MyBatis Query exception-error querying database. Cause:java.lang.ClassCastException:org.apache.ibatis.executor.ExecutionPlaceholder cannot is cast to Java.util.List

Background, MyBatis query when directly take the sqlsession, no packaging into sqlsessiontemplate, did not go Spring provides agent.

Then I wrote the code to get sqlsession without taking into account the concurrency situation, causing sqlsession to build too much

When the concurrency is large, the query error

 
 
org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.ClassCastException: org.apache.ibatis.executor.ExecutionPlaceholder cannot be cast to java.util.List
### The error may exist in class path resource [mybatis/ConVideoInfoMapper.xml]
### The error may involve com.letv.mms.core.dao.IConVideoInfoDao.selectById
### The error occurred while executing a query
### Cause: java.lang.ClassCastException: org.apache.ibatis.executor.ExecutionPlaceholder cannot be cast to java.util.List
        at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23) ~[mybatis-3.1.1.jar:3.1.1]
        at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:104) ~[mybatis-3.1.1.jar:3.1.1]
        at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:95) ~[mybatis-3.1.1.jar:3.1.1]
        at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:59) ~[mybatis-3.1.1.jar:3.1.1]
        at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:95) ~[mybatis-3.1.1.jar:3.1.1]
        at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:40) ~[mybatis-3.1.1.jar:3.1.1]

Workaround, give spring to manage MyBatis, and use Sqlsessiontemplate.

MyBatis Query exception-error querying database. Cause:java.lang.ClassCastException:org.apache.ibatis.executor.ExecutionPlaceholder cannot is cast to Java.util.List