Error while refreshing pending block on main

[mmitech]

I keep getting this error then the Unlocker and payments eventually stops working:

Error while refreshing pending block on main: Post http://127.0.0.1:8545: net/http: request canceled (Client.Timeout exceeded while awaiting headers)

[sammy007]

Http RPC request to geth failed with timeout. Check geth.

curl -X POST http://127.0.0.1:8545 -d '{"jsonrpc":"2.0","method":"eth_getWork","params":[],"id":0}'

[mmitech]

yes, when I do it manually I get a successful result:
{"jsonrpc":"2.0","id":0,"result":["0x2023daa9f5f82d6b8cb7bc47558c0fe92280ac9e2f7a0a39dca601631ad0c8da","0x95d53b63d0b531598853dfe1f1271a355a583c442d509d228ff92a2b0a0d801a","0x0000000000080b4c58b6f0c0ddff75735b1b8881fd0e64994050ca6946adc8b0"]}

but from watching the logs it fails few times which eventually effect unlocker and payouts

[sammy007]

This is issue with geth, connection to geth, etc. Pool just can't perform rpc request, happens sometimes. You need to run several in order to switch to a working one and backup when first node is ok.