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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: 3.2.5, 3.2.6
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Component/s: Sharding
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Labels:None
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ALL
When I tried to convert a huge collection (about 0.4 billion records) to a sharding collection, I found it could not move the chunks and could not split the chunks.
When the balance tried to move the chunk, I got the following error:
2016-05-24T15:22:52.418+0800 I SHARDING [Balancer] moveChunk result: { chunkTooBig: true, estimatedChunkSize: 33553905, ok: 0.0, errmsg: "chunk too big to move" }
2016-05-24T15:45:26.569+0800 W SHARDING [conn132080234] cannot move chunk: the maximum number of documents for a chunk is 250001 , the maximum chunk size is 67108864 , average document size is 133. Found 252289 documents in chunk
When it tried to split the chunk, I got the following error:
2016-05-24T15:22:52.530+0800 I SHARDING [Balancer] split results: CannotSplit: chunk not full enough to trigger auto-split
I use default chunk size 64MB.
mongos> db.settings.find()
{ "_id" : "chunksize", "value" : NumberLong(64) }
It seems that it fails to move because the record count is > 250001, and fails to split because the chunk size is not large enough?
My mongodbs version are 3.2.5 and 3.2.6.
- duplicates
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- Closed
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