Two xml with same namespace interface, cache uncleared when invoke update in second xml

[DC-ET]

MyBatis version

3.4.4 (Tried 3.5.1, get the same result)

Database vendor and version

MySQL5.7 Innodb

Test case or example project

https://gitee.com/yangjiayi/mybatis-issue-test

Steps to reproduce

Create two Mapper.xml that with same namespace interface, such as

Add cache node to IssueMapper.xml, like this

Step1. invoke select method that implemented in IssueMapper.xml, Hit cache false.

Step2. invoke update method that implemented in IssueMapperExt.xml.

Step3. invoke select method that implemented in IssueMapper.xml again, Hit cache true!

Expected result

Step3 get the lastest data in database

Actual result

Step3 get same data with step1, not latest data in database

[DC-ET]

I try to add cache node in both xml, but it throw an Exception

[harawata]

Adding <cache-ref /> to IssueMapperExt.xml may fix the problem.

<cache-ref namespace="com.zoi7.mybatis.issue.test.mapper.IssueMapper" />

[DC-ET]

Adding <cache-ref /> to IssueMapperExt.xml may fix the problem.

<cache-ref namespace="com.zoi7.mybatis.issue.test.mapper.IssueMapper" />

Amazing! it works, so thanks!