[SOLR-15010] Missing jstack warning is alarming, when using bin/solr as client interface to solr

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 8.7
• Fix Version/s: 8.8
• Assignee: Eric Pugh
• Reporter: Eric Pugh
• Created: 21/Nov/20 11:29
• Updated: 13/Feb/21 00:09
• Resolved: 11/Jan/21 22:33

Description

In SOLR-14442 we added a warning if jstack wasn't found. I notice that I use the bin/solr command a lot as a client, so bin solr zk or bin solr healthcheck.

For example:

docker exec solr1 solr zk cp /security.json zk:security.json -z zoo1:2181

All of these emit the message:

The currently defined JAVA_HOME (/usr/local/openjdk-11) refers to a location
where java was found but jstack was not found. Continuing.

This is somewhat alarming, and then becomes annoying. Thoughts on maybe only conducting this check if you are running bin/solr start or one of the other commands that is actually starting Solr as a process?

Issue Links

• is related to: SOLR-14442 bin/solr to attempt jstack before killing hung Solr instance
• links to: GitHub Pull Request #2192