obproxy 执行prepare语句发生断链重连

OceanBase 技术问题
#1

【产品名称】obproxy

【产品版本】v3.2.0

【问题描述】通过obproxy 连接集群后，执行prepare语句报lose connection

#2

麻烦提供下obproxy的日志，以及observer的版本。


另外，默认情况下prepare是关闭的，可以通过如下命令查看和打开


select * from oceanbase.__all_virtual_sys_parameter_stat where name="_ob_enable_prepared_statement";

ALTER system set _ob_enable_prepared_statement =true;
1 个赞
#3

按照提示打开了prepare：


MySQL [oceanbase]> select name, data_type, value, scope from oceanbase.__all_virtual_sys_parameter_stat where name='_ob_enable_prepared_statement';

+-------------------------------+-----------+-------+---------+

| name             | data_type | value | scope  |

+-------------------------------+-----------+-------+---------+

| _ob_enable_prepared_statement | NULL   | True | CLUSTER |

| _ob_enable_prepared_statement | NULL   | True | CLUSTER |

| _ob_enable_prepared_statement | NULL   | True | CLUSTER |

+-------------------------------+-----------+-------+---------+


observer 已经升级到了最新的社区版本：


MySQL [oceanbase]> select version();

+--------------------+

| version()     |

+--------------------+

| 3.1.2-OceanBase CE |

+--------------------+

1 row in set (0.00 sec)


通过proxy执行prepare依旧失败：

 

MySQL [test]> prepare stmt1 from 'INSERT INTO test.tb1 (id , name ) values ( ? , ? )';

Query OK, 0 rows affected (0.00 sec)


MySQL [test]> prepare stmt1 from 'INSERT INTO test.tb1 (id , name ) values ( ? , ? )';

ERROR 2013 (HY000): Lost connection to MySQL server during query

MySQL [test]> prepare stmt1 from 'INSERT INTO test.tb1 (id , name ) values ( ? , ? )';

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id:  655372

Current database: test


Query OK, 0 rows affected (0.01 sec)


直连observer 执行 prepare 不会出现断链现场：


MySQL [test]> prepare stmt1 from 'INSERT INTO test.tb1 (id , name ) values ( ? , ? )';

Query OK, 0 rows affected (0.01 sec)


MySQL [test]> prepare stmt1 from 'INSERT INTO test.tb1 (id , name ) values ( ? , ? )';

Query OK, 0 rows affected (0.00 sec)


MySQL [test]> prepare stmt1 from 'INSERT INTO test.tb1 (id , name ) values ( ? , ? )';

Query OK, 0 rows affected (0.00 sec)

#4

obproxy_error日志内容如下：


[time],undefined,,,,[clustername]:sys:test,OB_MYSQL,tb1,tb1,OB_MYSQL_COM_QUERY,TEXT_PS_PREPARE,failed,-4016,prepare stmt1 from 'INSERT INTO test.tb1 (id %2C name ) values ( ? %2C ? )',118us,0us,0us,0us,Y0-7F7D0BE0D3A0,,,,0,,Ooooooooooooops

#5

目前文本PS功能还有缺陷，需要等待后续版本修复