Re: Solr running on Tomcat

[Erick Erickson <er...@gmail.com>]

Why to you think Solr on Tomcat == scalability?

Solr has not been distributed as a war file for some time, see:
https://wiki.apache.org/solr/WhyNoWar Just run it as a server.
Eventually it won't even use Jetty, but something like Netty etc....

Best,
Erick

On Thu, Feb 15, 2018 at 7:54 PM, GVK Prasad <gv...@yahoo.com.invalid> wrote:
>
> I read some posts on setting up Solr to Run on Tomcat. But all these posts are about Solr version 4.0 or earlier.
> I am thinking of hosting  Solr on Tomcat for scalability.
> Any recommendation on this.
>
> Prasad
>
>
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus

RE: Solr running on Tomcat

[GVK Prasad <gv...@yahoo.com.INVALID>]

Hello Eric, 
My assumption was hosting on Jetty may not work for production and higher performance systems needs and we have to go for Servers like Tomcat.  If it is not supported with latest version not sure how it will help us. Thanks for clarification.

Regards, 
Prasad

From: Erick Erickson
Sent: Thursday, February 15, 2018 11:08 PM
To: solr-user
Subject: Re: Solr running on Tomcat

Why to you think Solr on Tomcat == scalability?

Solr has not been distributed as a war file for some time, see:
https://wiki.apache.org/solr/WhyNoWar Just run it as a server.
Eventually it won't even use Jetty, but something like Netty etc....

Best,
Erick

On Thu, Feb 15, 2018 at 7:54 PM, GVK Prasad <gv...@yahoo.com.invalid> wrote:
>
> I read some posts on setting up Solr to Run on Tomcat. But all these posts are about Solr version 4.0 or earlier.
> I am thinking of hosting  Solr on Tomcat for scalability.
> Any recommendation on this.
>
> Prasad
>
>
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus

Re: Solr running on Tomcat

[Shawn Heisey <el...@elyograg.org>]

On 2/17/2018 9:27 PM, GVK Prasad wrote:
> My assumption was hosting on Jetty may not work for production and higher performance systems needs and we have to go for Servers like Tomcat.  If it is not supported with latest version not sure how it will help us. Thanks for clarification.

It is probably possible to still run Solr in Tomcat.  I can't find 
anything outside of tests and the embedded server that explicitly uses 
Jetty classes -- so the application should work properly in most servlet 
containers, as long as there aren't dependency conflicts with Solr's 
large list of dependencies, which are a problem for some containers.

Because official support has been removed for all containers other than 
Jetty, it is possible that at some point in the future Solr *will* 
explicitly use libraries from Jetty, and if that happens, then running 
in any other container will not work.  If whatever feature is being 
developed can be done with container-agnostic code, that will be preferred.

The Jetty install that ships with Solr has been adjusted a little bit 
for Solr's needs.  It is likely that a Tomcat install would require some 
config changes if it needs to scale very much.

=======

A little company you might have heard of (Google) needed a servlet 
container for something they were working on, currently known as Google 
App Engine.

Initially, they were running Tomcat.  But after a while (no idea how 
long) they switched to Jetty.

https://www.infoq.com/news/2009/08/google-chose-jetty

If there was any concern about Jetty's performance compared to the 800 
pound gorilla that Tomcat is in its space, Google wouldn't be using it.  
They care a great deal about things like memory usage and modularity, 
but they wouldn't switch if they couldn't get similar (or better) 
performance.

Jetty is used by a LOT of other programs.  Here's a few of them:

https://www.eclipse.org/jetty/powered/powered.html

(Just noticed that Solr is NOT on that page!  I will look into that!)

Thanks,
Shawn