[SERVER-14573] Why my cluster is imbalance? Created: 16/Jul/14  Updated: 10/Dec/14  Resolved: 16/Jul/14

Status: Closed
Project: Core Server
Component/s: Admin
Affects Version/s: None
Fix Version/s: None

Type: Question Priority: Major - P3
Reporter: GaoYuan Assignee: Ramon Fernandez Marina
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:

 Description   

Hello,I am a user from China. I'm sorry my English is not good,but I will try my best to describe my problem clearly.

I have a cluster with 3 shards 3 config servers and 3 mongos.The dataset size is about 1T.I have may database and collections on this cluster.but almost all of the collectiosns is imbalance.The chunks moves very Slowly.

I check the logs,there are some problems:
【warning:config servers A and B differ】 this warning appears very often.
【ERROR: config servers not in sync !】
【when split chunk:the collection's metadata lock is taken】

I don't know what causes these problems occur.I hope to get help!
Thank you very much



 Comments   
Comment by Ramon Fernandez Marina [ 16/Jul/14 ]

gaoyuanopenfire, your cluster is not balanced because the config servers are out of sync, as the logs point out. You'll need to replace the offending config server to fix your cluster. Here's some documentation on replacing a config server, and also some instructions on fixing out-of-sync config servers.

That being said, note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server and tools. For MongoDB-related support discussion please post on the mongodb-user group or Stack Overflow with the mongodb tag. A question like this involving more discussion would be best posted on the mongodb-user group.

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