ERROR: CheckBlockHeader() strikes again!

Wellenreiter

I had my sgminer running for 39 minutes and no rejected shares at all.
Unfortunately I can’t get nsgminer working for neoscrypt on m system

update:

[17:18:44] Accepted 03da6390 Diff 0.260/0.153 GPU 0
[17:18:51] Accepted 02722cb1 Diff 0.409/0.153 GPU 0
[17:18:55] Accepted 014793ef Diff 0.781/0.153 GPU 0
[17:18:56] Accepted 039c1fed Diff 0.277/0.153 GPU 0
[17:18:57] Accepted 5510c1cb Diff 3.009/0.153 GPU 0
[17:19:02] Accepted 04d96299 Diff 0.206/0.153 GPU 0
[17:19:09] Accepted 05816d09 Diff 0.256/0.153 GPU 0
[17:19:13] Stratum connection to cryptogrinder.com interrupted
[17:19:13] cryptogrinder.com difficulty changed to 0.153
[17:19:18] Rejected 04bdd5b9 Diff 0.211/0.153 GPU 0
[17:19:20] Rejected 02651b9a Diff 0.418/0.153 GPU 0
[17:19:21] Rejected 03fd38c4 Diff 0.251/0.153 GPU 0
[17:19:23] Stratum connection to cryptogrinder.com interrupted
[17:19:23] cryptogrinder.com difficulty changed to 0.153
[17:19:28] Accepted 04fdf0b9 Diff 0.200/0.153 GPU 0
[17:19:34] Stratum connection to cryptogrinder.com interrupted
[17:19:34] cryptogrinder.com difficulty changed to 0.153
[17:19:42] Accepted 01a06e94 Diff 0.615/0.153 GPU 0
[17:19:42] Stratum connection to cryptogrinder.com interrupted
[17:19:42] cryptogrinder.com difficulty changed to 0.153

as you can see there are some rejected shares after an interrupted stratum connection.

My miner reports a rejection rate of 11.5% and your pool node reports a DOA of ~39%

Connection interruptions can be caused by the host you are running your p2pool node on, or connectivity problems to the pool node.

Wellenreiter

I just compared your p2pool version with the latest one on github, which is

v15.0-28-g6d59072

can you pull the latest version, do a ‘git checkout master’

and restart your pool?

There are some fixes in the latest version.

Wellenreiter

Stopped my miner now.

Final Statictics:

[17:33:32] Started at [2017-09-14 16:57:26]                    
[17:33:32] Pool: stratum+tcp://cryptogrinder.com:19327                    
[17:33:32] Runtime: 0 hrs : 36 mins : 6 secs                    
[17:33:32] Average hashrate: 2.4 Kilohash/s                    
[17:33:32] Solved blocks: 0                    
[17:33:32] Best share difficulty: 54                    
[17:33:32] Share submissions: 528                    
[17:33:32] Accepted shares: 434                    
[17:33:32] Rejected shares: 94                    
[17:33:32] Accepted difficulty shares: 67                    
[17:33:32] Rejected difficulty shares: 15                    
[17:33:32] Reject ratio: 17.8%                    
[17:33:32] Hardware errors: 0                    
[17:33:32] Utility (accepted shares / min): 12.03/min                    
[17:33:32] Work Utility (diff1 shares solved / min): 2.24/min
                
[17:33:32] Stale submissions discarded due to new blocks: 2                    
[17:33:32] Unable to get work from server occasions: 117                    
[17:33:32] Work items generated locally: 1823                    
[17:33:32] Submitting work remotely delay occasions: 2                    
[17:33:32] New blocks detected on network: 35

I think the reason for the high rejection rate are the interruptions miner to p2pool connection

cryptogrinder

pulled… restarted… here’s my output before restart:

