HDFS-17621. Make PathIsNotEmptyDirectoryException terse (#7036). Contributed by dzcxzl.

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java

@@ -56,6 +56,7 @@ import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.PathIsNotEmptyDirectoryException;
 import org.apache.hadoop.hdfs.HAUtil;
 import org.apache.hadoop.hdfs.protocol.UnresolvedPathException;
 import org.apache.hadoop.thirdparty.com.google.common.cache.CacheBuilder;
@@ -368,7 +369,8 @@ public class RouterRpcServer extends AbstractService implements ClientProtocol,
         NotReplicatedYetException.class,
         IOException.class,
         ConnectException.class,
-        RetriableException.class);
+        RetriableException.class,
+        PathIsNotEmptyDirectoryException.class);
 
     this.rpcServer.addSuppressedLoggingExceptions(
         StandbyException.class, UnresolvedPathException.class);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java

@@ -54,6 +54,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.ReconfigurationTaskStatus;
 import org.apache.hadoop.crypto.CryptoProtocolVersion;
 import org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries;
+import org.apache.hadoop.fs.PathIsNotEmptyDirectoryException;
 import org.apache.hadoop.hdfs.AddBlockFlag;
 import org.apache.hadoop.fs.CacheFlag;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
@@ -541,7 +542,8 @@ public class NameNodeRpcServer implements NamenodeProtocols {
         FSLimitException.PathComponentTooLongException.class,
         FSLimitException.MaxDirectoryItemsExceededException.class,
         DisallowedDatanodeException.class,
-        XAttrNotFoundException.class);
+        XAttrNotFoundException.class,
+        PathIsNotEmptyDirectoryException.class);
 
     clientRpcServer.addSuppressedLoggingExceptions(StandbyException.class,
         UnresolvedPathException.class);