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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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Sharding NYC
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Fully Compatible
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ALL
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Sharding NYC 2023-04-03, Sharding NYC 2023-04-17
On CSRS, an attempt to run reshardCollection on config.system.sessions fails:
mongos> db.adminCommand({reshardCollection: "config.system.sessions", key: {uid: 1}, numInitialChunks: 2})
{
"ok" : 0,
"errmsg" : "Cannot accept sharding commands if not started with --shardsvr",
"code" : 193,
"codeName" : "NoShardingEnabled",
"$clusterTime" : {
"clusterTime" : Timestamp(1678464167, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1678464167, 1)
}
With a config shard configuration, it is allowed and appears to hang:
mongos> db.adminCommand({reshardCollection: "config.system.sessions", key: {uid: 1}, numInitialChunks: 2})
The following log messages are printed every 10 seconds in the config shard mongod.log file. Note the balancer error: "Unable to enforce zone range policy for collection" / "Expected collection config.system.resharding.edad0981-4f37-4de4-a52c-1a1b117a5ac9 to be sharded"
{"t":{"$date":"2023-03-10T11:06:37.536-05:00"},"s":"I", "c":"SH_REFR", "id":4619902, "ctx":"CatalogCache-4","msg":"Collection has found to be unsharded after refresh","attr":{"namespace":"config.system.resharding.edad0981-4f37-4de4-a52c-1a1b117a5ac9","durationMillis":0}}
{"t":{"$date":"2023-03-10T11:06:37.536-05:00"},"s":"W", "c":"SHARDING", "id":21852, "ctx":"Balancer","msg":"Unable to enforce zone range policy for collection","attr":{"namespace":"config.system.resharding.edad0981-4f37-4de4-a52c-1a1b117a5ac9","error":{"code":118,"codeName":"NamespaceNotSharded","errmsg":"Expected collection config.system.resharding.edad0981-4f37-4de4-a52c-1a1b117a5ac9 to be sharded"}}}
{"t":{"$date":"2023-03-10T11:06:37.539-05:00"},"s":"I", "c":"SH_REFR", "id":4619901, "ctx":"CatalogCache-4","msg":"Refreshed cached collection","attr":{"namespace":"config.system.sessions","lookupSinceVersion":"1|1029||640a3ba7530410d994f8fe59||Timestamp(1678392231, 9)","newVersion":"{ chunkVersion: { e: ObjectId('640a3ba7530410d994f8fe59'), t: Timestamp(1678392231, 9), v: Timestamp(1, 1029) }, forcedRefreshSequenceNum: 7839, epochDisambiguatingSequenceNum: 7840 }","timeInStore":"{ chunkVersion: \"None\", forcedRefreshSequenceNum: 7838, epochDisambiguatingSequenceNum: 7839 }","durationMillis":2}}
{"t":{"$date":"2023-03-10T11:06:37.550-05:00"},"s":"I", "c":"SH_REFR", "id":4619901, "ctx":"CatalogCache-4","msg":"Refreshed cached collection","attr":{"namespace":"config.system.sessions","lookupSinceVersion":"1|1029||640a3ba7530410d994f8fe59||Timestamp(1678392231, 9)","newVersion":"{ chunkVersion: { e: ObjectId('640a3ba7530410d994f8fe59'), t: Timestamp(1678392231, 9), v: Timestamp(1, 1029) }, forcedRefreshSequenceNum: 7841, epochDisambiguatingSequenceNum: 7842 }","timeInStore":"{ chunkVersion: \"None\", forcedRefreshSequenceNum: 7840, epochDisambiguatingSequenceNum: 7841 }","durationMillis":1}}