3 files changed, 33 insertions, 10 deletions
diff --git a/other/java/hdfs3/dependency-reduced-pom.xml b/other/java/hdfs3/dependency-reduced-pom.xml
index 00e236aa2..51c4a4473 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>1.3.6</seaweedfs.client.version>
+    <seaweedfs.client.version>1.3.8</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 a03068a48..cf7a6a632 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>1.3.6</seaweedfs.client.version>
+        <seaweedfs.client.version>1.3.8</seaweedfs.client.version>
         <hadoop.version>3.1.1</hadoop.version>
     </properties>
 
@@ -31,8 +31,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>7</source>
-                    <target>7</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
             <plugin>
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 9ea26776b..d5c8ae521 100644
--- a/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java
+++ b/other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedOutputStream.java
@@ -216,12 +216,35 @@ public class SeaweedOutputStream extends OutputStream implements Syncable, Strea
             return;
         }
 
-        buffer.flip();
-        int bytesLength = buffer.limit() - buffer.position();
-        SeaweedWrite.writeData(entry, replication, filerGrpcClient, position, buffer.array(), buffer.position(), buffer.limit());
-        // System.out.println(path + " saved [" + (position) + "," + ((position) + bytesLength) + ")");
-        position += bytesLength;
-        buffer.clear();
+        position += submitWriteBufferToService(buffer, position);
+
+        buffer = ByteBufferPool.request(bufferSize);
+
+    }
+
+    private synchronized int submitWriteBufferToService(final ByteBuffer bufferToWrite, final long writePosition) throws IOException {
+
+        bufferToWrite.flip();
+        int bytesLength = bufferToWrite.limit() - bufferToWrite.position();
+
+        if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount * 2) {
+            waitForTaskToComplete();
+        }
+        final Future<Void> job = completionService.submit(() -> {
+            System.out.println(path + " is going to save [" + (writePosition) + "," + ((writePosition) + bytesLength) + ")");
+            SeaweedWrite.writeData(entry, replication, filerGrpcClient, writePosition, bufferToWrite.array(), bufferToWrite.position(), bufferToWrite.limit());
+            System.out.println(path + " saved [" + (writePosition) + "," + ((writePosition) + bytesLength) + ")");
+            bufferToWrite.clear();
+            ByteBufferPool.release(bufferToWrite);
+            return null;
+        });
+
+        writeOperations.add(new WriteOperation(job, writePosition, bytesLength));
+
+        // Try to shrink the queue
+        shrinkWriteOperationQueue();
+
+        return bytesLength;
 
     }