This is a private blockchain project and we are connecting to a private pool. I was thinking there is something in the pool causing it, but that's hard to confirm. This set of 4 miners was just replaced due to a similar problem, but they would not reconnect. I think the original miners were hacked since the passwords were changed, and the factory reset was disabled. Again that is hard to substantiate. Any other ideas? Thanks in advance for all your help.

Greetings all. New forum member, recently purchased 4 Antminer V9's with APW3++ power supplies. I have them in a colo data center running 220v and ALL have a similar problem. The V9's are running Linux 4.6.0-xilinx-gff8137b-dirty #22 SMP PREEMPT Fri Dec 22 12:25:44 CST 2017 and CGMiner 4.9.0. I've heard the V9 is a clone of the S9, so I'm hoping this thread can help me resolve the problem.

I have an issue where the miners become disconnected from Awesome Miner V5.3.1, and when I go into the web interface, the System/Overview has no data, but has the data field names, and the Miner Status is the same, no data but has data field names. I can ping them and they respond, but won't connect. I have been rebooting them to resolve this, and they connect within a few minutes, and remain hashing, for various timeframes. Sometimes they disconnect in a few hours, but in most instances they will disconnect right at 8:45 minutes of uptime.

I can see the kernel log, when it is in this state, and most of the time it leaves this as the last entry 'Jul 14 16:20:59 (none) local0.err cgminer[955]: cgminer time error total_secs = 1531585179.097935 last_total_secs = 889.864640'. I've researched and can't find alot of info on this, whether it is an error or not. It is the only entry in the Kernel Log with the correct date/time. This just happened again while researching and all 4 miners went 'disconnected' at the same time. This Kernel Log error did not appear in this last entry.  I had the colo data center check the network and they say there were no problems at the time these problems happened that could have caused these disconnects.

I would really appreciate any insight into this problem, and/or suggestions to resolve it.