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Posted to users@tomcat.apache.org by Bob DeRemer <bo...@thingworx.com> on 2013/11/04 02:31:24 UTC
Can Tomcat 7 jsr-356 plumbing be configured to automatically send
websocket ping/pong on a specified interval?
During our testing of large scale websocket connections going through Amazon ELB, we've found that ELB will timeout idle TCP connections after 60 seconds. Our testing scenarios is one where we want to ramp up 10(s) of 1000s of websocket connections - then, after they are all connected, start them sending request/response messages for some specified duration.
To avoid ELB closing our connection, we'd like to see if we can configure the tomcat plumbing to automatically send ping(s) on some interval. And, the follow-up question: if we can have a ping being sent automatically, will the other end of the pipe respond with a pong?
Thanks,
Bob
http://www.thingworx.com<http://www.thingworx.com/>
Skype: bob.deremer.thingworx
O: 610.594.6200 x812
M: 717.881.3986
Re: Can Tomcat 7 jsr-356 plumbing be configured to automatically send
websocket ping/pong on a specified interval?
Posted by Niki Dokovski <ni...@gmail.com>.
On Mon, Nov 4, 2013 at 5:52 AM, Bob DeRemer <bo...@thingworx.com>wrote:
>
>
> > -----Original Message-----
> > From: Bob DeRemer [mailto:bob.deremer@thingworx.com]
> > Sent: Sunday, November 03, 2013 8:31 PM
> > To: Tomcat Users List
> > Subject: Can Tomcat 7 jsr-356 plumbing be configured to automatically
> send
> > websocket ping/pong on a specified interval?
> >
> > During our testing of large scale websocket connections going through
> Amazon
> > ELB, we've found that ELB will timeout idle TCP connections after 60
> seconds.
> > Our testing scenarios is one where we want to ramp up 10(s) of 1000s of
> > websocket connections - then, after they are all connected, start them
> sending
> > request/response messages for some specified duration.
> >
> > To avoid ELB closing our connection, we'd like to see if we can
> configure the
> > tomcat plumbing to automatically send ping(s) on some interval. And, the
> > follow-up question: if we can have a ping being sent automatically, will
> the
> > other end of the pipe respond with a pong?
>
Sending ping control frame is handled by the application entirely. The
container will not send those frames on its own. The other peer will
respond with a pong as described by WSC 2.2.5-1 [1] and WebSocket RFC [2]
> >
> > Thanks,
> > Bob
>
> FOLLOW-UP: will the Ping message be sent if an empty byte[] is passed, or
> must it contain at least 1 byte?
>
The payload of the ping control frame is optional, by definition.
> >
> > http://www.thingworx.com<http://www.thingworx.com/>
> > Skype: bob.deremer.thingworx
> > O: 610.594.6200 x812
> > M: 717.881.3986
>
>
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>
[1] JSR356 WebSocket for Java API http://jcp.org/en/jsr/detail?id=356
[2] RFC 6455 http://tools.ietf.org/html/rfc6455#section-5.5.2
RE: Can Tomcat 7 jsr-356 plumbing be configured to automatically
send websocket ping/pong on a specified interval?
Posted by Bob DeRemer <bo...@thingworx.com>.
> -----Original Message-----
> From: Bob DeRemer [mailto:bob.deremer@thingworx.com]
> Sent: Sunday, November 03, 2013 8:31 PM
> To: Tomcat Users List
> Subject: Can Tomcat 7 jsr-356 plumbing be configured to automatically send
> websocket ping/pong on a specified interval?
>
> During our testing of large scale websocket connections going through Amazon
> ELB, we've found that ELB will timeout idle TCP connections after 60 seconds.
> Our testing scenarios is one where we want to ramp up 10(s) of 1000s of
> websocket connections - then, after they are all connected, start them sending
> request/response messages for some specified duration.
>
> To avoid ELB closing our connection, we'd like to see if we can configure the
> tomcat plumbing to automatically send ping(s) on some interval. And, the
> follow-up question: if we can have a ping being sent automatically, will the
> other end of the pipe respond with a pong?
>
> Thanks,
> Bob
FOLLOW-UP: will the Ping message be sent if an empty byte[] is passed, or must it contain at least 1 byte?
>
> http://www.thingworx.com<http://www.thingworx.com/>
> Skype: bob.deremer.thingworx
> O: 610.594.6200 x812
> M: 717.881.3986
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