修正并发的问题

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@220 b9813039-fb51-4c41-a8b9-e21c2acb5095

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

@@ -571,6 +571,7 @@ public abstract class DruidAbstractDataSource implements DataSource, DataSourceP
     protected void printStackTrace(Throwable e) {
         if (logWriter != null) {
             e.printStackTrace(logWriter);
+            logWriter.flush();
         }
     }
 

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

@@ -522,9 +522,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
                     ConnectionHolder poolableConnection = new ConnectionHolder(DruidDataSource.this, connection);
                     connections[count++] = poolableConnection;
 
-                    if (count == 1) {
-                        notEmpty.signal();
-                    }
+                    notEmpty.signal();
 
                 } catch (InterruptedException e) {
                     break;