postgresql集群报错解决：SELECT pg_catalog.pg_try_advisory_xact_lock_shared(65535, 65535)

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10月25号之后只能对evap数据库进行select操作，且运行报错如下：

org.postgresql.util.PSQLException: 
ERROR: pooler: failed to create connections in parallel mode for thread 140705041217280 
在位置：SQL statement 
"EXECUTE DIRECT ON (cn_5002) 'SELECT pg_catalog.pg_try_advisory_xact_lock_shared(65535, 65535)'"

查询用户线权限：

 查询表权限：

select * from INFORMATION_SCHEMA.role_table_grants where table_catalog='evap' and table_name='z_area_monitor_qygn12' and table_schema='public';

select * from INFORMATION_SCHEMA.role_table_grants where grantee='admin';

查看锁，无问题：

解决办法：gsql登录时换用66.30，端口不变，操作恢复正常 

参考文章：https://sourceforge.net/p/postgres-xc/mailman/message/32086357/

https://www.oschina.net/translate/postgresql-locking-revealed    PostgreSQL 锁解密

https://yq.aliyun.com/ask/184?order=ctimepg中关于AccessShareLock和ExclusiveLock的问题

https://blog.csdn.net/cdnight/article/details/84452012【pg数据库】表锁 行锁 隔离级别及xmin xmax等系统行含义

https://blog.csdn.net/constzl/article/details/79206887AntDB重分布流程记录