mongodb 常见问题

1、./mongod: error while loading shared libraries: /usr/lib64/libstdc++.so.6: ELF file OS ABI invalid

二进制级别不兼容

解决办法：从正常的机器上拷贝libstdc++.so.6 替换相应的文件即可

2、启动mongos 不成功，查看日志出现：

config servers localhost:27017 and localhost:12000 differ

config servers localhost:27017 and localhost:12000 differ

config servers localhost:27017 and localhost:12000 differ

config servers localhost:27017 and localhost:12000 differ

config servers not in sync! config servers localhost：27017 and localhost:12000 differ

chunks: “d41d8cd98f00b204e9800998ecf8427e” EOO

databases: “0195c739c938fdafd9632279694ea64e” EOO

Wed Oct 09 15:36:42 [mongosMain] configServer connection startup check failed

解决办法：

说明你第一次实验参与集群的mongod服务与当前参与集群的mongod服务数量不一致。解决方法是把第一次参与集群的mongod 数据目录下所有的config.0，config.1，config.ns 删除。重新启动mongos即可。