RocketMQ报错提示logics disk maybe full soon, so reclaim space, -1.0

Posted 2022-12-15 帷幄庸者

异常信息：

disk space will be full soon, but delete file failed.
logics disk maybe full soon, so reclaim space, -1.0
begin to delete before 72 hours file. timeup: false spacefull: true manualDeleteFileSeveralTimes: 0 cleanAtOnce: false

注意：这个问题并不是说明磁盘空间不够，而是因为可能在检验中出现异常。

核心代码

参看RocketMQ源码：UtilAll、DefaultMessageStore

public static double getDiskPartitionSpaceUsedPercent(final String path) 
        if (null == path || path.isEmpty()) 
            log.error("Error when measuring disk space usage, path is null or empty, path : ", path);
            return -1;
        


        try 
            File file = new File(path);

            if (!file.exists()) 
                log.error("Error when measuring disk space usage, file doesn't exist on this path: ", path);
                return -1;
            


            long totalSpace = file.getTotalSpace();

            if (totalSpace > 0) 
                long freeSpace = file.getFreeSpace();
                long usedSpace = totalSpace - freeSpace;

                return usedSpace / (double) totalSpace;
            
         catch (Exception e) 
            log.error("Error when measuring disk space usage, got exception: :", e);            return -1;
        

        return -1;
    

解释：so reclaim space, -1.0，这里的-1是在上面方法校验中返回的，有如下异常情况可能：

• commitlog、consumequeue的变量不存在或者为空、或者consumequeue、commitlog文件实际不存在
• 或者在磁盘校验比对空间剩余大小出现异常情况
• 或者totalSpace计算出来<0的异常情况

正常是返回目前磁盘剩余空间的比例

参考：http://www.lpnote.com/2019/01/04/solve-a-disk-warning-illusion-caused-by-rocketmq/