We see lots of errors like the following in the Mongodb log:
2015-08-27T16:41:14.593-0700 I WRITE [conn175986] warning: log line attempted (11k) over max size (10k), printing beginning and end ... update DCU.UserData query:

{ id: "UserData:b1c027d0ee8f273a7fd8b373" }

update: { $set: { Meta:

{ Version: 26 }

, ProfileData: { Name: "user_adv_178648", XP: 97, Level: 2, Currencies:

{ Matter: 0, Antimatter: 0, Triumph: 1800, HeroPoints: 18778, Tempus: 984004, Energy: 17, Stamina: 5, PvP: 0 }

, CurrenciesLastUpdate:

{ Energy: 1440718849, Stamina: 1438644946 }

, Upgrades:

{ Superteams: 2, Energy: 1, Stamina: 1 }

, SeenFlags: [ "FirstViewOfSkills", "FirstSelectableTarget", "SecondViewOfSkills", "FTUEFirstBattleComplete", "FTUESecondBattleComplete", "StoreFTUE", "CardFTUE", "CampaignFTUE", "SuperteamSwipeToAddTutorial", "FTUEStorePurchase" ], LastCurrencyUpdate: 0, PvEBattleID: null, PvPBattleIDs: {}, CurrentBattleID: "", IsNewUser: false, Band: "proto_matchmaking_band_0", ExperimentData:

{ PvPSuperteamLocking: 0 }

, Locale: "Default" }, InventoryData: { Items: [

{ ID: "proto_memento_commonutility1", RK: 1, NUM: 2 }

,

{ ID: "proto_memento_xprare1", RK: 1, NUM: 1 }

,

{ ID: "proto_memento_recipephysicalcommon1", RK: 1, NUM: 1 }

,

{ ID: "proto_memento_commondefense1", RK: 1, NUM: 1 }

], Shards:

{ proto_shard_greenlantern_b: 1, proto_shard_zatanna_c: 1, proto_shard_harleyquinn_s: 1, proto_shard_cheetah_s: 0, proto_shard_blackcanary_b: 0, proto_shard_mirrormaster_c: 0, proto_shard_chemo_b: 0, proto_shard_raven_c: 0, proto_shard_bizarro_b: 0, proto_shard_deadshot_s: 0, proto_shard_huntress_s: 0, proto_shard_lexluthor_c: 0, proto_shard_greenarrow_s: 0, proto_shard_joker_c: 0, proto_shard_doomsday_b: 0, proto_shard_hawkgirl_s: 0, proto_shard_wonderwoman_s: 0, proto_shard_lexluthor_b: 0, proto_shard_solomongrundy_b: 0, proto_shard_wonderwoman_b: 0 }

, Cards: [ { ID: "Card_b1c027d0ee8f273a7fd8b373_09b5f5c6ec6482190b52eb79", Rarity: "Legendary", Reward:

{ ID: "proto_memento_UncommonUtility1", Type: "Memento", Amount: 1, Rank: 1 }

, CreatedAt: 1438643424, DropSource:

{ Type: "Battle", battleId: "proto_scripted_battle_pvp_0_1", mapId: "proto_map_chapter1map1", nodeId: "Node2", campaignId: "campaign" }

}, { ID: "Card_b1c027d0ee8f273a7fd8b373_94d7f77c246dba8b59b69eef", Rarity: "Legendary", Reward:

{ ID: "proto_memento_CommonDefense1", Type: "Memento", Amount: 1, Rank: 1 }

, CreatedAt: 1438644487, DropSource:

{ Type: "Conquest" }

}, { ID: "Card_b1c027d0ee8f273a7fd8b373_4e6ae5df6f1ff9a632c98b67", Rarity: "Legendary", Reward:

{ ID: "proto_memento_RecipePhysicalUncommon1", Type: "Memento", Amount: 1, Rank: 1 }

, CreatedAt: 1438644487, DropSource:

{ Type: "Conquest" }

}, { ID: "Card_b1c027d0ee8f273a7fd8b373_dba34c87dc5f7d4ac7b78067", Rarity: "Legendary", Reward:

{ ID: "proto_memento_EnergyCommon1", Type: "Memento", Amount: 1, Rank: 1 }

, CreatedAt: 1438644487, DropSource:

{ Type: "Conquest" }

}, { ID: "Card_b1c027d0ee8f273a7fd8b373_5431a22b18141b553f37b879", Rarity: "Legendary", Reward:

{ ID: "proto_memento_XPRare1", Type: "Memento", Amount: 1, Rank: 1 }

, CreatedAt: 1438644487, DropSource:

{ Type: "Conquest" }

} ] }, ConquestStates: [], OutpostData:

