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ERROR: SET TRANSACTION ISOLATION LEVEL must be called before any query - Mailing list pgsql-general

From Xinlin Qian
Subject ERROR: SET TRANSACTION ISOLATION LEVEL must be called before any query
Date
Msg-id 001e01c1fd46$fb74d300$4f06a8c0@qian
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Our system is written by java, and connect to Postgresql with JDBC.
Sometimes, when Connection.setAutoCommit() function is executed, a SQLException is throwed, and Error message is as following:
    ERROR:  SET TRANSACTION ISOLATION LEVEL must be called before any query
 
This error often occurs when system is busy. so why?
 

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