i have one (sometime an other one) miner that stop mining after a day or 2 (never mine more that 2 days without stop)
nothing wrong with internet connection or pool, other miner working fine
m 20:30:26|main Mining on PoWhash #816986d5 : 86.51MH/s [A4724+87:R1+0:F9]
m 20:30:28|main Mining on PoWhash #816986d5 : 87.16MH/s [A4724+87:R1+0:F9]
i 20:30:30|stratum Received new job #5801
i 20:30:30|openclminer0 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:30|openclminer1 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:30|openclminer2 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:30|openclminer3 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:31|openclminer4 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:31|openclminer5 set work; seed: #8f602dc7, target: #00000002aa1abc50
m 20:30:31|main Mining on PoWhash #11f8f0a1 : 6.55MH/s [A4724+87:R1+0:F9]
m 20:30:33|main Mining on PoWhash #11f8f0a1 : 84.54MH/s [A4724+87:R1+0:F9]
m 20:30:35|main Mining on PoWhash #11f8f0a1 : 86.51MH/s [A4724+87:R1+0:F9]
i 20:30:35|stratum No new work received in 180 seconds.
i 20:30:35|stratum Reconnecting in 3 seconds...
i 20:30:36|stratum Received new job #5802
i 20:30:36|stratum No new work received in 180 seconds.
m 20:30:39|main Mining on PoWhash #42a5001a : 0.00MH/s [A4724+87:R1+0:F9]
i 20:30:36|stratum No new work received in 180 seconds.
i 20:30:38|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:30:39|openclminer5 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:36|stratum No new work received in 180 seconds.
i 20:30:36|openclminer1 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:37|openclminer2 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:31:17|stratum Reconnecting in 3 seconds...
i 20:30:36|openclminer0 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:30:36|stratum No new work received in 180 seconds.
i 20:30:39|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
i 20:30:37|openclminer3 set work; seed: #8f602dc7, target: #00000002aa1abc50
m 20:37:15|main Mining on PoWhash #42a5001a : 6.37MH/s [A4724+87:R1+0:F9]
i 20:39:19|stratum Received new job #5828
i 20:30:39|stratum Received new job #5809
i 20:30:36|stratum No new work received in 180 seconds.
i 20:30:36|stratum No new work received in 180 seconds.
i 20:41:08|openclminer1 set work; seed: #8f602dc7, target: #0000000225c17d04
i 20:30:38|openclminer4 set work; seed: #8f602dc7, target: #00000002aa1abc50
i 20:32:52|stratum Reconnecting in 3 seconds...
i 20:41:09|openclminer2 set work; seed: #8f602dc7, target: #0000000225c17d04
i 20:44:40|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:44:10|openclminer4 set work; seed: #8f602dc7, target: #0000000225c17d04
i 20:35:16|stratum Reconnecting in 3 seconds...
i 20:41:10|openclminer3 set work; seed: #8f602dc7, target: #0000000225c17d04
i 20:38:27|stratum Reconnecting in 3 seconds...
i 20:41:07|openclminer0 set work; seed: #8f602dc7, target: #0000000225c17d04
i 20:47:16|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
i 20:44:40|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
i 20:42:08|stratum Reconnecting in 3 seconds...
i 20:42:41|stratum Reconnecting in 3 seconds...
i 20:37:13|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:47:16|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:51:08|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
i 20:51:08|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:49:53|openclminer4 Solution found; Submitting to europe1.ethereum.miningpoolhub.com ...
i 20:30:36|stratum No new work received in 180 seconds.
i 20:48:16|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:54:56|openclminer4 Nonce: 0x7af13ddf221d93f7
i 20:55:24|stratum Reconnecting in 3 seconds...
i 20:48:16|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
i 20:56:57|stratum Connecting to stratum server europe1.ethereum.miningpoolhub.com:20535
i 20:49:31|stratum Received new job #5829
i 20:56:59|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
X 20:53:29|stratum Parse response failed: * Line 1, Column 249
Missing ',' or ']' in array declaration
i 20:50:41|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
i 20:59:56|stratum Received new job #5881
i 20:39:25|openclminer5 Solution found; Submitting to europe1.ethereum.miningpoolhub.com ...
i 20:37:13|stratum Connected to stratum server europe1.ethereum.miningpoolhub.com : 20535
X 20:56:31|openclminer4 Submitting stale solution.
i 21:01:51|openclminer1 Solution found; Submitting to europe1.ethereum.miningpoolhub.com ...
i 21:01:21|openclminer5 Nonce: 0x049220ff2f00eea6
i 21:01:55|stratum B-) Submitted and accepted.
X 20:50:13|stratum Parse response failed: * Line 1, Column 237
Missing ',' or ']' in array declaration
m 21:03:21|main Mining on PoWhash #5754
so i close the miner and start again and it s runing till next stop
there is not firewall on computer, so cannot be that, only windows security essential and is disable
and sometime same stuff happen on the other miner, and i think computer is some slow when it happen, i use ultravnc
it take some time to close the cmd window