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Questions tagged [keep-alive]

29 questions
12
votes
1 answer

Haproxy - timeout http-request vs timeout http-keep-alive vs timeout server

I'm trying to wrap my head around how the haproxy options timeout http-request timeout http-keep-alive timeout server interact with each other. I'm running an Apache website on two app servers living behind a haproxy…
Mike Levy
  • 255
8
votes
3 answers

How filter only keep-alive packet with tcpdump

I need to analyze a traffic-dump on my network to check if all the PCs have enabled tcp keep-live features. I'm using tcpdump for that purpose. What I need to know is if there is a possibility to filter for only the keep-alive packets. On windows I…
enzo1959
  • 205
6
votes
1 answer

What's the difference between Nginx 'keepalive_time' and 'keepalive_timeout'?

In official Nginx docs a new directive added since v1.19.10 named keepalive_time 1h: Nginx keepalive_time Doc Limits the maximum time during which requests can be processed through one keep-alive connection. After this time is reached, the…
Mohamad Reza
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5
votes
1 answer

How do I confirm whether a particular Apache configuration directive is set?

How do I dynamically check/list a particular Apache configuration directive? I know that this can be checked manually from httpd.conf file, but is there any other way this can be confirmed/found from a running Apache server process? For example: In…
Gnanam
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4
votes
2 answers

Is it possible to tell nginx over fastcgi to pass a Connection: close header through unaltered?

TL;DR: How can I tell nginx from my php-fpm backend to a) send a "Connection: close" header and b) to not buffer my response? I have a set up running php-fpm behind nginx. In general, this works very well and I'm happy with it, but there are a few…
pilif
  • 638
3
votes
1 answer

Configure keep alive timeout on Jetty 6.1.19

How do you set the timeout on keep alive connections to the Jetty web server (in my case v6.1.19)? I would like to configure how long Jetty keeps connections open when a client requests keep alive. Currently it seems indefinite.
justinhj
  • 213
2
votes
2 answers

Is there a way to keep internet connection alive?

Im running linux and I have a task which runs only after midnight. The internet connection I use for this, goes offline if there's a period of inactivity and I want to keep the internet connection alive until midnight by some means (ex: putting it…
OverTheEdge
  • 123
2
votes
1 answer

Reducing HTTPS handshake by http-keepalive behind a load balancer - possible?

I have an api into which ill get quite a few requests in https. Since its restful, each time the api is sent , it requires a full ssl handshake. On enabling http-keepalive , the latency of the request is reduced greatly (first request takes same…
harveyslash
  • 129
2
votes
2 answers

Configuring nginx reverse proxy to send TCP keep alive packets to server

We have IIS servers in Azure behind load balancer. Load balancer has unconfigurable timeout of 4 minutes after which inactive connection is killed. We're trying to setup nginx as a reverse proxy to the IIS cluster described above. Everything works…
Sumrak
  • 205
2
votes
1 answer

Tuning tcp_keepalive_time for Node.js leak

I'm currently having a socket leak with my Node.js application. This bug is also posted here. I hope to fix this soon. CLOSE_WAIT and FIN_WAIT2 seem to be the major problem. Connections: 1662 ESTABLISHED: 238 CLOSE_WAIT: 770 FIN_WAIT1: …
Martin
  • 177
2
votes
1 answer

Apache 2.2: RewriteMap, ProxyPass interpolation and Keep-Alive

I have an Apache httpd used as a SSL reverse proxy frontend for a lot of backends. I compute the name of the backend from the path given by the user. e.g: https://myhostname.com/myaccount translates to http://myaccount.myhostname.com For this I use…
Julien
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2
votes
1 answer

Keep-Alive header not sent from Tomcat 5.5 http connector?

We're currently using a hardware load balancer, which then goes to Apache and that then goes to Tomcat 5.5 via the AJP connector. We've decided to dump apache for various reasons - In our current system it doesnt provide any advantage. However when…
Codek
  • 203
2
votes
0 answers

AWS ALB and HAProxy Keep-Alive header

Has any one come across this behavior? AWS ALB is sending traffic to HaProxy. HaProxy sets keep-alive header to 29 seconds. Client connected to ALB does not see this header. It can only see "Connection: keep-alive" header. Basically, ALB is…
Sameer Naik
  • 228
2
votes
1 answer

nginx: log which requests where done over the same keep-alive connection

Is there any way to create a custom log file, that allows to see which requests were handled in the same keep-alive session? I'd like to create some logs and to estimate how often new sessions are created and what typical live times a keep alive…
gelonida
  • 299
1
vote
1 answer

Why does Amazon recommends reading 'all data' as soon as possible during S3 download?

While reading up official documentation on Amazon S3 Java SDK, I found an interesting note: Your network connection remains open until you read all of the data or close the input stream. We recommend that you read the content of the stream as…
Juzer Ali
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1
2