[17:28:28] Stratum from pool 0 detected new block
[17:28:33] Rejected 64915371FFA30300x0 Diff 0.017/0.010 OCL 0
[17:28:35] Rejected 89FEF1681A1E0100x0 Diff 0.056/0.010 OCL 0
[17:28:36] The network difficulty has been set to 55348
[17:28:36] Stratum from pool 0 detected new block
[17:28:41] Rejected DB8E21281D3F0300x0 Diff 0.019/0.010 OCL 0
[17:28:42] Rejected B7D87F8A64E20500x0 Diff 0.011/0.010 OCL 0
[17:28:43] Rejected 2876E7D0C6F00000x0 Diff 0.066/0.010 OCL 0
[17:28:44] Rejected 8C5969D1C1200100x0 Diff 0.055/0.010 OCL 0
[17:28:44] Rejected 1D5183AA96410400x0 Diff 0.015/0.010 OCL 0
[17:28:45] Rejected 1BC0FD6F45F30300x0 Diff 0.016/0.010 OCL 0
[17:28:47] Rejected A1D2B7B2F4B20200x0 Diff 0.023/0.010 OCL 0
[17:28:47] Rejected CF5594B850070400x0 Diff 0.016/0.010 OCL 0
[17:28:48] Rejected D1100987CB250300x0 Diff 0.020/0.010 OCL 0
[17:28:48] Rejected 05052BE82C6C0100x0 Diff 0.044/0.010 OCL 0
[17:28:50] Rejected 04DE72E307800500x0 Diff 0.011/0.010 OCL 0
[17:28:50] Rejected E889072CFD9A0100x0 Diff 0.039/0.010 OCL 0
[17:28:52] Rejected 801262238E7B0500x0 Diff 0.011/0.010 OCL 0
[17:28:52] Rejected 8552131FF24A0000x0 Diff 0.213/0.010 OCL 0
[17:28:52] Rejected 1E43E92F84950400x0 Diff 0.014/0.010 OCL 0
[17:28:53] Rejected 1E1F61E97F1B0000x0 Diff 0.582/0.010 OCL 0
[17:28:53] Rejected 662F697BC92C0400x0 Diff 0.015/0.010 OCL 0
[17:28:54] Rejected 6ECAF47D541F0500x0 Diff 0.012/0.010 OCL 0
[17:28:54] Rejected F89EBF7D47BC0300x0 Diff 0.017/0.010 OCL 0
[17:28:55] Rejected DB862625BB020000x0 Diff 5.859/0.010 OCL 0
[17:28:55] Rejected 4424037FD01D0100x0 Diff 0.056/0.010 OCL 0
[17:28:57] Rejected 2FB7B6CB9EEB0500x0 Diff 0.011/0.010 OCL 0
[17:28:58] Rejected 98694B70E4200200x0 Diff 0.029/0.010 OCL 0
[17:28:58] Rejected 9047B9F2671C0000x0 Diff 0.563/0.010 OCL 0
[17:29:00] Rejected DC08286149C40100x0 Diff 0.035/0.010 OCL 0
[17:29:00] Rejected 9529270E5CB40200x0 Diff 0.023/0.010 OCL 0
[17:29:00] Rejected 563DE2657EB10300x0 Diff 0.017/0.010 OCL 0
[17:29:01] Rejected 553CF08427280400x0 Diff 0.015/0.010 OCL 0
[17:29:01] Rejected 52E92E4A92AE0300x0 Diff 0.017/0.010 OCL 0
[17:29:01] Rejected FB0A25159E480400x0 Diff 0.015/0.010 OCL 0
[17:29:02] Rejected DEE3E2C8683E0400x0 Diff 0.015/0.010 OCL 0
[17:29:02] Rejected B45C8DE51D6A0100x0 Diff 0.044/0.010 OCL 0
[17:29:02] Rejected 0EB30803A0CC0000x0 Diff 0.078/0.010 OCL 0
[17:29:02] Rejected AFA2AF7E0EF10300x0 Diff 0.016/0.010 OCL 0
[17:29:03] Rejected FE281D4A5EF30100x0 Diff 0.032/0.010 OCL 0
[17:29:03] Rejected 0AFBE293EB750400x0 Diff 0.014/0.010 OCL 0
[17:29:04] The network difficulty has been set to 63537
[17:29:04] Stratum from pool 0 detected new block
[17:29:10] Accepted 566A2FC054A10400x0 Diff 0.013/0.012 OCL 0
[17:29:10] Accepted 1A54F903102C0100x0 Diff 0.053/0.012 OCL 0
[17:29:10] Accepted 97951872BB360400x0 Diff 0.015/0.012 OCL 0
[17:29:11] Accepted EF5C70D3BC0E0200x0 Diff 0.030/0.012 OCL 0
[17:29:11] Accepted 5A4A97B8BCEF0300x0 Diff 0.016/0.012 OCL 0
[17:29:15] Pool 0 stale share detected, submitting as user requested
[17:29:15] Pool 0 stratum share submission failure
[17:29:15] The network difficulty has been set to 68076
[17:29:15] Stratum from pool 0 detected new block
[17:29:21] Pool 0 communication resumed, submitting work
[17:29:21] Rejected 5EFFC0A751EF0000x0 Diff 0.067/0.014 OCL 0
[17:29:21] Rejected 7BB750DF7FF60200x0 Diff 0.021/0.014 OCL 0
[17:29:23] Rejected EE9F27C7CC280300x0 Diff 0.020/0.014 OCL 0
[17:29:25] Rejected 1E7ED1DDEC440000x0 Diff 0.232/0.014 OCL 0
[17:29:27] Rejected D9CD224D743C0200x0 Diff 0.028/0.014 OCL 0
[17:29:28] Rejected A6CF638C84610400x0 Diff 0.014/0.014 OCL 0
[17:29:28] Rejected 581008EECD660400x0 Diff 0.014/0.014 OCL 0
[17:29:30] Rejected CD90DDA16E450000x0 Diff 0.230/0.014 OCL 0
[17:29:31] Rejected A456B62B00F70200x0 Diff 0.021/0.014 OCL 0
[17:29:35] Thread 0 being disabled U:0.03/m
[17:29:36]
Summary of runtime statistics:

