;
+import org.apache.ratis.RatisHelper;
+import org.apache.ratis.client.RaftClient;
 import org.apache.ratis.grpc.GrpcTlsConfig;
 import org.apache.ratis.proto.RaftProtos;
 import org.apache.ratis.protocol.GroupMismatchException;
+import org.apache.ratis.protocol.RaftClientReply;
 import org.apache.ratis.protocol.RaftException;
-import org.apache.ratis.protocol.RaftRetryFailureException;
 import org.apache.ratis.retry.RetryPolicy;
-import org.apache.ratis.thirdparty.com.google.protobuf
-    .InvalidProtocolBufferException;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdds.scm.client.HddsClientUtils;
-import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
-import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
-    .ContainerCommandRequestProto;
-import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
-    .ContainerCommandResponseProto;
-import org.apache.hadoop.hdds.protocol.proto.HddsProtos;
-import org.apache.hadoop.hdds.tracing.TracingUtil;
-
-import org.apache.ratis.RatisHelper;
-import org.apache.ratis.client.RaftClient;
-import org.apache.ratis.protocol.RaftClientReply;
 import org.apache.ratis.rpc.RpcType;
 import org.apache.ratis.rpc.SupportedRpcType;
 import org.apache.ratis.thirdparty.com.google.protobuf.ByteString;
+import org.apache.ratis.thirdparty.com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.ratis.util.TimeDuration;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.IOException;
-import java.util.*;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.CompletionException;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeoutException;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.stream.Collectors;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Preconditions;
+
+import io.opentracing.Scope;
+import io.opentracing.util.GlobalTracer;
 
 /**
  * An abstract implementation of {@link XceiverClientSpi} using Ratis.