[HBASE-9895] 0.96 Import utility can't import an exported file from 0.94

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.96.0
• Fix Version/s: 0.98.0, 0.96.1
• Component/s: mapreduce
• Hadoop Flags: Reviewed

Release Note

To import 0.94 exported file in 0.96 cluster or onwards, you need to set system property "hbase.import.version" when running the import command as below:

./bin/hbase -Dhbase.import.version=0.94 org.apache.hadoop.hbase.mapreduce.Import <table name> <import file folder>

• Assignee: Jeffrey Zhong
• Reporter: Jeffrey Zhong
• Created: 05/Nov/13 19:06
• Updated: 17/Dec/13 18:53
• Resolved: 12/Nov/13 02:58

Description

Basically we PBed org.apache.hadoop.hbase.client.Result so a 0.96 cluster cannot import 0.94 exported files. This issue is annoying because a user can't import his old archive files after upgrade or archives from others who are using 0.94.

The ideal way is to catch deserialization error and then fall back to 0.94 format for importing.

Issue Links

• is related to: HBASE-9360 Enable 0.94 -> 0.96 replication to minimize upgrade down time