[Performance] OGNL 3.4.9 synchronized lock causes thread blocking under high concurrency (fixed in OGNL 3.5.0 BETA2)

About the Bug...

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of MyBatis.

• I have confirmed this bug reproduces without 3rd party extensions (e.g. mybatis-plus).

Database Version

Oracle

JDBC Driver Version

ojdbc8

Issue Description

1. We are using MyBatis 3.5.19 in a high-concurrency business scenario (QPS ~ 11000+). During pressure testing, we found severe thread blocking issues, and we analysis showed the root cause is the global synchronized lock in method：ognl.internal.ClassCacheHandler.getHandler

2. ognl3.4.9 has Performance issue https://github.com/orphan-oss/ognl/pull/406，and fixed in 3.5.0 BETA1

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