diff --git a/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java b/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
index 07ccd0a..9787a9a 100644
--- a/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
+++ b/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
@@ -8,6 +8,9 @@ import com.sunyard.sge.pool.ThreadBasedConnectPool;
 import org.apache.logging.log4j.Logger;
 import racal.sunyard.main.SydApi4j;
 
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
 public class SydApiPool extends ThreadBasedConnectPool<SydApi> {
     static {
         SydApi.SYD_SetLogConfig("./logs/", 0);
@@ -56,25 +59,28 @@ public class SydApiPool extends ThreadBasedConnectPool<SydApi> {
 
     // 保活接口
     protected boolean check(SydApi4Database o) {
-        if (null==o) {
-            return false;
-        }
+//        if (null == o) {
+//            return false;
+//        }
+        Lock l = new ReentrantLock();
+        l.lock();
         SydApi4j[] hsms = o.getHsms();
-        for (SydApi4j hsm : hsms) {
-            if ( null != hsm ) {
+        l.unlock();
+        boolean ifBoolean = false;
+        int length = hsms.length;
+        for (int i = 0; i < length; i++) {
+            if (null != hsms[i]) {
                 try {
-                    o.SYD_SM3_Hash_ShortData( new byte[8] );
-                    return true;
-
-                }catch ( Exception e) {
+                    o.SYD_SM3_Hash_ShortData(new byte[8]);
+                    ifBoolean = true;
+                } catch (Exception e) {
                     // 忽略
-                    return false;
+                    hsms[i] = null;
                 }
             }
         }
-        return false;
+        return ifBoolean;
     }
-
     // 释放
     protected void free(SydApi o) {
         if ( null != o ) {
diff --git a/src/main/java/com/sunyard/sge/pool/ThreadBasedConnectPool.java b/src/main/java/com/sunyard/sge/pool/ThreadBasedConnectPool.java
index 9f0d53f..08c07f6 100644
--- a/src/main/java/com/sunyard/sge/pool/ThreadBasedConnectPool.java
+++ b/src/main/java/com/sunyard/sge/pool/ThreadBasedConnectPool.java
@@ -30,7 +30,6 @@ public class ThreadBasedConnectPool<T> {
     private PoolConfig config;
 
     public ThreadBasedConnectPool(PoolConfig config) {
-        Lock l = new ReentrantLock();
         this.config = config;
         threadPool.scheduleAtFixedRate(new Runnable() {
             @Override
@@ -65,13 +64,11 @@ public class ThreadBasedConnectPool<T> {
 
                     boolean checkPass = false;
                     try {
-                        l.lock();
                         checkPass = check(entry.getValue().getObjectForCheck());
                     } catch (Exception e) {
                         checkPass = false;
                     }
                     finally {
-                        l.unlock();
                     }
 
                     if ( ! checkPass) {