diff --git a/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystem.java b/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystem.java
index 7cf76e5e8..d471d8440 100644
--- a/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystem.java
+++ b/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystem.java
@@ -1,14 +1,7 @@
 package seaweed.hdfs;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FSDataInputStream;
-import org.apache.hadoop.fs.FSDataOutputStream;
-import org.apache.hadoop.fs.FileAlreadyExistsException;
-import org.apache.hadoop.fs.FileStatus;
-import org.apache.hadoop.fs.ParentNotDirectoryException;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.UnsupportedFileSystemException;
-import org.apache.hadoop.fs.XAttrSetFlag;
+import org.apache.hadoop.fs.*;
 import org.apache.hadoop.fs.permission.AclEntry;
 import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsPermission;
@@ -87,6 +80,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
             InputStream inputStream = seaweedFileSystemStore.openFileForRead(path, statistics, bufferSize);
             return new FSDataInputStream(inputStream);
         } catch (Exception ex) {
+            LOG.warn("open path: {} bufferSize:{}", path, bufferSize, ex);
             return null;
         }
     }
@@ -104,10 +98,36 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
             OutputStream outputStream = seaweedFileSystemStore.createFile(path, overwrite, permission, bufferSize, replicaPlacement);
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
+            LOG.warn("create path: {} bufferSize:{} blockSize:{}", path, bufferSize, blockSize, ex);
             return null;
         }
     }
 
+    /**
+     * {@inheritDoc}
+     * @throws FileNotFoundException if the parent directory is not present -or
+     * is not a directory.
+     */
+    @Override
+    public FSDataOutputStream createNonRecursive(Path path,
+                                                 FsPermission permission,
+                                                 EnumSet<CreateFlag> flags,
+                                                 int bufferSize,
+                                                 short replication,
+                                                 long blockSize,
+                                                 Progressable progress) throws IOException {
+        Path parent = path.getParent();
+        if (parent != null) {
+            // expect this to raise an exception if there is no parent
+            if (!getFileStatus(parent).isDirectory()) {
+                throw new FileAlreadyExistsException("Not a directory: " + parent);
+            }
+        }
+        return create(path, permission,
+                flags.contains(CreateFlag.OVERWRITE), bufferSize,
+                replication, blockSize, progress);
+    }
+
     @Override
     public FSDataOutputStream append(Path path, int bufferSize, Progressable progressable) throws IOException {
 
@@ -118,6 +138,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
             OutputStream outputStream = seaweedFileSystemStore.createFile(path, false, null, bufferSize, "");
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
+            LOG.warn("append path: {} bufferSize:{}", path, bufferSize, ex);
             return null;
         }
     }
diff --git a/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java b/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
index 2ddcd41e8..826b74560 100644
--- a/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
+++ b/other/java/hdfs2/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
@@ -137,7 +137,7 @@ public class SeaweedFileSystemStore {
         if (source.isRoot()) {
             return;
         }
-        LOG.warn("rename lookupEntry source: {}", source);
+        LOG.warn("rename source: {} destination:{}", source, destination);
         FilerProto.Entry entry = lookupEntry(source);
         if (entry == null) {
             LOG.warn("rename non-existing source: {}", source);
@@ -171,10 +171,10 @@ public class SeaweedFileSystemStore {
                 entry = FilerProto.Entry.newBuilder();
                 entry.mergeFrom(existingEntry);
                 entry.getAttributesBuilder().setMtime(now);
+                LOG.debug("createFile merged entry path:{} entry:{} from:{}", path, entry, existingEntry);
+                writePosition = SeaweedRead.totalSize(existingEntry.getChunksList());
+                replication = existingEntry.getAttributes().getReplication();
             }
-            LOG.debug("createFile merged entry path:{} entry:{} from:{}", path, entry, existingEntry);
-            writePosition = SeaweedRead.totalSize(existingEntry.getChunksList());
-            replication = existingEntry.getAttributes().getReplication();
         }
         if (entry == null) {
             entry = FilerProto.Entry.newBuilder()
@@ -266,4 +266,5 @@ public class SeaweedFileSystemStore {
         filerClient.updateEntry(getParentDirectory(path), entryBuilder.build());
 
