[HBASE-22040] Add mergeRegionsAsync with a List of region names method in AsyncAdmin - ASF JIRA

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Details

Type: Sub-task
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.3.0
Component/s: Admin, asyncclient, Client
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Add a mergeRegionsAsync(byte[][], boolean) method in the AsyncAdmin interface.

Instead of using assert, now we will throw IllegalArgumentException when you want to merge less than 2 regions at client side. And also, at master side, instead of using assert, now we will throw DoNotRetryIOException if you want merge more than 2 regions, since we only support merging two regions at once for now.

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Add a mergeRegionsAsync(byte[][], boolean) method in the AsyncAdmin interface. Instead of using assert, now we will throw IllegalArgumentException when you want to merge less than 2 regions at client side. And also, at master side, instead of using assert, now we will throw DoNotRetryIOException if you want merge more than 2 regions, since we only support merging two regions at once for now.

Description

Although we only support merging two regions until now, but the rpc protocol does support passing more than two regions to master.

So I think we should provide the methods, but need to add comments to say that for now we only support merging two regions so do not try to pass more than two regions.