(erratum) Trying to enable HTTP gzip compression

[Luthien Dulk <ma...@europeana.eu>]

hi, there was an error in my description of how to enable HTTP compression: the "--add-to-start=gzip” command should NOT be executed from the Solr root directory, but from the server/ (Jetty) directory. The command produces a start.ini file that otherwise ends up in the wrong place. 
I guess this also settles whether the setting persists or not :)

Corrected description below.


(using Solr 6.6.5)

1) add a gzip configuration file called jetty-gzip.xml in /server/etc/ 
Default values provided in the standalone Jetty installation are OK, but make sure to only include properties listed under “gzip configuration” of the appropriate version (e.g.: https://www.eclipse.org/jetty/documentation/9.3.25.v20180904/gzip-filter.html). 
The jetty-gzip.xml taken from my Jetty v.9.4.6 installation contained some fields that prevented Solr’s embedded Jetty v.9.3.14 from starting

2) add a file called gzip.mod to /server/modules
Our sysadmin had provided me with this one; the only lines that are not commented out in there are:

- - - - - - -

[depend]
server

[xml]
etc/jetty-gzip.xml

- - - - - - -

3) from the server/ directory:
> java -jar start.jar --list-modules
- shows the installed modules, and if they are enabled or not

> java -jar start.jar --add-to-start=gzip
writes a start.ini file that activates the gzip module on startup

Start Solr in the usual way 
> bin/solr start


Thanks,
Lúthien
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