getblockcount timeout

[Zozor54]

Hi,
When i look in pool_error.log file i just see many error like that :

2018-03-20 20:12:14 (Thread 3) Error polling getblockcount {"code":"ETIMEDOUT","errno":"ETIMEDOUT","syscall":"connect","address":"127.0.0.1","port":18091}
2018-03-20 20:14:48 (Thread 1) Error polling on_getblockhash {"code":"ETIMEDOUT","errno":"ETIMEDOUT","syscall":"connect","address":"127.0.0.1","port":18091}

My pool works but i would like to understand these mistakes and try to fix them.

Someone could help me ?

Thanks