MySQLDetector异常导致的死循环

MySQLDetector 在出现异常情况下，使用的NIOReactor没有对异常进行处理，导致注册的OP_READ key没有取消掉，出现死循环打印错误异常的问题


Start by locating MySQLDetector and the NIOReactor path that registers OP_READ, then reproduce or inspect the exception flow shown in the issue. Done means the exceptional state no longer leaves the read key registered and the repeated error-printing loop stops.

Written by the indexing model from the issue text.