[1050 TH] BitMinter.com [1% PPLNS,Pays TxFees +MergedMining,Stratum,GBT,vardiff] - page 258.

DrHaribo

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Quote from: juhakall on December 20, 2012, 10:47:08 PM

Quote from: DrHaribo on December 20, 2012, 06:58:08 PM

juhakall, a 4/4 difficulty proof being rejected sounds strange.. I'll have a look at it. This was with Stratum?

Yes, that's with stratum.

The target is the exact same you mentioned previously, so the share should be accepted. Do you have the time when this happened? If so I'll have a look at the logs if there are any errors.

Maybe the data is mangled somehow, so when the server hashes it the share doesn't even meet diff 1.

juhakall

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Quote from: DrHaribo on December 20, 2012, 06:58:08 PM

juhakall, a 4/4 difficulty proof being rejected sounds strange.. I'll have a look at it. This was with Stratum?

Yes, that's with stratum.

DrHaribo

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bitcoind and namecoind both slowed down at the same time. There's some sort of issue there. Pool recovered after a couple of minutes though.

juhakall, a 4/4 difficulty proof being rejected sounds strange.. I'll have a look at it. This was with Stratum?

Equilux

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Website itself is up, but my client can't connect ...

juhakall

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Yeah, seems to be down.

miter_myles

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down?

juhakall

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I noticed an odd rejected share, using cgminer 2.10.2 & stratum:

Rejected 3fd895f5 Diff 4/4 GPU 1 pool 0 (Work below difficulty)

I only barely understand how share difficulties work, but I was told in #cgminer IRC channel that the target hash for diff4 should be 0x000000003fffc000. My rejected share hash was 0x000000003fd895f5, which is smaller than the target, so shouldn't it be accepted? I'm also aware of the discrepancy between "real" and actually used diff1 shares, which is explained here by kanoi. Could this be a similar problem, meaning that there's a disagreement between cgminer and BitMinter as to what actually is the target for a diff4 share?

DrHaribo

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Quote from: lenny_ on December 19, 2012, 11:41:51 AM

Stratum port 5050 seems to be down. Port 3333 working OK.

It's working for me. It's just a redirect, so 5050 and 3333 should be up/down at the same time.

lenny_

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DARKNETMARKETS.COM

Stratum port 5050 seems to be down. Port 3333 working OK.

DrHaribo

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Need to restart bitcoind and namecoind. They take a while to get up and running again, sorry for the delay..

MrTeal

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Quote from: organofcorti on December 18, 2012, 06:40:19 PM

Quote from: DrHaribo on December 18, 2012, 07:30:07 AM

.... although I hope not to see this type of behavior again.

Everyone says this about their child at some point Wink

I think I say this every day for my 2 year old.

DrHaribo

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Hall of fame is on my list.

Quote from: LazyOtto on December 18, 2012, 10:47:13 PM

I had eight shifts with zero or near zero scores.

Could be because your miner stayed at a backup pool or that it crashed when it was disconnected by the server. Some miner programs have been having those issues lately.

LazyOtto

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So you did something to resume 'normal' / getwork processing?

I had eight shifts with zero or near zero scores.

organofcorti

donator

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Poor impulse control.

Quote from: DrHaribo on December 18, 2012, 07:30:07 AM

.... although I hope not to see this type of behavior again.

Everyone says this about their child at some point Wink

loshia

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Quote from: DrHaribo on December 18, 2012, 07:30:07 AM

Turbor, your explanation is as good as any I can come up with.

Any recent kernel upgrade of the pool? If yes just go back to old one Wink

lenny_

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DrHaribo, what you think about implementing Hall of Fame (users who found most amount of blocks) like in Slush pool?

http://mining.bitcoin.cz/stats/hall-of-fame/

DrHaribo

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Turbor, your explanation is as good as any I can come up with.

Looks like all I/O got slower and slower. After a while some getwork requests took 5 minutes. The database connections terminated with "end of file" and it was impossible to establish new ones. syslog tells me the web server got stuck for over 120 seconds waiting for a page from disk. But there is nothing wrong with the disks. The pool server had several hundred thousand closed connections that somehow the kernel stopped clearing away. The load was 25-30 with almost no cpu usage. Apparently all these processes were waiting on IO. I could still send a request to bitcoind or namecoind and it would register in their logs but no response would come out. After restarting each process everything is fine. It's like the kernel just wouldn't honor IO requests from the "old" processes. I've never seen anything like it.

So yes, maybe it was the ghost in the machine.

I'll be working on robustness and automatic recovery, although I hope not to see this type of behavior again.

Turbor

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