空指针异常

[limingwei]

java.lang.NullPointerException at com.alibaba.druid.pool.DruidDataSource.getConnectionInternal(DruidDataSource.java:1386) at com.alibaba.druid.pool.DruidDataSource.getConnectionDirect(DruidDataSource.java:1223) at com.alibaba.druid.filter.FilterChainImpl.dataSource_connect(FilterChainImpl.java:4619) at com.alibaba.druid.filter.FilterAdapter.dataSource_getConnection(FilterAdapter.java:2745) at com.alibaba.druid.filter.FilterAdapter$$FastClassBySpringCGLIB$$57d94f6c.invoke() at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)

[limingwei]

只有这么多信息了，某一个特定的实例有这个问题，别的实例就没这个问题

[limingwei]

mysql 驱动 5.1.18

[limingwei]

换其他版本的 mysql 驱动，会有其他的问题 可能是这个程序实例或数据库实例有啥特殊的 但不管咋说 NullPointerException 总是值得处理掉的

[wenshao]

druid什么版本？

[junzi2099]

我也遇到这个问题。定位发现是因为druid配置的initialSize的值大于maxActive的值导致的。