[SOLR-9539] UI freeze if Zookeeper is down

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 6.2
• Component/s: Admin UI
• Labels: admin-interface newdev ui
• Assignee: Unassigned
• Reporter: Mikhail Khludnev
• Created: 20/Sep/16 18:30
• Updated: 08/Jun/19 15:34

Description

1. Download Solr 6.2 and Zookeeper 3.4.6
2. Launch Zookeeper $zkServer
3. Launch two Solrs $bin\solr start -z localhost:2181 -e cloud
4. stop Zookeeper
5. get to new Admin UI. It's frozen. Respond with placeholders after few minutes. However, solr urls respond well.
6. launch Zookeeper back, UI respond smoothly and rapidly.
   I briefly checked chrome debug, I saw that every ...js response is slow, something like request filter might check zookeeper with timeout, but I don't know.