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nginx + PHP-FPM (7.0) hangs on some requests
NGINX : Keep alive requests to static content ok - Keep alive requests to php-fpm requests hang until keepalive_timeout is reachedhow exactly does nginx/php-fpm process requests?PHP FPM state Finishing but never completesNginx PHP-FPM stops after connection timeoutWhat's the Relationship Between an nginx worker_process and PHP-FPMNGinX + PHP-FPM Microservices deadlockNginx and PHP-FPM concurrent requests from same IPNginx / PHP-FPM hanging connectionsnginx + php5-fpm: Resource temporarily unavailablePeriodically 504 timeout with nginx and php-fpm
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I'm experiencing a weird issue with nginx + PHP-FPM hosted web app build with Symfony2. Basically, from time to time, there's a request that is not handled, instead the browser shows that it's waiting to start receiving (the wheel in chrome is spinning counter-clockwise).
I have nothing in error logs there that would help me identify the issue, neither in app log itself (Symfony 2.8), nginx nor php-fpm logs.
What is weird is there's no timeout at all, which would suggest php-fpm didn't even receive that request (right?).
Perhaps there's anyone who did experience such issues before and may know the probable cause?
Should I provide anything that would seem relevant (config files?), please do not hesitate to ask in comments.
nginx php-fpm timeout hangs
asked Feb 21 '17 at 16:17
user401676user401676
162
add a comment |
I'm experiencing a weird issue with nginx + PHP-FPM hosted web app build with Symfony2. Basically, from time to time, there's a request that is not handled, instead the browser shows that it's waiting to start receiving (the wheel in chrome is spinning counter-clockwise).
I have nothing in error logs there that would help me identify the issue, neither in app log itself (Symfony 2.8), nginx nor php-fpm logs.
What is weird is there's no timeout at all, which would suggest php-fpm didn't even receive that request (right?).
Perhaps there's anyone who did experience such issues before and may know the probable cause?
Should I provide anything that would seem relevant (config files?), please do not hesitate to ask in comments.
nginx php-fpm timeout hangs
asked Feb 21 '17 at 16:17
user401676user401676
162
add a comment |
I'm experiencing a weird issue with nginx + PHP-FPM hosted web app build with Symfony2. Basically, from time to time, there's a request that is not handled, instead the browser shows that it's waiting to start receiving (the wheel in chrome is spinning counter-clockwise).
I have nothing in error logs there that would help me identify the issue, neither in app log itself (Symfony 2.8), nginx nor php-fpm logs.
What is weird is there's no timeout at all, which would suggest php-fpm didn't even receive that request (right?).
Perhaps there's anyone who did experience such issues before and may know the probable cause?
Should I provide anything that would seem relevant (config files?), please do not hesitate to ask in comments.
nginx php-fpm timeout hangs
asked Feb 21 '17 at 16:17
user401676user401676
162
I'm experiencing a weird issue with nginx + PHP-FPM hosted web app build with Symfony2. Basically, from time to time, there's a request that is not handled, instead the browser shows that it's waiting to start receiving (the wheel in chrome is spinning counter-clockwise).
I have nothing in error logs there that would help me identify the issue, neither in app log itself (Symfony 2.8), nginx nor php-fpm logs.
What is weird is there's no timeout at all, which would suggest php-fpm didn't even receive that request (right?).
Perhaps there's anyone who did experience such issues before and may know the probable cause?
Should I provide anything that would seem relevant (config files?), please do not hesitate to ask in comments.
nginx php-fpm timeout hangs
nginx php-fpm timeout hangs
asked Feb 21 '17 at 16:17
user401676user401676
162
asked Feb 21 '17 at 16:17
user401676user401676
162
asked Feb 21 '17 at 16:17
user401676user401676
162
asked Feb 21 '17 at 16:17
user401676user401676
162
asked Feb 21 '17 at 16:17
user401676user401676
162
162
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
I have the same issue. What I found is that if the process doesn't complete, then there are no log entries. So the request comes into nginx and is relayed to the upstream, php-fpm. php-fpm doesn't respond and nginx times out the upstream. php-fpm continues operating. So what I see processes building up over time stuck in flock() call. Looking at the stack, I found this was due to trying to obtain a file lock on a debug file. I suggest you check php-fpm's open files to see if anything is hung or running, lsof |grep php-fpm. Then use strace or gdb to debug the issue further.
