diff --git a/src/main/java/com/fanruan/fs/s3/repository/core/S3Config.java b/src/main/java/com/fanruan/fs/s3/repository/core/S3Config.java
index 5821864..976a9b8 100644
--- a/src/main/java/com/fanruan/fs/s3/repository/core/S3Config.java
+++ b/src/main/java/com/fanruan/fs/s3/repository/core/S3Config.java
@@ -38,6 +38,9 @@ public class S3Config extends CommonRepoConfig {
     @Identifier("signerOverride")
     private Conf<String> signerOverride = HolderKit.simple(StringUtils.EMPTY);
 
+    @Identifier("maxConnections")
+    private Conf<Integer> maxConnections = HolderKit.simple(200);
+
     @GetConfig("endPoint")
     public String getEndPoint() {
         return endPoint.get();
@@ -98,6 +101,16 @@ public class S3Config extends CommonRepoConfig {
         this.signerOverride.set(signerOverride);
     }
 
+    @GetConfig("maxConnections")
+    public int getMaxConnections() {
+        return maxConnections.get();
+    }
+
+    @SetConfig("maxConnections")
+    public void setMaxConnections(int maxConnections) {
+        this.maxConnections.set(maxConnections);
+    }
+
     @Override
     public void update(String key) {
         super.update(key);
@@ -109,6 +122,7 @@ public class S3Config extends CommonRepoConfig {
             this.setBucket(newConfig.getBucket());
             this.setEnablePathStyleAccess(newConfig.isEnablePathStyleAccess());
             this.setSignerOverride(newConfig.getSignerOverride());
+            this.setMaxConnections(newConfig.getMaxConnections());
         }
     }
 
@@ -121,6 +135,7 @@ public class S3Config extends CommonRepoConfig {
         cloned.bucket = (Conf<String>) bucket.clone();
         cloned.enablePathStyleAccess = (Conf<Boolean>) enablePathStyleAccess.clone();
         cloned.signerOverride = (Conf<String>) signerOverride.clone();
+        cloned.maxConnections = (Conf<Integer>) maxConnections.clone();
         return cloned;
     }
 }
diff --git a/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java b/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
index 4cb90ec..0f7b77a 100644
--- a/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
+++ b/src/main/java/com/fanruan/fs/s3/repository/core/S3ResourceRepository.java
@@ -15,12 +15,14 @@ import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.PutObjectRequest;
 import com.amazonaws.services.s3.model.S3Object;
 import com.amazonaws.services.s3.model.S3ObjectSummary;
+import com.amazonaws.util.IOUtils;
 import com.fanruan.api.log.LogKit;
 import com.fanruan.api.util.StringKit;
 import com.fr.io.repository.FineFileEntry;
 import com.fr.io.repository.base.BaseResourceRepository;
 import com.fr.stable.Filter;
 import com.fr.stable.StringUtils;
+import com.fr.third.org.apache.commons.io.output.NullOutputStream;
 import com.fr.workspace.resource.ResourceIOException;
 
 import java.io.ByteArrayInputStream;
@@ -57,6 +59,8 @@ public class S3ResourceRepository extends BaseResourceRepository {
             amazonS3ClientBuilder = amazonS3ClientBuilder.enablePathStyleAccess();
         }
         ClientConfiguration clientConfiguration = new ClientConfiguration();
+        clientConfiguration.setMaxConnections(config.getMaxConnections());
+        LogKit.info("Max connections is {}!", clientConfiguration.getMaxConnections());
         if (StringUtils.isNotEmpty(config.getSignerOverride())) {
             clientConfiguration.setSignerOverride(config.getSignerOverride());
         }
@@ -128,6 +132,8 @@ public class S3ResourceRepository extends BaseResourceRepository {
         try {
             return s3.getObject(request).getObjectContent();
         } catch (Exception e) {
+            LogKit.error("[S3] Failed to read file {}", filePath);
+            LogKit.error(e.getMessage(), e);
             return new ByteArrayInputStream(new byte[0]);
         }
     }
@@ -341,6 +347,8 @@ public class S3ResourceRepository extends BaseResourceRepository {
             S3Object s3Object = s3.getObject(bucket, path);
             if (s3Object != null) {
                 try {
+                    //s3Object要全部读完，否则会有警告
+                    IOUtils.copy(s3Object.getObjectContent(), new NullOutputStream());
                     return s3Object.getObjectMetadata().getLastModified().getTime();
                 } finally {
                     s3Object.close();