mybatis-plus saveBatch方法java.lang.NullPointerException

现象：参数集合确定不为空吗，源码发现异常被mybatis-plus吞掉

java.lang.NullPointerException: null
    at java.base/java.util.Objects.requireNonNull(Objects.java:233)
    at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.executeBatch(ServiceImpl.java:232)
    at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.executeBatch(ServiceImpl.java:252)
    at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.saveBatch(ServiceImpl.java:127)
    at com.baomidou.mybatisplus.extension.service.IService.saveBatch(IService.java:69)
    at com.baomidou.mybatisplus.extension.service.IService$$FastClassBySpringCGLIB$$f8525d18.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:792)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:762)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:762)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:707)
    at com.xxx.service.service.impl.SkuServiceImpl$$EnhancerBySpringCGLIB$$74735693.saveBatch(<generated>)
    at com.xxx.service.service.impl.SkuServiceImpl.lambda$save$7(StoreProductServiceImpl.java:367)

 

实际：通过Arthas抓到真正异常

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1794)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: org.apache.ibatis.executor.BatchExecutorException: com.xxx.benefitmall.service.dao.SkuDao.insert (batch index #1) failed. Cause: java.sql.BatchUpdateException: Failed to read auto-increment value from storage engine
    at com.baomidou.mybatisplus.core.executor.MybatisBatchExecutor.doFlushStatements(MybatisBatchExecutor.java:159)
    at org.apache.ibatis.executor.BaseExecutor.flushStatements(BaseExecutor.java:129)
    at org.apache.ibatis.executor.BaseExecutor.flushStatements(BaseExecutor.java:122)
    at com.baomidou.mybatisplus.core.executor.MybatisCachingExecutor.flushStatements(MybatisCachingExecutor.java:216)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
    at java.base/java.lang.reflect.Method.invoke(Method.java:580)
    at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
    at jdk.proxy2/jdk.proxy2.$Proxy431.flushStatements(Unknown Source)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.flushStatements(DefaultSqlSession.java:252)
    ... 158 more
Caused by: java.sql.BatchUpdateException: Failed to read auto-increment value from storage engine
    at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
    at com.mysql.cj.util.Util.handleNewInstance(Util.java:192)
    at com.mysql.cj.util.Util.getInstance(Util.java:167)
    at com.mysql.cj.util.Util.getInstance(Util.java:174)

原因：id字段太短，自增超出长度范围，其实它sql异常在这里也会被mybatis-plus包装成NPE