MyBatis Whether the local cache needs to be locked to ensure data correctness?

BaseExecutor.query(MappedStatement ms, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, CacheKey key, BoundSql boundSql)

When A thread A perform enclosing localCache. PutObject (key, ExecutionPlaceholder. EXECUTION_PLACEHOLDER), Is thread B executing to list = resultHandler == null? (List)this.localCache.getObject(key) : null; castException, a data inconsistency problem, occurs. Do you need to lock when updating localCache?

Comment From: harawata

Hello @lyf712 ,

Not unless you share something that is not thread safe (e.g. SqlSession). Please read the documentation. https://mybatis.org/mybatis-3/getting-started.html

If you still think there is a bug, please provide a repro so that we can investigate.

Comment From: lyf712

get it! thank u