Druid数据库连接池异常connection holder is null

具体如下：### Error updating database.  Cause: java.sql.SQLException: connection holder is null

### Cause: java.sql.SQLException: connection holder is null

; uncategorized SQLException for SQL []; SQL state [null]; error code [0]; connection holder is null; nested exception is java.sql.SQLException: connection holder is null

at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84)

at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)

at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)

at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)

at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371)

at com.sun.proxy.$Proxy15.insert(Unknown Source)

at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:240)

at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:51)

at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)

at com.sun.proxy.$Proxy28.insertList(Unknown Source)

at com.ajia.data.synchronize.service.score.impl.QuestScoreServiceImpl.insertList(QuestScoreServiceImpl.java:59)

at com.ajia.data.synchronize.service.score.impl.QuestScoreServiceImpl$$FastClassBySpringCGLIB$$18f74d0e.invoke()

at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)

at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)

at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)

at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)

connection holder 这肯定是连接池的异常，就看看连接池的配置。

#超过时间限制是否回收

removeAbandoned=true

#超过时间限制多长

removeAbandonedTimeout=300

解决方法一

我的任务时间比较长，而这个又这么短，就设置长一点，设置成一小时#超过时间限制多长

removeAbandonedTimeout=3600

解决方法二

直接设置成是不用超时回收连接removeAbandoned=false