HBASE-26643 AssignmentManager should check for empty result returned … by Apache9 · Pull Request #4005 · apache/hbase

Apache9 · 2022-01-05T15:43:00Z

…by LoadBalancer

Apache-HBase · 2022-01-05T16:33:40Z

🎊 +1 overall

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Apache-HBase · 2022-01-05T18:47:48Z

💔 -1 overall

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Apache-HBase · 2022-01-05T18:59:55Z

💔 -1 overall

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nyl3532016

+1

Apache9 · 2022-01-06T16:08:28Z

Ah, there is a problem. For RSGroupLoadBalancer, we have to use BOGUS_SERVER_NAME to indicate the upper layer that some regions can not be assigned, otherwise the upper layer needs iterator over all the regions to check wheter there are missing ones. Otherwise we need to redesign the return value to make it possible to tell upper layer that some regions are not assigned, through other ways...

So I suppose we should not return empty map to upper layer then, we should use BOGUS_SERVER_NAME to record the regions which can not be assigned.

Let me provide a new patch.

Apache-HBase · 2022-01-06T17:13:16Z

🎊 +1 overall

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+1 💚	asflicense	0m 29s	The patch does not generate ASF License warnings.
		59m 58s

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Apache-HBase · 2022-01-06T19:39:30Z

💔 -1 overall

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Apache-HBase · 2022-01-06T20:45:45Z

🎊 +1 overall

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nyl3532016 · 2022-01-07T12:31:44Z

It seems createTableProcedure only use roundRobinAssignment, and modify retainAssignment' return is also OK

nyl3532016 · 2022-01-07T12:34:24Z

Should we also modify randomAssignment to return BOGUS_SERVER_NAME instead of null for unified？

Apache9 · 2022-01-07T13:10:54Z

Should we also modify randomAssignment to return BOGUS_SERVER_NAME instead of null for unified？

I think this is fine... As null is enough to tell the upper layer we can not assign a region. BOGUS_SERVER_NAME is used in Map since put null key to map is not a good practise usually...

nyl3532016

+1

Signed-off-by: Yulin Niu <niuyulin@apache.org>

Signed-off-by: Yulin Niu <niuyulin@apache.org> (cherry picked from commit 3f68399) Change-Id: Ib3723293c001e10e2461d86f5a9c761af9c8ad9e

Apache9 self-assigned this Jan 5, 2022

nyl3532016 approved these changes Jan 6, 2022
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HBASE-26643 LoadBalancer should not return empty map
2038e67

Apache9 force-pushed the HBASE-26643 branch from ec6b53a to 2038e67Compare January 6, 2022 16:12

nyl3532016 approved these changes Jan 7, 2022
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Apache9 merged commit 443bf30 into apache:masterJan 7, 2022

Apache9 added a commit that referenced this pull request Jan 7, 2022
HBASE-26643LoadBalancer should not return empty map (#4005)
3f68399
Signed-off-by: Yulin Niu <niuyulin@apache.org>

Apache9 added a commit that referenced this pull request Jan 7, 2022
HBASE-26643LoadBalancer should not return empty map (#4005)
2abd09f
Signed-off-by: Yulin Niu <niuyulin@apache.org>

Apache9 added a commit that referenced this pull request Jan 7, 2022
HBASE-26643LoadBalancer should not return empty map (#4005)
2f0b5ae
Signed-off-by: Yulin Niu <niuyulin@apache.org>

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HBASE-26643 AssignmentManager should check for empty result returned … - #4005

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