CUBRIDPreparedStatement 에서 NullPointerException 발생

사용된 JDBC driver : CUBRID-JDBC-8.4.1.7007

 

* 에러 상황

SELECT COUNT(id) FROM table WHERE title LIKE '%검색어%' 와 같은 쿼리를 이용해 서버에 load test 중

CUBRIDPreparedStatement 에서 NullPointerException 발생

 

* 발생 빈도 : 낮음 (약 1만 2천회 테스트 중 2회 발생)

 

* Error Log

java.lang.NullPointerException
        at cubrid.jdbc.driver.CUBRIDPreparedStatement.checkIsOpen(CUBRIDPreparedStatement.java:913)
        at cubrid.jdbc.driver.CUBRIDPreparedStatement.setString(CUBRIDPreparedStatement.java:253)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:135)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:135)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:135)
        at sun.reflect.GeneratedMethodAccessor116.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.ibatis.common.jdbc.logging.PreparedStatementLogProxy.invoke(PreparedStatementLogProxy.java:70)
        at $Proxy186.setString(Unknown Source)
        at com.ibatis.sqlmap.engine.type.StringTypeHandler.setParameter(StringTypeHandler.java:30)
        at com.ibatis.sqlmap.engine.type.UnknownTypeHandler.setParameter(UnknownTypeHandler.java:69)
        at com.ibatis.sqlmap.engine.mapping.parameter.BasicParameterMap.setParameter(BasicParameterMap.java:165)
        at com.ibatis.sqlmap.engine.mapping.parameter.BasicParameterMap.setParameters(BasicParameterMap.java:125)
        at com.ibatis.sqlmap.engine.execution.SqlExecutor.executeQuery(SqlExecutor.java:184)
        at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.sqlExecuteQuery(GeneralStatement.java:205)
        at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:173)
        at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForObject(GeneralStatement.java:104)
        at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:566)
        at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:541)
        at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)
        at org.springframework.orm.ibatis.SqlMapClientTemplate$1.doInSqlMapClient(SqlMapClientTemplate.java:270)
        at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:200)
        at org.springframework.orm.ibatis.SqlMapClientTemplate.queryForObject(SqlMapClientTemplate.java:268)

 

위 상황에 대해서 혹시 예상되는 원인이나..

발생 방지 할 수 있는 방법이 있을까 하여 문의 드립니다~