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From Marc Hoppins <marc.hopp...@eset.sk>
Subject RE: Region server idle
Date Thu, 07 Jan 2021 11:27:59 GMT
Sorry,  I forgot to point out that MEMSTORE and STOREFILES are also 0, and that USED HEAP is
only <200MB, whereas all other hosts heap used is >16GB and <23GB.

-----Original Message-----
From: Marc Hoppins <marc.hoppins@eset.sk> 
Sent: Thursday, January 7, 2021 12:23 PM
To: user@hbase.apache.org
Subject: Region server idle

EXTERNAL

Hi all,

I have a setup with 67 region servers. 29 Dec one system had to be shut down to have EMM module
swapped out - which took one work day. Host was back online 30 Dec.

My HBASE is very basic so I appreciate your patience.

My understanding of the defaults that are setup is that a major compaction should occur every
7 days.  Moreover, do I assume that more extensive balancing may occur after this happens?

When I check (via hbase master UI) the status of HBASE, I see the following:

ServerName

Start time

Last contact

Version

Requests Per Second

Num. Regions

ba-hbase16.jumbo.hq.com,16020,1604413068640<http://ba-hbase16.jumbo.hq.eset.com:16030/rs-status>

Tue Nov 03 15:17:48 CET 2020

3 s

2.1.0-cdh6.3.2

46

462

ba-hbase17.jumbo.hq.com,16020,1604413274393<http://ba-hbase17.jumbo.hq.eset.com:16030/rs-status>

Tue Nov 03 15:21:14 CET 2020

1 s

2.1.0-cdh6.3.2

19

462

ba-hbase18.jumbo.hq.com,16020,1604413480001<http://ba-hbase18.jumbo.hq.eset.com:16030/rs-status>

Tue Nov 03 15:24:40 CET 2020

2 s

2.1.0-cdh6.3.2

62

461

ba-hbase19.jumbo.hq.com,16020,1609326754985<http://ba-hbase19.jumbo.hq.eset.com:16030/rs-status>

Wed Dec 30 12:12:34 CET 2020

2 s

2.1.0-cdh6.3.2

0

0

ba-hbase20.jumbo.hq.com,16020,1604413895967<http://ba-hbase20.jumbo.hq.eset.com:16030/rs-status>

Tue Nov 03 15:31:35 CET 2020

2 s

2.1.0-cdh6.3.2

62

503

ba-hbase21.jumbo.hq.com,16020,1604414101652<http://ba-hbase21.jumbo.hq.eset.com:16030/rs-status>

Tue Nov 03 15:35:01 CET 2020

3 s

2.1.0-cdh6.3.2

59

442

ba-hbase22.jumbo.hq.com,16020,1604414308289<http://ba-hbase22.jumbo.hq.eset.com:16030/rs-status>

Tue Nov 03 15:38:28 CET 2020

0 s

2.1.0-cdh6.3.2

40

438


Why, after more than 7 days, is this host not hosting more (any) regions?  Should I initiate
some kind of rebalancing?

Thanks in advance.

M

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