     }
+
 }
diff --git a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystem.java b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystem.java
index 7cf76e5e8..c12da8261 100644
--- a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystem.java
+++ b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystem.java
@@ -1,14 +1,7 @@
 package seaweed.hdfs;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FSDataInputStream;
-import org.apache.hadoop.fs.FSDataOutputStream;
-import org.apache.hadoop.fs.FileAlreadyExistsException;
-import org.apache.hadoop.fs.FileStatus;
-import org.apache.hadoop.fs.ParentNotDirectoryException;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.UnsupportedFileSystemException;
-import org.apache.hadoop.fs.XAttrSetFlag;
+import org.apache.hadoop.fs.*;
 import org.apache.hadoop.fs.permission.AclEntry;
 import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsPermission;
@@ -29,7 +22,7 @@ import java.util.Map;
 
 import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY;
 
-public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
+public class SeaweedFileSystem extends FileSystem {
 
     public static final int FS_SEAWEED_DEFAULT_PORT = 8888;
     public static final String FS_SEAWEED_FILER_HOST = "fs.seaweed.filer.host";
@@ -87,6 +80,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
             InputStream inputStream = seaweedFileSystemStore.openFileForRead(path, statistics, bufferSize);
             return new FSDataInputStream(inputStream);
         } catch (Exception ex) {
+            LOG.warn("open path: {} bufferSize:{}", path, bufferSize, ex);
             return null;
         }
     }
@@ -104,10 +98,36 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
             OutputStream outputStream = seaweedFileSystemStore.createFile(path, overwrite, permission, bufferSize, replicaPlacement);
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
+            LOG.warn("create path: {} bufferSize:{} blockSize:{}", path, bufferSize, blockSize, ex);
             return null;
         }
     }
 
+    /**
+     * {@inheritDoc}
+     * @throws FileNotFoundException if the parent directory is not present -or
+     * is not a directory.
+     */
+    @Override
+    public FSDataOutputStream createNonRecursive(Path path,
+                                                 FsPermission permission,
+                                                 EnumSet<CreateFlag> flags,
+                                                 int bufferSize,
+                                                 short replication,
+                                                 long blockSize,
+                                                 Progressable progress) throws IOException {
+        Path parent = path.getParent();
+        if (parent != null) {
+            // expect this to raise an exception if there is no parent
+            if (!getFileStatus(parent).isDirectory()) {
+                throw new FileAlreadyExistsException("Not a directory: " + parent);
+            }
+        }
+        return create(path, permission,
+                flags.contains(CreateFlag.OVERWRITE), bufferSize,
+                replication, blockSize, progress);
+    }
+
     @Override
     public FSDataOutputStream append(Path path, int bufferSize, Progressable progressable) throws IOException {
 
@@ -118,6 +138,7 @@ public class SeaweedFileSystem extends org.apache.hadoop.fs.FileSystem {
             OutputStream outputStream = seaweedFileSystemStore.createFile(path, false, null, bufferSize, "");
             return new FSDataOutputStream(outputStream, statistics);
         } catch (Exception ex) {
+            LOG.warn("append path: {} bufferSize:{}", path, bufferSize, ex);
             return null;
         }
     }
diff --git a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
index 2ddcd41e8..826b74560 100644
--- a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
+++ b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
@@ -137,7 +137,7 @@ public class SeaweedFileSystemStore {
         if (source.isRoot()) {
             return;
         }
-        LOG.warn("rename lookupEntry source: {}", source);
+        LOG.warn("rename source: {} destination:{}", source, destination);
         FilerProto.Entry entry = lookupEntry(source);
         if (entry == null) {
             LOG.warn("rename non-existing source: {}", source);
@@ -171,10 +171,10 @@ public class SeaweedFileSystemStore {
                 entry = FilerProto.Entry.newBuilder();
                 entry.mergeFrom(existingEntry);
                 entry.getAttributesBuilder().setMtime(now);
+                LOG.debug("createFile merged entry path:{} entry:{} from:{}", path, entry, existingEntry);
+                writePosition = SeaweedRead.totalSize(existingEntry.getChunksList());
+                replication = existingEntry.getAttributes().getReplication();
             }
-            LOG.debug("createFile merged entry path:{} entry:{} from:{}", path, entry, existingEntry);
-            writePosition = SeaweedRead.totalSize(existingEntry.getChunksList());
-            replication = existingEntry.getAttributes().getReplication();
         }
         if (entry == null) {
             entry = FilerProto.Entry.newBuilder()
@@ -266,4 +266,5 @@ public class SeaweedFileSystemStore {
         filerClient.updateEntry(getParentDirectory(path), entryBuilder.build());
 
     }
+
 }