#!/bin/sh # This script is run on every mongo node. However, it checks to see if this node is the primary mongo node. # If it is, mongo db is backed up and deleted the user session collection files. # If this node is not primary mong node, nothing is…
MongoDB Connector for Hadoop https://github.com/mongodb/mongo-hadoop Purpose The MongoDB Connector for Hadoop is a library which allows MongoDB (or backup files in its data format, BSON) to be used as an input source, or output destination, for Hadoo…
1.$sample stage could not find a non-duplicate document while using a random cursor 这个问题比较难解决,因为我用mongodb spark connector没用到sample,但是在生成RDD的过程中会进行sample操作,所以没法避免,出现这个问题的原因也不可控,在jira上有这个问题,但并没有一个合理的解决方案,stackoverflow上也没有解决办法,就我个人而言,出现这个问题有几个特征: a) 出现在…