jacky1193610322 commented on issue #688: MappedFileQueue load may cause the large file blank URL: https://github.com/apache/rocketmq/issues/688#issuecomment-457061664 如果保存了每个concume queue的offset，那么这个offset还是不一定能用，因为consume offset最终还是要索引到commitlog,假如commitlog 没有对应的数据，那么consume queue保存的这个offset也没有意义，所以最终就算有了这个offset，还是要根据commitlog来修复一遍，因为他们不是一起刷盘的。
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