[17:29:36] Started at [2017-09-14 17:26:55]
[17:29:36] Pool: http://cryptogrinder.com:19327
[17:29:36] Run time: 0 hrs 2 mins 40 secs
[17:29:36] Average hash rate: 0.0083 MH/s
[17:29:36] Solved blocks: 0
[17:29:36] Best share difficulty: 6
[17:29:36] Queued work requests: 11
[17:29:36] Share submissions: 139
[17:29:36] Accepted shares: 6
[17:29:36] Rejected shares: 133
[17:29:36] Accepted diff1 shares: 0
[17:29:36] Rejected diff1 shares: 1
[17:29:36] Reject ratio: 95.7%
[17:29:36] Hardware errors: 0
[17:29:36] Efficiency (accepted shares * difficulty / 2 KB): 0.00
[17:29:36] Utility (accepted shares / min): 0.00/min
[17:29:36] Work Utility (diff1 shares accepted / min): 0.00/min

[17:29:36] Discarded work due to new blocks: 0
[17:29:36] Stale submissions discarded due to new blocks: 1
[17:29:36] Unable to get work from server occasions: 9
[17:29:36] Work items generated locally: 50
[17:29:36] Submitting work remotely delay occasions: 1
[17:29:36] New blocks detected on network: 10

cryptogrinder

after restart and git pull the dao seems very low again

cryptogrinder

based on output it’s fine now… :) so thanks a lot. but not sure what was the problem… ?!

Summary of runtime statistics:

[12:39:24] Started at [2017-09-15 11:48:54]
[12:39:24] Pool: http://cryptogrinder.com:19327
[12:39:24] Run time: 0 hrs 50 mins 29 secs
[12:39:24] Average hash rate: 0.0117 MH/s
[12:39:24] Solved blocks: 0
[12:39:24] Best share difficulty: 28
[12:39:24] Queued work requests: 213
[12:39:24] Share submissions: 2981
[12:39:24] Accepted shares: 2963
[12:39:24] Rejected shares: 18
[12:39:24] Accepted diff1 shares: 33
[12:39:24] Rejected diff1 shares: 0
[12:39:24] Reject ratio: 0.6%
[12:39:24] Hardware errors: 0
[12:39:24] Efficiency (accepted shares * difficulty / 2 KB): 0.05
[12:39:24] Utility (accepted shares / min): 0.02/min
[12:39:24] Work Utility (diff1 shares accepted / min): 0.00/min

[12:39:24] Discarded work due to new blocks: 417
[12:39:24] Stale submissions discarded due to new blocks: 0
[12:39:24] Unable to get work from server occasions: 0
[12:39:24] Work items generated locally: 832
[12:39:24] Submitting work remotely delay occasions: 0
[12:39:24] New blocks detected on network: 47

Wellenreiter

@cryptogrinder said in ERROR: CheckBlockHeader() strikes again!:

but not sure what was the problem… ?!

It was a bug in the adaptive behavior of the p2pool software.

coutinho

This post is deleted!

cryptogrinder

@coutinho thanks for the info… very very helpful for ftc

@Wellenreiter just send you 100ftc as an appreciation… not much but at least smthng

Wellenreiter

@cryptogrinder

Many thanks :)

You also helped the community by bringing up the problem and verifying that the problem is fixed in the last p2pool code, so it’s on me to thank you.