In my case, I was calling file_put_contents with an exclusive lock, which, for whatever reason, PHP isn't able to get sometimes and just hangs, forever.
Backtrace
0 0x00007f03f7081a67 in flock () from target:/usr/lib/libc.so.6
1 0x000055db7b9ecae6 in ?? ()
2 0x000055db7b9e83ad in _php_stream_set_option ()
3 0x000055db7b93e78e in ?? ()
4 0x000055db7badf0a3 in execute_ex ()
5 0x000055db7bae6fad in zend_execute ()
6 0x000055db7ba34c65 in zend_execute_scripts ()
7 0x000055db7b9cfb89 in php_execute_script ()
8 0x000055db7b7a1543 in ?? ()
9 0x00007f03f6fbaf4a in __libc_start_main () from target:/usr/lib/libc.so.6
10 0x000055db7b7a230a in _start ()
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
add a comment |
Well NGINX its great, although it doesn't work out-of-the-box properly. You need some tuning. what have you done so far?
Look at this simple guide. There are many other parameters than those described here: https://www.nginx.com/blog/tuning-nginx/
The Backlog Queue
Worker Processes
Keepalive Connections
HTTP2
And much more... In my case i once had a problem like this and i solved by increasing my queue limit (Backlog Queue)
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
add a comment |
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2 Answers
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2 Answers
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I have the same issue. What I found is that if the process doesn't complete, then there are no log entries. So the request comes into nginx and is relayed to the upstream, php-fpm. php-fpm doesn't respond and nginx times out the upstream. php-fpm continues operating. So what I see processes building up over time stuck in flock() call. Looking at the stack, I found this was due to trying to obtain a file lock on a debug file. I suggest you check php-fpm's open files to see if anything is hung or running, lsof |grep php-fpm. Then use strace or gdb to debug the issue further.
In my case, I was calling file_put_contents with an exclusive lock, which, for whatever reason, PHP isn't able to get sometimes and just hangs, forever.
Backtrace
0 0x00007f03f7081a67 in flock () from target:/usr/lib/libc.so.6
1 0x000055db7b9ecae6 in ?? ()
2 0x000055db7b9e83ad in _php_stream_set_option ()
3 0x000055db7b93e78e in ?? ()
4 0x000055db7badf0a3 in execute_ex ()
5 0x000055db7bae6fad in zend_execute ()
6 0x000055db7ba34c65 in zend_execute_scripts ()
7 0x000055db7b9cfb89 in php_execute_script ()
8 0x000055db7b7a1543 in ?? ()
9 0x00007f03f6fbaf4a in __libc_start_main () from target:/usr/lib/libc.so.6
10 0x000055db7b7a230a in _start ()
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
add a comment |
I have the same issue. What I found is that if the process doesn't complete, then there are no log entries. So the request comes into nginx and is relayed to the upstream, php-fpm. php-fpm doesn't respond and nginx times out the upstream. php-fpm continues operating. So what I see processes building up over time stuck in flock() call. Looking at the stack, I found this was due to trying to obtain a file lock on a debug file. I suggest you check php-fpm's open files to see if anything is hung or running, lsof |grep php-fpm. Then use strace or gdb to debug the issue further.
In my case, I was calling file_put_contents with an exclusive lock, which, for whatever reason, PHP isn't able to get sometimes and just hangs, forever.
Backtrace
0 0x00007f03f7081a67 in flock () from target:/usr/lib/libc.so.6
1 0x000055db7b9ecae6 in ?? ()
2 0x000055db7b9e83ad in _php_stream_set_option ()
3 0x000055db7b93e78e in ?? ()
4 0x000055db7badf0a3 in execute_ex ()
5 0x000055db7bae6fad in zend_execute ()
6 0x000055db7ba34c65 in zend_execute_scripts ()
7 0x000055db7b9cfb89 in php_execute_script ()
8 0x000055db7b7a1543 in ?? ()
9 0x00007f03f6fbaf4a in __libc_start_main () from target:/usr/lib/libc.so.6
10 0x000055db7b7a230a in _start ()
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
add a comment |
I have the same issue. What I found is that if the process doesn't complete, then there are no log entries. So the request comes into nginx and is relayed to the upstream, php-fpm. php-fpm doesn't respond and nginx times out the upstream. php-fpm continues operating. So what I see processes building up over time stuck in flock() call. Looking at the stack, I found this was due to trying to obtain a file lock on a debug file. I suggest you check php-fpm's open files to see if anything is hung or running, lsof |grep php-fpm. Then use strace or gdb to debug the issue further.
