[jira] [Commented] (SOLR-11527) The Solr start script should detect service install and recommend NOT calling script directly

["Shawn Heisey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16214581#comment-16214581 ] 

Shawn Heisey commented on SOLR-11527:
-------------------------------------

In situations where a user installs the Solr service to a *NIX system with gnu tools, running bin/solr start directly (instead of starting the service) will result in very different behavior than the user likely expects.

I think that the start script should detect when Solr has been installed as a service.  When that status is detected, ut should output a warning if started in the "manual" way.

To do this, the service installer script should create a file with a name like "install.params" in the install directory (default /opt/solr).  The init script should set an environment variable, something like SOLR_STARTED_FROM_INIT.  I can envision a scenario where a later service install could utilize information in the install.params file.

If consensus says that the filename and environment variable name are terrible, feel free to bikeshed.

If the bin/solr script finds the install.params file, and does NOT find the SOLR_STARTED_FROM_INIT variable, it should output a warning that says something like this:

{code}
=== WARNING ===
Solr has been installed as a service.  This script execution is taking place *outside* of the service.  Solr should be started with the service command or the init script, not run directly from the install directory.
===============
{code}


> The Solr start script should detect service install and recommend NOT calling script directly
> ---------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11527
>                 URL: https://issues.apache.org/jira/browse/SOLR-11527
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: scripts and tools
>    Affects Versions: 7.1.0
>            Reporter: Shawn Heisey
>            Priority: Minor
>




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