[ZOOKEEPER-4312] ZooKeeperServerEmbedded: enhance server start/stop for testability

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.7.0
• Fix Version/s: 3.8.0, 3.7.1
• Component/s: server
• Labels: pull-request-available
• Assignee: Enrico Olivelli
• Reporter: Enrico Olivelli
• Created: 07/Jun/21 11:17
• Updated: 13/Jan/22 22:28
• Resolved: 13/Jun/21 18:57

Description

ZooKeeperServerEmbedded works well for running ZooKeeper but it lacks support for a few little features in order to use it for tests.

I saw these problems while working on the port of Curator Testing Server to ZooKeeperServerEmbedded.

• There is no wait to wait for the server to be up-and-running
• When you "close()" the server, it does not wait for the ports to be closed
• There is no wait to have the ConnectString for the server

Issue Links

• is required by: SOLR-15636 Robust support for running Solr with an embedded zookeeper
• Parent Feature: ZOOKEEPER-3874 Official API to start ZooKeeper server from Java
• links to: GitHub Pull Request #1709
• links to: GitHub Pull Request #1710