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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: 2.6.5
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Component/s: Sharding
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None
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Sharding
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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
MongoDB shell version: 2.6.5
connecting to: mpfs
mpfs(obj: 14160349610; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.count()
49215220
mpfs(obj: 14160350020; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.stats()
{
"sharded" : true,
"systemFlags" : 1,
"userFlags" : 1,
"ns" : "mpfs.deleted_preview_mids",
"count" : 49215252,
"numExtents" : 150,
"size" : 11811660480,
"storageSize" : 14662729728,
"totalIndexSize" : 3586108064,
"indexSizes" : {
"_id_" : 3586108064
},
"avgObjSize" : 240,
"nindexes" : 1,
"nchunks" : 66,
"shards" : {
"see full doc here" : "http://pastebin.com/uk8jDLxh"
},
"ok" : 1
}
'bad' mongos:
root@mpfs1g:~# mongo mpfs
MongoDB shell version: 2.6.5
connecting to: mpfs
mpfs(obj: 14160106632; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.find()
mpfs(obj: 14160114836; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.count()
0
mpfs(obj: 14160116026; size: 12740/13085/18850 Gb)> db.deleted_preview_mids.stats()
{
"sharded" : false,
"primary" : "disk1",
"ns" : "mpfs.deleted_preview_mids",
"count" : 0,
"size" : 0,
"storageSize" : 2140639232,
"numExtents" : 20,
"nindexes" : 1,
"lastExtentSize" : 560488448,
"paddingFactor" : 1,
"systemFlags" : 1,
"userFlags" : 1,
"totalIndexSize" : 8176,
"indexSizes" : {
"_id_" : 8176
},
"ok" : 1,
"$gleStats" : {
"lastOpTime" : Timestamp(1425537763, 69),
"electionId" : ObjectId("54f60db899569dad97618eb1")
}
}
mpfs(obj: 14160439248; size: 12740/13085/18850 Gb)> use config
switched to db config
config(obj: 252371; size: 0/0/0 Gb)> db.chunks.find({ns: 'mpfs.deleted_preview_mids'}).count()
66
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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