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Type:
Bug
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Status: Closed
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Priority:
Major - P3
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Resolution: Gone away
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Affects Version/s: 2.6.5
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Fix Version/s: None
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Component/s: Sharding
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Labels:None
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Operating System:ALL
I have sharded cluster and several mongos instances connected to it.
After significant growth of one of the non-sharded collection on initial shard, it was sharded with key {_id: 1}, splitted to dozens of chunks and completely moved by sh.moveChunk() from initial shard.
After that, half of mongos instances began to see whole collection as sharded, but some mongos still thinks, than collection is not sharded and is empty.
Examples:
'good' mongos:
root@mpfs1h:~# mongo mpfs
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MongoDB shell version: 2.6.5
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connecting to: mpfs
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mpfs(obj: 14160349610; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.count()
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49215220
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mpfs(obj: 14160350020; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.stats()
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{
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"sharded" : true,
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"systemFlags" : 1,
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"userFlags" : 1,
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"ns" : "mpfs.deleted_preview_mids",
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"count" : 49215252,
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"numExtents" : 150,
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"size" : 11811660480,
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"storageSize" : 14662729728,
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"totalIndexSize" : 3586108064,
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"indexSizes" : {
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"_id_" : 3586108064
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},
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"avgObjSize" : 240,
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"nindexes" : 1,
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"nchunks" : 66,
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"shards" : {
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"see full doc here" : "http://pastebin.com/uk8jDLxh"
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},
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"ok" : 1
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}
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'bad' mongos:
root@mpfs1g:~# mongo mpfs
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MongoDB shell version: 2.6.5
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connecting to: mpfs
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mpfs(obj: 14160106632; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.find()
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mpfs(obj: 14160114836; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.count()
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0
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mpfs(obj: 14160116026; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.stats()
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{
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"sharded" : false,
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"primary" : "disk1",
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"ns" : "mpfs.deleted_preview_mids",
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"count" : 0,
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"size" : 0,
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"storageSize" : 2140639232,
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"numExtents" : 20,
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"nindexes" : 1,
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"lastExtentSize" : 560488448,
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"paddingFactor" : 1,
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"systemFlags" : 1,
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"userFlags" : 1,
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"totalIndexSize" : 8176,
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"indexSizes" : {
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"_id_" : 8176
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},
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"ok" : 1,
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"$gleStats" : {
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"lastOpTime" : Timestamp(1425537763, 69),
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"electionId" : ObjectId("54f60db899569dad97618eb1")
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}
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}
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mpfs(obj: 14160439248; size: 12740/13085/18850 Gb)> use config
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switched to db config
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config(obj: 252371; size: 0/0/0 Gb)> db.chunks.find({ns: 'mpfs.deleted_preview_mids'}).count()
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66
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After 'bad' mongos restart, everything becomes OK.
- is related to
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SERVER-14394 Create initial chunks directly on shards
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- Closed
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