I got the same error:
2017-12-23 16:17:02| Message Type : Error
LSK/ETH Error Lookup Exception : null
java.lang.NullPointerException
at CAT.C_Env_Market.C_Executor.PPOrderCalculator.DOW_EXT.getReferencePrice(Unknown Source)
at CAT.C_Env_Market.C_Executor.PPOrderCalculator.PPST_PRICE.calculateOrderPrice(Unknown Source)
at CAT.C_Env_Market.C_Executor.PPOrderCalculator.ORDER_BRAIN.a(Unknown Source)
at CAT.C_Env_Market.C_Executor.PPOrderCalculator.ORDER_BRAIN.recalculateOrder(Unknown Source)
at CAT.D_Struct.PingPong_Level.PPOrder.tryRecalculate(Unknown Source)
at CAT.C_Env_Market.B_ManagersStatic.PPOrdersManager.checkAllOrderStructures(Unknown Source)
at CAT.C_Env_Market.A_MainMarket.PPPingPongAlgo.startLookup(Unknown Source)
at CAT.C_Env_Market.A_MainMarket.PPAlgoManager.b(Unknown Source)
at CAT.C_Env_Market.A_MainMarket.a.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
2017-12-23 16:17:02| Message Type : Error
Error From Market LSK/ETH : PPM : Exception in PPAlgoManager Lookup error is : null
At the coin:
2017-12-23 16:15:01| ---------------------------------------------------
2017-12-23 16:15:01| BSP : Ping Buy Order Creation Active : true
2017-12-23 16:15:01| BSP : Ping Sell Order Creation Active : true
2017-12-23 16:15:01| PPA : Pong Buy Creation Active : true
2017-12-23 16:15:01| PPA : Pool Sell Creation Active : true
2017-12-23 16:15:01| PPM : Pending User Operations Are Runnings, Current Lookup Discarded
2017-12-23 16:15:41| PPA : Lookup 1 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02912700/B:0.02870300
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:16:22| PPA : Lookup 2 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02934600/B:0.02890700
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:17:02| PPA : Lookup 3 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02934600/B:0.02891200
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:17:02| Dynamic-PING(CAT-253c/1321973) BUY
0.89@0.027995 Current 0.89 | Check For Recalculation
2017-12-23 16:17:02| *******************************************************************
* Error : PPM : Exception in PPAlgoManager Lookup error is : null *
*******************************************************************
2017-12-23 16:17:43| PPA : Lookup 4 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02934600/B:0.02877000
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:17:43| Dynamic-PING(CAT-253c/1321973) BUY
0.89@0.027995 Current 0.89 | Cannot Process Order (LOCK_BY_ALGO)
2017-12-23 16:18:23| PPA : Lookup 5 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02934600/B:0.02878200
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:18:23| Dynamic-PING(CAT-253c/1321973) BUY
0.89@0.027995 Current 0.89 | Cannot Process Order (LOCK_BY_ALGO)
2017-12-23 16:19:04| PPA : Lookup 6 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02934600/B:0.02879800
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:19:04| Dynamic-PING(CAT-253c/1321973) BUY
0.89@0.027995 Current 0.89 | Cannot Process Order (LOCK_BY_ALGO)
2017-12-23 16:19:44| PPA : Lookup 7 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02934600/B:0.02881300
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:19:44| Dynamic-PING(CAT-253c/1321973) BUY
0.89@0.027995 Current 0.89 | Cannot Process Order (LOCK_BY_ALGO)
2017-12-23 16:20:25| PPA : Lookup 8 Start. Update Market Orders,My Orders,My Trades. First Markets Checks Are Ok.
Current Personal Last Prices : S:N/A S_PI:N/A S_PO:N/A B:0.02799500 B_PI:0.02799500 B_PO:N/A Best Market Prices : S:0.02891200/B:0.02878300
Current Orders/Trades : 1 Ping, 0 Pong, 0 Trades From Ping, 0 Orders To Restore, Pool Values : Buy 0.00000000/Sell 0.00000000
2017-12-23 16:20:25| Dynamic-PING(CAT-253c/1321973) BUY
0.89@0.027995 Current 0.89 | Cannot Process Order (LOCK_BY_ALGO)
Are written on the console. CAT have already managed them.
In other words it's an error, but it's all ok.
Problem is when this error continue pops up.
When this can happens? Usually when the API Service start gives bad responses. Once it was the "maintenance" time. But during these days of heavy loads errors pop up faster than before.