ROUTE cookie value changes unexpectedly.

[gattu sevalkar]

I have some long running processes in my app. Say uploading a list of 20k emails to db. I notice that the route cookie value changes after a long running session finishes and the user gets logged out becuase now the user is on different server.

I also noticed that sticky module does not respect the merge_slashes on directive. So http://example.com//a/xzy and http://example.com/a/ changes the value in route cookie. It does not add two cookies but just overwrites the cookie if the user cancels the operation. For eg: to print a page we have a link that pops up the printer dialogue if user cancels the dialog, cookie value changes and user gets logged out.

Any idea what can cause this?

[S. Goodman]

could you paste your complete upstream_config?

[gattu sevalkar]

Sure pasted below. I have also tried using max_fails=2 fail_timeout=30s.. still same behaviour.

upstream prod {
    sticky path=/d;
    keepalive 64;
    server web:8080 weight=2 ;
    server web1b:8080 weight=2 ;
    server web1c:8080 weight=2 ;
    server web2:8080 weight=1 ;
    server web3:8080 weight=1 ;
    server web4:8080 weight=1 ;
    server web5:8080 weight=1 ;
    server web6:8080 weight=1 ;
    server web7:8080 weight=1 ;
    server web8a:8080 weight=2 ;
    server web8b:8080 weight=2 ;
    server web8c:8080 weight=2 ;
    server web9a:8080 weight=2 ;
    server web9b:8080 weight=2 ;
    server web9c:8080 weight=2 ;
    server web10a:8080 weight=2 ;
    server web10b:8080 weight=2 ;
    server web10c:8080 weight=2 ;
}

[gattu sevalkar]

My nginx.conf is below

http {
    include       mime.types;
    default_type  application/octet-stream;
    client_max_body_size 20M;

    log_format  main  '$remote_addr - $server_port - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;
    variables_hash_max_size 1024;

    keepalive_timeout  90;
    merge_slashes on;

    gzip  on;
    gzip_min_length 1k;
    gzip_buffers 4 16k;
    gzip_http_version 1.1;
    gzip_comp_level 2;
    gzip_types text/plain application/x-javascript text/css application/xml *;
    gzip_vary on; 

    include servers-nginx.conf;
}

[S. Goodman]

do you experience this behavior always or just sometimes?

for the second issue: please note, we changed the way for the path - defaults, so maybe with the new version your problems are gone

[gattu sevalkar]

We see this too often.. I will try the new version and let you know.

[gattu sevalkar]

There is definitely some issue with

merge_slashes on;

The cookie is changing if there are multiple slashes. I tested this with new version also.