MetricWriter has a bug that may not have an index file

[interxd]

问题描述

MetricWriter存在隐含bug
MetricWriter构造函数中将lastSecond初始化为当前时间戳，如果在同一时间戳调用write函数写入log，走下面的分支，可能出现没有写索引文件的bug：

[sentinel-bot]

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MetricWriter has a bug that may not have an index file

Problem Description

MetricWriter has an implicit bug
The lastSecond is initialized to the current timestamp in the MetricWriter constructor. If the write function is called to write the log at the same timestamp, and the following branch is taken, there may be a bug in which the index file is not written:

[sczyh30]

Hi, thanks for reporting. @CarpenterLee Could you please check for this?

[canglang1973]

@CarpenterLee Hi,I have a question. I can like to ask the index file's function. I see the source code ,the index file only record time and offset ,but Never used it.

[canglang1973]

Ok sorry . I see it used in MetricSearcher.