Error Filling http.log directory in UTM 9

Question

I have a ticket open with Sophos Support, but thought I would put it out to the support community also. After the latest update (9.510-5), we started filling our http.log file with the following error: 
 2018:08:30-08:44:20 ansophos httpproxy[5511]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0x3539ca00" function="read_winbindd_response" file="auth_adir.c" line="239" message="epoll_read_until: Transport endpoint is not connected" 
 Has anyone seen this before? I have removed he UTM from the domain and rejoined it but it still has not resolved the issue.

LuCar Toni · Answer

Mh. 
 Are there only those log entries or couple of other? Do you experience any issues? 
 Because if you disable the logging of allow / denied web requests in GUI, the HTTP.log will only log such "errors", which are quite normal on UTM9. This can be confusing and is a common mistake, but those log entries seems to be normal. Do you have another UTM with Web protection? You can check the other UTM with a basic grep and wc -l command. 
 Can you also post the size of your http.log? 
 The UTM gets unresponsive because of a "plain log file" seems to be unnaturally. Maybe you have another issue? 
 Can you check, if those log entries also be there on older log files?

LuCar Toni · Answer

In this case, you should go with the Sophos Support to get this analyzed.