在运行时，该错误将出现在第 3 或第 4 行（具体行数取决于 JPA 提供者是否在查询构造或执行期间根据 JPQL 语法解析 JPQL 字符串）。
The error will be encountered at run time at line 3 or line 4 (depending on whether the JPA provider parses a JPQL string according to JPQL grammar during query construction or execution).
如果这些情形中的某一种适用于您，就需要检查服务器日志以确定代理是否运行，或在运行期间是否发生错误。
If one of these cases applies to you, you will need to examine the server log to determine whether or not the agent ran or had any errors during that run.
如果您在运行期间使用JDBC收到了错误消息，请查看之前第3步的解释。
If you have get error messages while using JDBC at run time, review the exceptions explained previously at the end of Step 3.
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