{ LastSearchTime: 0 }

, CharacterData: { OwnedCharacters: [

{ ID: "Character_b1c027d0ee8f273a7fd8b373_6af0d75f1c05de406ef4187b", ProtoID: "proto_greenlantern_b", Rank: 4, XP: 0, Mementos: [], MementoSlots: 6, LastUpdated: 1437085798, LastBattle: 0, Mastery: 1, TrainedAbilities: [] }

,

{ ID: "Character_b1c027d0ee8f273a7fd8b373_acb7da9f4d2d94675fce595e", ProtoID: "proto_zatanna_c", Rank: 4, XP: 0, Mementos: [], MementoSlots: 6, LastUpdated: 1437 .......... _84194db6a6ec92e8e56216db", "Character_b1c027d0ee8f273a7fd8b373_b6c0fd25f08109f7d3c03f8e" ], LastUpdated: 1438640984, Locked: false }

,

{ Name: "Superteam 3", IconSprite: "", Heroes: [ "Character_b1c027d0ee8f273a7fd8b373_9a7313e948c19459a4447e1d", "Character_b1c027d0ee8f273a7fd8b373_833a6980cab533673acbde54", "Character_b1c027d0ee8f273a7fd8b373_7c12b2d1738a3fb08890564e", "Character_b1c027d0ee8f273a7fd8b373_d320aa3ce01ccde26db9bde4" ], LastUpdated: 1438640993, Locked: false }

,

{ Name: "Superteam 4", IconSprite: "", Heroes: [ "Character_b1c027d0ee8f273a7fd8b373_dbd517f13946ed35eb93b3ac", "Character_b1c027d0ee8f273a7fd8b373_26b6fd699d4cab0c8c409a7d", "Character_b1c027d0ee8f273a7fd8b373_0b8a4be3785e36b63a483e40", "Character_b1c027d0ee8f273a7fd8b373_99cfc5c7316ba466db0599b0" ], LastUpdated: 1438641065, Locked: false }

] }, MissionData: { proto_scripted_mission_301_beta:

{ state: "Collectable", completions: 0, stateChangeTimestamp: 1438630967, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 1 ] }

, proto_scripted_mission_310_beta:

{ state: "Collectable", completions: 0, stateChangeTimestamp: 1438630967, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 17 ] }

, proto_scripted_mission_313_beta:

{ state: "Collectable", completions: 0, stateChangeTimestamp: 1438643424, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 1 ] }

, proto_scripted_mission_316_beta:

{ state: "Collectable", completions: 0, stateChangeTimestamp: 1438631031, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 1 ] }

, proto_scripted_mission_319_beta:

{ state: "Active", completions: 0, stateChangeTimestamp: 1438642997, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 0 ] }

, proto_scripted_mission_337_beta:

{ state: "Active", completions: 0, stateChangeTimestamp: 1438642997, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 0 ] }

, proto_scripted_mission_340_beta:

{ state: "Active", completions: 0, stateChangeTimestamp: 1438642997, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 0 ] }

, proto_scripted_mission_343_beta:

{ state: "Active", completions: 0, stateChangeTimestamp: 1438642997, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 0 ] }

, proto_scripted_mission_376_beta:

{ state: "Active", completions: 0, stateChangeTimestamp: 1438642997, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 0 ] }

, proto_scripted_mission_379_beta:

{ state: "Active", completions: 0, stateChangeTimestamp: 1438642997, lastUpdateTimestamp: 1440718849, storedGoalProgress: [ 0 ] }

}, MapStateData: { MapState:

{ proto_scripted_battle_0_0: 1, proto_scripted_battle_1_0: 1, proto_scripted_battle_2_0: 1, proto_scripted_battle_3_0: 1, proto_scripted_battle_4_0: 1, proto_scripted_battle_21_0: 1, proto_scripted_battle_23_0: 1, proto_scripted_battle_26_0: 1, proto_scripted_battle_29_0: 1, proto_scripted_battle_32_0: 1, proto_scripted_battle_pvp_0_1: 1, proto_scripted_battle_pvp_0_2: 1 }

}, MissionDataFinished: {}, id: "UserData:b1c027d0ee8f273a7fd8b373" } } nscanned:1 nscannedObjects:1 nMatched:1 nModified:1 keyUpdates:0 writeConflicts:0 numYields:0 locks:{ Global: { acquireCount:

{ r: 2, w: 2 }

}, MMAPV1Journal: { acquireCount:

{ w: 3 }

, acquireWaitCount:

{ w: 1 }

, timeAcquiringMicros:

{ w: 351696 }

}, Database: { acquireCount:

{ w: 2 }

}, Collection: { acquireCount:

{ W: 1 }

, acquireWaitCount:

{ W: 1 }

, timeAcquiringMicros:

{ W: 5002 }

}, oplog: { acquireCount:

{ w: 1 }

} } 357ms