[HBASE-1502] Remove need for heartbeats in HBase

• Type: Task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.92.0
• Hadoop Flags: Reviewed

Release Note

Deprecates what were once considered fundamental classes, HServerInfo and HServerAddress. The former has been made irrelevant because its constituent info -- server name, server load -- is now passed otherwise. HServerAddress, a class that on deserialization, did a resolve (it created a new InetSocketAddress on deserialization) was just a bad idea from the get-go. Unfortunately, HSI and HSA were all over our codebase like a cancer. Hopefully the patient survives their purging.

• Assignee: Michael Stack
• Reporter: Nitay Joffe
• Created: 09/Jun/09 03:51
• Updated: 20/Nov/15 13:02
• Resolved: 28/Apr/11 06:00

Description

HBase currently uses heartbeats between region servers and the master, piggybacking information on them when it can. This issue is to investigate if we can get rid of the need for those using ZooKeeper events.

Issue Links

• is blocked by: HBASE-3368 Split message can come in before region opened message; results in 'Region has been PENDING_CLOSE for too long' cycle
• is blocked by: HBASE-2486 Add simple "anti-entropy" for region assignment
• is blocked by: HBASE-3559 Move report of split to master OFF the heartbeat channel
• is part of: HBASE-1720 Why we have hbase.master.lease.period still in our logs when HRS goes to ZK now?
• is part of: HBASE-1816 Master rewrite
• is related to: HBASE-3923 HBASE-1502 Broke Shell's status 'simple' and 'detailed'
• is related to: HBASE-3933 Hmaster throw NullPointerException
• is related to: HBASE-3559 Move report of split to master OFF the heartbeat channel
• relates to: HBASE-3573 Move shutdown messaging OFF hearbeat; prereq for fix of hbase-1502
• relates to: HBASE-3574 Move ServerLoad off the heartbeat; prereq of hbase-1502