diff --git a/java/connector-node/risingwave-connector-service/pom.xml b/java/connector-node/risingwave-connector-service/pom.xml
index ea1ab9bb8898..8ae942d7aca2 100644
--- a/java/connector-node/risingwave-connector-service/pom.xml
+++ b/java/connector-node/risingwave-connector-service/pom.xml
@@ -38,7 +38,10 @@
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
         </dependency>
-
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
@@ -59,6 +62,8 @@
             <groupId>io.prometheus</groupId>
             <artifactId>simpleclient_httpserver</artifactId>
         </dependency>
+
+        <!-- test dependencies -->
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
diff --git a/java/connector-node/tracing/src/main/java/com/risingwave/tracing/TracingSlf4jAdapter.java b/java/connector-node/tracing/src/main/java/com/risingwave/tracing/TracingSlf4jAdapter.java
index 5ccef41e9ac1..e0aee7633c51 100644
--- a/java/connector-node/tracing/src/main/java/com/risingwave/tracing/TracingSlf4jAdapter.java
+++ b/java/connector-node/tracing/src/main/java/com/risingwave/tracing/TracingSlf4jAdapter.java
@@ -63,8 +63,8 @@ private void logIfEnabled(int level, String format, Object... arguments) {
 
     private void logIfEnabled(int level, String msg, Throwable t) {
         if (TracingSlf4jImpl.isEnabled(level)) {
-            String sStackTrace = ExceptionUtils.getStackTrace(t);
-            TracingSlf4jImpl.event(name, level, String.format("%s: %s", msg, sStackTrace));
+            String stackTrace = ExceptionUtils.getStackTrace(t);
+            TracingSlf4jImpl.event(name, level, String.format("%s: %s", msg, stackTrace));
         }
     }