diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb9cb195b..64dffac5a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## Change log
 
+### 9.0.9 (3/20/2024 - )
+
+* mysql: updated and patched to 8.3.0, fixed CJException should be wrapped as SQLException
+  > make sure use "core.framework.mysql:mysql-connector-j:8.3.0-r2"
+
 ### 9.0.8 (1/29/2024 - 3/7/2024)
 
 * kafka: update to 3.7.0
@@ -78,7 +83,7 @@ triggered VirtualThreads.park, make all other virtual threads which share same h
 * json: update jackson to 2.16.1
   > refer to https://cowtowncoder.medium.com/jackson-2-16-rc1-overview-55dbb90c22d9
 * mysql: updated and patched to 8.3.0
-  > use "core.framework.mysql:mysql-connector-j:8.3.0-r1"
+  > use "core.framework.mysql:mysql-connector-j:8.3.0-r2"
 * db: support azure IAM auth
   > azure mysql flexible server supports IAM service account auth, to use access token instead of user/password
   > set db user to "iam/azure" to use azure iam auth
diff --git a/build.gradle.kts b/build.gradle.kts
index 1e764f5f5..64aec46d2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -7,7 +7,7 @@ apply(plugin = "project")
 
 subprojects {
     group = "core.framework"
-    version = "9.0.8"
+    version = "9.0.9"
 
     repositories {
         maven {
diff --git a/core-ng/src/main/java/core/framework/internal/resource/Pool.java b/core-ng/src/main/java/core/framework/internal/resource/Pool.java
index b5000baf7..147039ea0 100644
--- a/core-ng/src/main/java/core/framework/internal/resource/Pool.java
+++ b/core-ng/src/main/java/core/framework/internal/resource/Pool.java
@@ -94,7 +94,7 @@ private boolean validate(PoolItem<T> item) {
             valid = false;
         }
         if (!valid) {
-            LOGGER.warn(errorCode("BROKEN_POOL_CONNECTION"), "connection is broken, try to reconnect immediately, pool=" + name);
+            LOGGER.warn(errorCode("BROKEN_POOL_CONNECTION"), "connection is broken, try to reconnect immediately, pool={}", name);
             closeItem(item);
         }
         return valid;
@@ -128,13 +128,15 @@ private PoolItem<T> waitNextAvailableItem() {
     private PoolItem<T> createNewItem() {
         var watch = new StopWatch();
         size.incrementAndGet();
+        PoolItem<T> item = null;
         try {
-            return new PoolItem<>(factory.get());
+            item = new PoolItem<>(factory.get());
+            return item;
         } catch (Throwable e) {
             size.getAndDecrement();
             throw e;
         } finally {
-            LOGGER.debug("create new resource, pool={}, elapsed={}", name, watch.elapsed());
+            LOGGER.debug("create new resource, pool={}, item={}, elapsed={}", name, item == null ? null : item.resource, watch.elapsed());
         }
     }
 
@@ -181,6 +183,7 @@ private void closeItem(PoolItem<T> item) {
     }
 
     private void closeResource(PoolItem<T> item) {
+        LOGGER.debug("close resource, pool={}, item={}", name, item.resource);
         try {
             item.resource.close();
         } catch (Exception e) {