recover fatal error

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.alibaba</groupId>
 	<artifactId>druid</artifactId>
-	<version>1.1.20_preview_05</version>
+	<version>1.1.20_preview_06</version>
 
 	<packaging>jar</packaging>
 	<name>druid</name>

src/main/java/com/alibaba/druid/pool/DruidDataSource.java

@@ -1740,6 +1740,8 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             sql = sql.substring(0, 1024);
         }
 
+        DruidAbstractDataSource dataSource = holder.getDataSource();
+
         boolean requireDiscard = false;
         final ReentrantLock lock = conn.lock;
         lock.lock();
@@ -1755,18 +1757,23 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             fatalErrorCount++;
             lastFatalError = error;
             lastFatalErrorSql = sql;
-
-            ReentrantLock dataSourceLock = holder.getDataSource().lock;
-            dataSourceLock.lock();
-            try {
-                emptySignal();
-            } finally {
-                dataSourceLock.unlock();
-            }
         } finally {
             lock.unlock();
         }
 
+        if(dataSource != null) {
+            ReentrantLock dataSourceLock = dataSource.lock;
+            dataSourceLock.lock();
+            try {
+                if (poolingCount < minIdle) {
+                    emptySignal();
+                }
+            }
+            finally {
+                dataSourceLock.unlock();
+            }
+        }
+
         if (requireDiscard) {
             if (holder.statementTrace != null) {
                 holder.lock.lock();