diff --git a/other/java/client/pom.xml b/other/java/client/pom.xml
index d35415a9d..8cf72c02c 100644
--- a/other/java/client/pom.xml
+++ b/other/java/client/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.github.chrislusf</groupId>
     <artifactId>seaweedfs-client</artifactId>
-    <version>1.3.3</version>
+    <version>1.3.4</version>
 
     <parent>
         <groupId>org.sonatype.oss</groupId>
diff --git a/other/java/client/pom.xml.deploy b/other/java/client/pom.xml.deploy
index d35415a9d..8cf72c02c 100644
--- a/other/java/client/pom.xml.deploy
+++ b/other/java/client/pom.xml.deploy
@@ -5,7 +5,7 @@
 
     <groupId>com.github.chrislusf</groupId>
     <artifactId>seaweedfs-client</artifactId>
-    <version>1.3.3</version>
+    <version>1.3.4</version>
 
     <parent>
         <groupId>org.sonatype.oss</groupId>
diff --git a/other/java/client/pom_debug.xml b/other/java/client/pom_debug.xml
index 1a8638fa8..c9a8247c4 100644
--- a/other/java/client/pom_debug.xml
+++ b/other/java/client/pom_debug.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.github.chrislusf</groupId>
     <artifactId>seaweedfs-client</artifactId>
-    <version>1.3.3</version>
+    <version>1.3.4</version>
 
     <parent>
         <groupId>org.sonatype.oss</groupId>
diff --git a/other/java/client/src/main/java/seaweedfs/client/ChunkCache.java b/other/java/client/src/main/java/seaweedfs/client/ChunkCache.java
index 3a33224b8..58870d742 100644
--- a/other/java/client/src/main/java/seaweedfs/client/ChunkCache.java
+++ b/other/java/client/src/main/java/seaweedfs/client/ChunkCache.java
@@ -7,7 +7,7 @@ import java.util.concurrent.TimeUnit;
 
 public class ChunkCache {
 
-    private final Cache<String, byte[]> cache;
+    private Cache<String, byte[]> cache = null;
 
     public ChunkCache(int maxEntries) {
         if (maxEntries == 0) {
diff --git a/other/java/hdfs2/dependency-reduced-pom.xml b/other/java/hdfs2/dependency-reduced-pom.xml
index 61c00463f..64de808c4 100644
--- a/other/java/hdfs2/dependency-reduced-pom.xml
+++ b/other/java/hdfs2/dependency-reduced-pom.xml
@@ -127,7 +127,7 @@
     </snapshotRepository>
   </distributionManagement>
   <properties>
-    <seaweedfs.client.version>1.3.3</seaweedfs.client.version>
+    <seaweedfs.client.version>1.3.4</seaweedfs.client.version>
     <hadoop.version>2.9.2</hadoop.version>
   </properties>
 </project>
diff --git a/other/java/hdfs2/pom.xml b/other/java/hdfs2/pom.xml
index b67ce1efe..8bbd31f29 100644
--- a/other/java/hdfs2/pom.xml
+++ b/other/java/hdfs2/pom.xml
@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <properties>
-        <seaweedfs.client.version>1.3.3</seaweedfs.client.version>
+        <seaweedfs.client.version>1.3.4</seaweedfs.client.version>
         <hadoop.version>2.9.2</hadoop.version>
     </properties>
 
diff --git a/other/java/hdfs3/dependency-reduced-pom.xml b/other/java/hdfs3/dependency-reduced-pom.xml
index 77f4688f8..a60b0c575 100644
--- a/other/java/hdfs3/dependency-reduced-pom.xml
+++ b/other/java/hdfs3/dependency-reduced-pom.xml
@@ -127,7 +127,7 @@
     </snapshotRepository>
   </distributionManagement>
   <properties>
-    <seaweedfs.client.version>1.3.3</seaweedfs.client.version>
+    <seaweedfs.client.version>1.3.4</seaweedfs.client.version>
     <hadoop.version>3.1.1</hadoop.version>
   </properties>
 </project>
diff --git a/other/java/hdfs3/pom.xml b/other/java/hdfs3/pom.xml
index cef029c2d..b55d2ac84 100644
--- a/other/java/hdfs3/pom.xml
+++ b/other/java/hdfs3/pom.xml
@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <properties>
-        <seaweedfs.client.version>1.3.3</seaweedfs.client.version>
+        <seaweedfs.client.version>1.3.4</seaweedfs.client.version>
         <hadoop.version>3.1.1</hadoop.version>
     </properties>
 
diff --git a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java
index 0dd094b55..3e0e89417 100644
--- a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java
+++ b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java
@@ -17,6 +17,7 @@ import java.io.IOException;
 import java.io.InterruptedIOException;
 import java.io.OutputStream;
 import java.util.Arrays;
+import java.util.Locale;
 import java.util.concurrent.*;
 
 import static seaweed.hdfs.SeaweedFileSystemStore.getParentDirectory;
@@ -108,7 +109,7 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
             // ensureCapacity
             if (numberOfBytesToWrite > buffer.length - bufferIndex) {
                 int capacity = buffer.length;
-                while(capacity-bufferIndex<numberOfBytesToWrite){
+                while (capacity - bufferIndex < numberOfBytesToWrite) {
                     capacity = capacity << 1;
                 }
                 if (capacity < 0) {