[SOLR-10054] Core swapping doesn't work with new metrics changes in place

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.4, 7.0
• Fix Version/s: 6.4.1, 7.0
• Assignee: Andrzej Bialecki
• Reporter: Shawn Heisey
• Created: 30/Jan/17 22:31
• Updated: 08/Jun/19 15:29
• Resolved: 01/Feb/17 16:50

Description

The new 6.4.0 version includes some significant changes having to do with metrics. These changes have broken core swapping. Will attach some screenshots.

For the screenshots that I will attach, I started Solr directly from the 6.4.0 download on Windows 7 (bin\solr start). Then I created a "foo" core and a "bar" core, each from a different configset, using the bin\solr command.

• Screenshot 1: you can see the two cores in CoreAdmin.
• Screenshot 2: Attempting to swap the cores, an error message appears about a metric already existing for the ping handler.
• Screenshot 3: Clicking somewhere else and then back to CoreAdmin shows that both cores have the same name – bar.
• If Solr is stopped and then started back up, the admin UI looks like screenshot 1 again – the change that caused two cores with the same name only took place within the running Solr and did not update core.properties files.