[HBASE-16638] Reduce the number of Connection's created in classes of hbase-spark module

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, connector-1.0.0
• Component/s: hbase-connectors, spark
• Hadoop Flags: Reviewed
• Assignee: Weiqing Yang
• Reporter: Ted Yu
• Created: 15/Sep/16 20:40
• Updated: 26/Apr/19 10:14
• Resolved: 14/Oct/16 16:01

Description

In HBaseResources.scala :

case class RegionResource(relation: HBaseRelation) extends ReferencedResource {
  var connection: Connection = _
  var rl: RegionLocator = _
...
  override def init(): Unit = {
    connection = ConnectionFactory.createConnection(relation.hbaseConf)

Connection is created per RegionResource.
This is not necessary.

Caching of Connection's should be provided to reduce the number of concurrent Connection's.

Issue Links

• relates to: HBASE-16713 Bring back connection caching as a client API
• links to: ReviewBoard