An industrial-grade C++ implementation of RAFT consensus algorithm based on brpc, widely used inside Baidu to build highly-available distributed systems.
iter->set_error_and_rollback()框架内不应该调用当前entry的done->Run()，应该由业务方统一处理（成功、失败都调用done->Run())。否则，就得像example:block中那样写：
// Let raft run this closure.
closure_guard.release();
// Some disk error occurred, notify raft and never apply any data
// ever after
iter.set_error_and_rollback();
iter->set_error_and_rollback()框架内不应该调用当前entry的done->Run()，应该由业务方统一处理（成功、失败都调用done->Run())。否则，就得像example:block中那样写： // Let raft run this closure. closure_guard.release(); // Some disk error occurred, notify raft and never apply any data // ever after iter.set_error_and_rollback();
这样写很丑陋，逻辑异化了。而且IteratorImpl::run_the_rest_closure_with_error()名字表达的是调用剩余的closure，但是实现上把当前closure也调用了（ntail=1时候）。