diff --git a/lakesoul-common/src/main/java/com/dmetasoul/lakesoul/meta/jnr/JnrLoader.java b/lakesoul-common/src/main/java/com/dmetasoul/lakesoul/meta/jnr/JnrLoader.java
index 0e824dfd6..ee6905928 100644
--- a/lakesoul-common/src/main/java/com/dmetasoul/lakesoul/meta/jnr/JnrLoader.java
+++ b/lakesoul-common/src/main/java/com/dmetasoul/lakesoul/meta/jnr/JnrLoader.java
@@ -8,8 +8,9 @@
 
 import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.IOException;
 import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
 import java.util.HashMap;
@@ -37,20 +38,27 @@ public synchronized static void tryLoad() {
 
         String finalPath = null;
 
-        if (JnrLoader.class.getClassLoader().getResource(libName) != null) {
-            try {
-                File temp = File.createTempFile(libName + "_", ".tmp", new File(System.getProperty("java.io.tmpdir")));
-                temp.deleteOnExit();
-                try (final InputStream is = JnrLoader.class.getClassLoader().getResourceAsStream(libName)) {
+        try {
+            URL url = JnrLoader.class.getClassLoader().getResource(libName);
+            if (url == null) {
+                throw new FileNotFoundException(libName);
+            }
+            URLConnection connection = url.openConnection();
+            if (connection != null) {
+                connection.setUseCaches(false);
+                try (final InputStream is = connection.getInputStream()) {
                     if (is == null) {
                         throw new FileNotFoundException(libName);
                     }
+                    File temp = File.createTempFile(libName + "_", ".tmp", new File(System.getProperty("java.io.tmpdir")));
+                    temp.deleteOnExit();
                     Files.copy(is, temp.toPath(), StandardCopyOption.REPLACE_EXISTING);
                     finalPath = temp.getAbsolutePath();
                 }
-            } catch (IOException e) {
-                throw new IllegalStateException("error loading native libraries: " + e);
             }
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalStateException("error loading native libraries: " + e);
         }
 
         if (finalPath != null) {
diff --git a/lakesoul-flink/src/main/java/org/apache/flink/lakesoul/source/LakeSoulAllPartitionDynamicSplitEnumerator.java b/lakesoul-flink/src/main/java/org/apache/flink/lakesoul/source/LakeSoulAllPartitionDynamicSplitEnumerator.java
index 3bfbd7417..883f58c6a 100644
--- a/lakesoul-flink/src/main/java/org/apache/flink/lakesoul/source/LakeSoulAllPartitionDynamicSplitEnumerator.java
+++ b/lakesoul-flink/src/main/java/org/apache/flink/lakesoul/source/LakeSoulAllPartitionDynamicSplitEnumerator.java
@@ -76,13 +76,15 @@ public void start() {
     @Override
     public synchronized void handleSplitRequest(int subtaskId, @Nullable String requesterHostname) {
         LOG.info("handleSplitRequest subTaskId {}, oid {}, tid {}",
-                System.identityHashCode(this),
-                subtaskId, Thread.currentThread().getId());
+                subtaskId, System.identityHashCode(this), Thread.currentThread().getId());
         if (!context.registeredReaders().containsKey(subtaskId)) {
             // reader failed between sending the request and now. skip this request.
             return;
         }
         int tasksSize = context.registeredReaders().size();
+        if (tasksSize == 0) {
+            return;
+        }
         Optional<LakeSoulPartitionSplit> nextSplit = this.splitAssigner.getNext(subtaskId, tasksSize);
         if (nextSplit.isPresent()) {
             context.assignSplit(nextSplit.get(), subtaskId);
@@ -128,14 +130,21 @@ private synchronized void processDiscoveredSplits(
             LOG.error("Failed to enumerate files", error);
             return;
         }
-        LOG.info("Process discovered splits {}, oid {}, tid {}", splits,
-                System.identityHashCode(this),
-                Thread.currentThread().getId());
         int tasksSize = context.registeredReaders().size();
+        LOG.info("Process discovered splits {}, taskSize {}, oid {}, tid {}", splits,
+                tasksSize, System.identityHashCode(this),
+                Thread.currentThread().getId());
+        if (tasksSize == 0) {
+            return;
+        }
         this.splitAssigner.addSplits(splits);
         Iterator<Integer> iter = taskIdsAwaitingSplit.iterator();
         while (iter.hasNext()) {
             int taskId = iter.next();
+            if (!context.registeredReaders().containsKey(taskId)) {
+                iter.remove();
+                continue;
+            }
             Optional<LakeSoulPartitionSplit> al = this.splitAssigner.getNext(taskId, tasksSize);
             if (al.isPresent()) {
                 context.assignSplit(al.get(), taskId);
diff --git a/native-io/lakesoul-io-java/src/main/java/com/dmetasoul/lakesoul/lakesoul/io/jnr/JnrLoader.java b/native-io/lakesoul-io-java/src/main/java/com/dmetasoul/lakesoul/lakesoul/io/jnr/JnrLoader.java
index b0ceec099..c8032f63a 100644
--- a/native-io/lakesoul-io-java/src/main/java/com/dmetasoul/lakesoul/lakesoul/io/jnr/JnrLoader.java
+++ b/native-io/lakesoul-io-java/src/main/java/com/dmetasoul/lakesoul/lakesoul/io/jnr/JnrLoader.java
@@ -9,8 +9,9 @@
 
 import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.IOException;
 import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
 import java.util.HashMap;
@@ -38,20 +39,27 @@ public synchronized static void tryLoad() {
 
         String finalPath = null;
 
-        if (JnrLoader.class.getClassLoader().getResource(libName) != null) {
-            try {
-                File temp = File.createTempFile(libName + "_", ".tmp", new File(System.getProperty("java.io.tmpdir")));
-                temp.deleteOnExit();
-                try (final InputStream is = JnrLoader.class.getClassLoader().getResourceAsStream(libName)) {
+        try {
+            URL url = JnrLoader.class.getClassLoader().getResource(libName);
+            if (url == null) {
+                throw new FileNotFoundException(libName);
+            }
+            URLConnection connection = url.openConnection();
+            if (connection != null) {
+                connection.setUseCaches(false);
+                try (final InputStream is = connection.getInputStream()) {
                     if (is == null) {
                         throw new FileNotFoundException(libName);
                     }
+                    File temp = File.createTempFile(libName + "_", ".tmp", new File(System.getProperty("java.io.tmpdir")));
+                    temp.deleteOnExit();
                     Files.copy(is, temp.toPath(), StandardCopyOption.REPLACE_EXISTING);
                     finalPath = temp.getAbsolutePath();
                 }
-            } catch (IOException e) {
-                throw new IllegalStateException("error loading native libraries: " + e);
             }
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new IllegalStateException("error loading native libraries: " + e);
         }
 
         if (finalPath != null) {