--- Sharding Status --- sharding version: { "_id" : 1, "minCompatibleVersion" : 5, "currentVersion" : 6, "clusterId" : ObjectId("5cd3a54c07e08cf42f018f63") } shards: { "_id" : "rs-qa-c_0", "host" : "rs-qa-c_0/dc615353.domain:27017,dc615354.domain:27017", "state" : 1 } { "_id" : "rs-qa-c_1", "host" : "rs-qa-c_1/dc615355.domain:27017,dc615356.domain:27017", "state" : 1 } { "_id" : "rs-qa-c_2", "host" : "rs-qa-c_2/dc616512.domain:27017,dc616513.domain:27017", "state" : 1 } { "_id" : "rs-qa-c_3", "host" : "rs-qa-c_3/dc1008002.domain:27017,dc1008003.domain:27017", "state" : 1 } { "_id" : "rs-qa-c_4", "host" : "rs-qa-c_4/dc1008178.domain:27017,dc1008211.domain:27017", "state" : 1 } active mongoses: "4.0.14" : 1 autosplit: Currently enabled: yes balancer: Currently enabled: yes Currently running: no Failed balancer rounds in last 5 attempts: 0 Migration Results for the last 24 hours: 31962 : Success 1 : Failed with error 'aborted', from rs-qa-c_3 to rs-qa-c_4 databases: { "_id" : "CE", "primary" : "rs-qa-c_1", "partitioned" : true, "version" : { "uuid" : UUID("b2528616-3d55-4cdf-a1c7-2569646af0ad"), "lastMod" : 1 } } CE.C_COMM shard key: { "PERSON" : 1, "S-DT" : 1, "C_ID" : 1, "_id" : 1 } unique: true balancing: true chunks: rs-qa-c_0 52401 rs-qa-c_1 52401 rs-qa-c_2 52401 rs-qa-c_3 52400 rs-qa-c_4 52317 too many chunks to print, use verbose if you want to force print CE.C_ENTITY_COMM shard key: { "person" : 1, "dos" : 1, "cId" : 1 } unique: true balancing: true chunks: rs-qa-c_0 11241 rs-qa-c_1 11242 rs-qa-c_2 11242 rs-qa-c_3 11241 rs-qa-c_4 11241 too many chunks to print, use verbose if you want to force print CE.C_ERROR shard key: { "_id" : 1 } unique: false balancing: true chunks: rs-qa-c_0 320 rs-qa-c_1 320 rs-qa-c_2 320 rs-qa-c_3 320 rs-qa-c_4 320 too many chunks to print, use verbose if you want to force print CE.C_RETRY shard key: { "_id" : 1 } unique: false balancing: true chunks: rs-qa-c_0 6444 rs-qa-c_1 6444 rs-qa-c_2 6444 rs-qa-c_3 6445 rs-qa-c_4 6445 too many chunks to print, use verbose if you want to force print too many chunks to print, use verbose if you want to force print { "_id" : "config", "primary" : "config", "partitioned" : true } config.system.sessions shard key: { "_id" : 1 } unique: false balancing: true chunks: rs-qa-c_0 1 { "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : rs-qa-c_0 Timestamp(1, 0) { "_id" : "test", "primary" : "rs-qa-c_0", "partitioned" : false, "version" : { "uuid" : UUID("8862effa-f222-48cf-b7a7-a62cc426388a"), "lastMod" : 1 } }