diff --git a/pom.xml b/pom.xml
index 699a9060d6..99a6690aed 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
 	<groupId>com.alibaba</groupId>
 	<artifactId>druid</artifactId>
-	<version>0.2.18-SNAPSHOT</version>
+	<version>0.2.18</version>
 
 	<packaging>jar</packaging>
 	<name>druid</name>
diff --git a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
index 8e424e790b..6fc3528c78 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
@@ -248,8 +248,6 @@ public abstract class DruidAbstractDataSource extends WrapperAdapter implements
         this.useLocalSessionState = useLocalSessionState;
     }
 
-
-
     public boolean isOracle() {
         return isOracle;
     }
diff --git a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
index 97ec94f8b9..6ddbc2c4f1 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
@@ -33,6 +33,7 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
 
 import javax.management.JMException;
 import javax.management.ObjectName;
@@ -382,6 +383,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             return;
         }
 
+        final ReentrantLock lock = this.lock;
         try {
             lock.lockInterruptibly();
         } catch (InterruptedException e) {
diff --git a/src/main/java/com/alibaba/druid/support/logging/LogFactory.java b/src/main/java/com/alibaba/druid/support/logging/LogFactory.java
index c0f42b8f41..18b536144b 100644
--- a/src/main/java/com/alibaba/druid/support/logging/LogFactory.java
+++ b/src/main/java/com/alibaba/druid/support/logging/LogFactory.java
@@ -26,6 +26,7 @@ public class LogFactory {
         // TODO add slf4j logging
 
         // 优先选择log4j,而非Apache Common Logging. 因为后者无法设置真实Log调用者的信息
+		tryImplementation("org.slf4j.Logger", "com.alibaba.druid.support.logging.SLF4JImpl");
         tryImplementation("org.apache.log4j.Logger", "com.alibaba.druid.support.logging.Log4jImpl");
         tryImplementation("java.util.logging.Logger", "com.alibaba.druid.support.logging.Jdk14LoggingImpl");
         tryImplementation("org.apache.commons.logging.LogFactory",
diff --git a/src/main/java/com/alibaba/druid/support/logging/SLF4JImpl.java b/src/main/java/com/alibaba/druid/support/logging/SLF4JImpl.java
new file mode 100644
index 0000000000..bfab5af28b
--- /dev/null
+++ b/src/main/java/com/alibaba/druid/support/logging/SLF4JImpl.java
@@ -0,0 +1,105 @@
+package com.alibaba.druid.support.logging;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.spi.LocationAwareLogger;
+
+public class SLF4JImpl implements Log {
+	private static final String callerFQCN = SLF4JImpl.class.getName();
+	private static final Logger testLogger = LoggerFactory.getLogger(SLF4JImpl.class);
+	static {
+		//if the logger is not a LocationAwareLogger instance, it can not get correct stack StackTraceElement
+		//so ignore this implementation.
+		if (!(testLogger instanceof LocationAwareLogger)) {
+			throw new UnsupportedOperationException(testLogger.getClass()+" is not a suitable logger");
+		}
+	}
+	private int errorCount;
+	private int warnCount;
+	private int infoCount;
+	private LocationAwareLogger log;
+	
+	public SLF4JImpl(Class<?> clazz) {
+		Logger log = LoggerFactory.getLogger(clazz);
+		if (log instanceof LocationAwareLogger) {
+			this.log = (LocationAwareLogger) log;
+		}
+	}
+	
+	@Override
+	public boolean isDebugEnabled() {
+		return log.isDebugEnabled();
+	}
+	
+	@Override
+	public void error(String msg, Throwable e) {
+		log.log(null, callerFQCN, LocationAwareLogger.ERROR_INT, msg, null, e);
+		errorCount++;
+	}
+	
+	@Override
+	public void error(String msg) {
+		log.log(null, callerFQCN, LocationAwareLogger.ERROR_INT, msg, null, null);
+		errorCount++;
+	}
+	
+	@Override
+	public boolean isInfoEnabled() {
+		return log.isInfoEnabled();
+	}
+	
+	@Override
+	public void info(String msg) {
+		infoCount++;
+	}
+	
+	@Override
+	public void debug(String msg) {
+		log.log(null, callerFQCN, LocationAwareLogger.DEBUG_INT, msg, null, null);
+	}
+	
+	@Override
+	public void debug(String msg, Throwable e) {
+		log.log(null, callerFQCN, LocationAwareLogger.ERROR_INT, msg, null, e);
+	}
+	
+	@Override
+	public boolean isWarnEnabled() {
+		return log.isWarnEnabled();
+	}
+	
+	@Override
+	public void warn(String msg) {
+		log.log(null, callerFQCN, LocationAwareLogger.WARN_INT, msg, null, null);
+		warnCount++;
+	}
+	
+	@Override
+	public void warn(String msg, Throwable e) {
+		log.log(null, callerFQCN, LocationAwareLogger.WARN_INT, msg, null, e);
+		warnCount++;
+	}
+	
+	@Override
+	public int getErrorCount() {
+		return errorCount;
+	}
+	
+	@Override
+	public int getWarnCount() {
+		return warnCount;
+	}
+	
+	@Override
+	public int getInfoCount() {
+		return infoCount;
+	}
+	
+	@Override
+	public void resetStat() {
+		errorCount = 0;
+		warnCount = 0;
+		infoCount = 0;
+	}
+	
+}
diff --git a/src/test/java/com/alibaba/druid/filter/config/ConfigFileGenerator.java b/src/test/java/com/alibaba/druid/filter/config/ConfigFileGenerator.java
index a3e5ca1218..53e7923524 100644
--- a/src/test/java/com/alibaba/druid/filter/config/ConfigFileGenerator.java
+++ b/src/test/java/com/alibaba/druid/filter/config/ConfigFileGenerator.java
@@ -29,6 +29,7 @@ public class ConfigFileGenerator {
             filePath = file.getAbsolutePath();
 
             out = new PrintWriter(new FileWriter(file));
+            out.println(DruidDataSourceFactory.PROP_MAXWAIT + "=1000");
             out.println(DruidDataSourceFactory.PROP_USERNAME + "=test1");
             out.println(DruidDataSourceFactory.PROP_PASSWORD + "=OJfUm6WCHi7EuXqE6aEc+Po2xFrAGBeSNy8O2jWhV2FTG8/5kbRRr2rjNKhptlevm/03Y0048P7h88gdUOXAYg==");
             out.println(DruidDataSourceFactory.PROP_URL + "=jdbc:oracle:thin:@");