What happens if you simplify the match string to only contain characters? Something like

>> sub_filter 'xxx' 'yyy';

Can it ever do a substitute?

Sent from my iPad

> On Jul 2, 2017, at 8:26 AM, Valentin V. Bartenev <vbart@nginx.com> wrote:
>
>> On Friday 30 June 2017 22:14:55 ptcell wrote:
>> I've built with the sub filter enabled and I'm finding it hangs requests if
>> there is a match. It is a very simple substitution/replace. I've
>> resorted to following the request in GDB and the sub module completes and
>> calls the next body filter (which in my case appears to be the charset
>> module). I have no other odd modules enabled other than using threads with
>> a thread pool size of two (shouldn't matter, right?). Pausing all the
>> threads in GDB shows no obvious place it is hanging.
>>
>> If I change the match string to something that doesn't match anything, the
>> request works fine.
>>
>> Here is my config:
>>
>> location / {
>> root html;
>> index index.html index.htm;
>> sub_filter '</title>' 'xxx</title>';
>> sub_filter_once on;
>> }
>>
>> nginx -V
>> nginx version: nginx/1.7.11
>> built by gcc 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)
>> configure arguments: --with-http_sub_module --with-debug --with-threads
>> --with-cc-opt='-O0 -g'
>>
>> Thanks!
>>
>
> This is very old version of nginx. First of all, you should update up to
> the supported version. There are a bunch of bugs have been fixed.
>
> wbr, Valentin V. Bartenev
>
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