作者Michael Kay的一句话惊醒梦中人：
I don't think that reusing the QueryProcessor should be a problem, but you possibly need to make sure that each query has its own StaticContext.
The change you've made to the code seems way out, I think you've misdiagnosed the problem.
所以，每次执行查询的时候都必须新生成StaticQueryContext和DynamicQueryContext