In my case, I was calling file_put_contents with an exclusive lock, which, for whatever reason, PHP isn't able to get sometimes and just hangs, forever.
Backtrace
0 0x00007f03f7081a67 in flock () from target:/usr/lib/libc.so.6
1 0x000055db7b9ecae6 in ?? ()
2 0x000055db7b9e83ad in _php_stream_set_option ()
3 0x000055db7b93e78e in ?? ()
4 0x000055db7badf0a3 in execute_ex ()
5 0x000055db7bae6fad in zend_execute ()
6 0x000055db7ba34c65 in zend_execute_scripts ()
7 0x000055db7b9cfb89 in php_execute_script ()
8 0x000055db7b7a1543 in ?? ()
9 0x00007f03f6fbaf4a in __libc_start_main () from target:/usr/lib/libc.so.6
10 0x000055db7b7a230a in _start ()
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
I have the same issue. What I found is that if the process doesn't complete, then there are no log entries. So the request comes into nginx and is relayed to the upstream, php-fpm. php-fpm doesn't respond and nginx times out the upstream. php-fpm continues operating. So what I see processes building up over time stuck in flock() call. Looking at the stack, I found this was due to trying to obtain a file lock on a debug file. I suggest you check php-fpm's open files to see if anything is hung or running, lsof |grep php-fpm. Then use strace or gdb to debug the issue further.
In my case, I was calling file_put_contents with an exclusive lock, which, for whatever reason, PHP isn't able to get sometimes and just hangs, forever.
Backtrace
0 0x00007f03f7081a67 in flock () from target:/usr/lib/libc.so.6
1 0x000055db7b9ecae6 in ?? ()
2 0x000055db7b9e83ad in _php_stream_set_option ()
3 0x000055db7b93e78e in ?? ()
4 0x000055db7badf0a3 in execute_ex ()
5 0x000055db7bae6fad in zend_execute ()
6 0x000055db7ba34c65 in zend_execute_scripts ()
7 0x000055db7b9cfb89 in php_execute_script ()
8 0x000055db7b7a1543 in ?? ()
9 0x00007f03f6fbaf4a in __libc_start_main () from target:/usr/lib/libc.so.6
10 0x000055db7b7a230a in _start ()
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
edited Jun 14 '18 at 13:11
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
answered Jun 14 '18 at 13:01
Derek LabianDerek Labian
112
112
add a comment |
add a comment |
Well NGINX its great, although it doesn't work out-of-the-box properly. You need some tuning. what have you done so far?
Look at this simple guide. There are many other parameters than those described here: https://www.nginx.com/blog/tuning-nginx/
The Backlog Queue
Worker Processes
Keepalive Connections
HTTP2
And much more... In my case i once had a problem like this and i solved by increasing my queue limit (Backlog Queue)
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
add a comment |
Well NGINX its great, although it doesn't work out-of-the-box properly. You need some tuning. what have you done so far?
Look at this simple guide. There are many other parameters than those described here: https://www.nginx.com/blog/tuning-nginx/
The Backlog Queue
Worker Processes
Keepalive Connections
HTTP2
And much more... In my case i once had a problem like this and i solved by increasing my queue limit (Backlog Queue)
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
add a comment |
Well NGINX its great, although it doesn't work out-of-the-box properly. You need some tuning. what have you done so far?
Look at this simple guide. There are many other parameters than those described here: https://www.nginx.com/blog/tuning-nginx/
The Backlog Queue
Worker Processes
Keepalive Connections
HTTP2
And much more... In my case i once had a problem like this and i solved by increasing my queue limit (Backlog Queue)
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
Well NGINX its great, although it doesn't work out-of-the-box properly. You need some tuning. what have you done so far?
Look at this simple guide. There are many other parameters than those described here: https://www.nginx.com/blog/tuning-nginx/
The Backlog Queue
Worker Processes
Keepalive Connections
HTTP2
And much more... In my case i once had a problem like this and i solved by increasing my queue limit (Backlog Queue)
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
answered Jun 14 '18 at 14:16
lucasmxlucasmx
3921212
3921212
add a comment |
add a comment |
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