I am currently running 1.5.12 and have been since it's release. On 25 June 2018 using the recurring transactions, invoices were mailed to ~20 tenants, all successfully sent and received (I am copied on them, so I know). Today 1 July, I successfully posted a number of checks (cash->receipts), after which I attempted to send "paid invoice emails". I received the following error message.
"Proxy Error
The proxy server received an invalid response from an upstream server. The proxy server could not handle the request /POST /ledgersmb/is.pl https://www.theotts.org/ledgersmb/is.pl/.
Reason: *Error reading from remote server"*
From the access_log:
192.168.0.240 - - [01/Jul/2018:09:57:10 -0400] "POST /ledgersmb/is.pl HTTP/1.1" 502 410 "https://www.theotts.org/ledgersmb/login.pl?action=login&company=SalemStr..." "Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0"
From the error_log:
[Sun Jul 01 09:58:10.822889 2018] [proxy_http:error] [pid 1380] (70007)The timeout specified has expired: [client 192.168.0.240:56182] AH01102: error reading status line from remote server localhost:5762, referer: https://www.theotts.org/ledgersmb/login.pl?action=login&company=SalemStr... [Sun Jul 01 09:58:10.822972 2018] [proxy:error] [pid 1380] [client 192.168.0.240:56182] AH00898: Error reading from remote server returned by /ledgersmb/is.pl, referer: https://www.theotts.org/ledgersmb/login.pl?action=login&company=SalemStr...
Current Centos OS level from uname -a:
Linux wbointi7.theotts.org 3.10.0-862.3.3.el7.x86_64 #1 SMP Fri Jun 15 04:15:27 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux **
Between 25 June and 1 July, the server hosting ledgersmb was updated, likely being the cause of the problem, but I have not found any issues I can attribute to this failure. Any help or suggestions are appreciated.