[HBASE-21001] ReplicationObserver fails to load in HBase 2.0.0

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha-4, 2.0.0
• Fix Version/s: 3.0.0, 2.2.0, 2.1.1, 2.0.3
• Labels: replication
• Assignee: Guangxu Cheng
• Reporter: Wei-Chiu Chuang
• Created: 03/Aug/18 03:03
• Updated: 02/Oct/19 17:15
• Resolved: 08/Sep/18 14:30

Description

ReplicationObserver was added in HBASE-17290 to prevent "Potential loss of data for replication of bulk loaded hfiles".

I tried to enable bulk loading replication feature (hbase.replication.bulkload.enabled=true and configure hbase.replication.cluster.id) on a HBase 2.0.0 cluster, but the RegionServer started with the following error:

2018-08-02 18:20:36,365 INFO org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost: System coprocessor loading is enabled
2018-08-02 18:20:36,365 INFO org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost: Table coprocessor loading is enabled
2018-08-02 18:20:36,365 ERROR org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost: org.apache.hadoop.hbase.replication.regionserver.ReplicationObserver is not of type
RegionServerCoprocessor. Check the configuration of hbase.coprocessor.regionserver.classes
2018-08-02 18:20:36,366 ERROR org.apache.hadoop.hbase.coprocessor.CoprocessorHost: Cannot load coprocessor ReplicationObserver

It looks like this was broken by HBASE-17732 to me, but I could be wrong.

Issue Links

• is broken by: HBASE-17732 Coprocessor Design Improvements