fix bug：在出异常的时候，会调一次reconnect，这里面释放旧连接，创建新连接；进入下一次循环的时候，又创建一次连接，所以在reconnect里面创建的那个新连接就泄露了

oceanbasev10writer/src/main/java/com/alibaba/datax/plugin/writer/oceanbasev10writer/task/InsertTask.java

@@ -165,7 +165,6 @@ public class InsertTask implements Runnable {
 					} catch (InterruptedException e) {
 						LOG.info("thread interrupted ..., ignore");
 					}
-					connHolder.initConnection();
 					conn = connHolder.getConn();
 					LOG.info("retry {}, start do batch insert, size={}", i, buffer.size());
 					checkMemstore();