Detect websocket close event

[Eritiayn Hienoa]

Hello!

Here is the case:

I have nginx with pushstream module. When I send a lot of messages with high rate, my websocket connection closes and I lose some messages.

I found the reason: net.ipv4.tcp_wmem cache size.

But I want to log moment when websocket closes.

Please, help me to find that place in pushstream module source code.

In code it looks like this call cahin:

ngx_http_push_stream_process_worker_message
ngx_http_push_stream_process_worker_message_data

ngx_http_push_stream_respond_to_subscribers

and there in lines:

if (msg != NULL) {

// now let's respond to some requests!

for (q = ngx_queue_head(subscriptions); q != ngx_queue_sentinel(subscriptions);) {

subscriptions is empty. But I can't find where subscriptions were cleared

Please, help me