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https://issues.apache.org/jira/browse/HBASE-23909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17047369#comment-17047369
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Viraj Jasani commented on HBASE-23909:
--------------------------------------
[~psomogyi] Would you recommend showing message something like "Some regions
are under split, please execute the command later" or it is good to display as
many regions as we can as part of list_regions?
> list_regions fails if table is under split
> ------------------------------------------
>
> Key: HBASE-23909
> URL: https://issues.apache.org/jira/browse/HBASE-23909
> Project: HBase
> Issue Type: Bug
> Components: shell
> Affects Versions: 1.6.0
> Reporter: Peter Somogyi
> Priority: Minor
>
> Shortly after executing split 'table' command from the shell the list_regions
> 'table' fails with "ERROR: undefined method `toString' for nil:NilClass"
>
> {noformat}
> hbase(main):002:0> list_regions 'cluster_test'
> SERVER_NAME |
> REGION_NAME | START_KEY | END_KEY | SIZE | REQ |
> LOCALITY |
> --------------------------- |
> --------------------------------------------------------------------- |
> ---------- | ---------- | ----- | -------- | ---------- |
> nokedli,34665,1582736360668 |
> cluster_test,,1582736408029.857a9b734a2f490e573ba20b1bbf99b3. | |
> 33333333 | 3348 | 20408042 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,33333333,1582736408029.1749360028b3a5e76b5da1d1888e5b9d. |
> 33333333 | 66666666 | 3321 | 20242123 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,66666666,1582736408029.1f1366aa0ee621d496103ac5a50bca77. |
> 66666666 | 99999999 | 3316 | 20215774 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,99999999,1582736408029.ae95589c9498443a89aea4c42c199372. |
> 99999999 | cccccccc | 3327 | 20285312 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,cccccccc,1582736408029.239647c37e27cbd3154180ce5004a1ea. |
> cccccccc | | 3355 | 20451469 | 0.0 |
> 5 rows
> hbase(main):003:0> split 'cluster_test'
> 0 row(s) in 0.2240 seconds
> hbase(main):004:0> list_regions 'cluster_test'
> ERROR: undefined method `toString' for nil:NilClass
> Here is some help for this command:
> List all regions for a particular table as an array and also filter
> them by server name (optional) as prefix
> and maximum locality (optional). By default, it will return all the
> regions for the table with any locality.
> The command displays server name, region name, start key, end key,
> size of the region in MB, number of requests
> and the locality. The information can be projected out via an array
> as third parameter. By default all these information
> is displayed. Possible array values are SERVER_NAME, REGION_NAME,
> START_KEY, END_KEY, SIZE, REQ and LOCALITY. Values
> are not case sensitive. If you don't want to filter by server name,
> pass an empty hash / string as shown below.
> Examples:
> hbase> list_regions 'table_name'
> hbase> list_regions 'table_name', 'server_name'
> hbase> list_regions 'table_name', {SERVER_NAME => 'server_name',
> LOCALITY_THRESHOLD => 0.8}
> hbase> list_regions 'table_name', {SERVER_NAME => 'server_name',
> LOCALITY_THRESHOLD => 0.8}, ['SERVER_NAME']
> hbase> list_regions 'table_name', {}, ['SERVER_NAME', 'start_key']
> hbase> list_regions 'table_name', '', ['SERVER_NAME', 'start_key']
> hbase(main):005:0> list_regions 'cluster_test'
> SERVER_NAME |
> REGION_NAME |
> START_KEY | END_KEY | SIZE |
> REQ | LOCALITY |
> --------------------------- |
> ----------------------------------------------------------------------------------------------------
> | --------------------------------------- |
> --------------------------------------- | ----- | -------- | ---------- |
> nokedli,34665,1582736360668 |
> cluster_test,,1582878981608.614acededc61f55a10816bb871d0421b. |
> | 197f83f2390a2a0c4104f4630982c585-461828 | 3348 |
> 10204021 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,197f83f2390a2a0c4104f4630982c585-461828,1582878981608.5987f972793bd422564a0758e545caa5.
> | 197f83f2390a2a0c4104f4630982c585-461828 |
> 33333333 | 3348 | 10204021 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,33333333,1582878982425.a306381f3ee03161dc832eaca066131b. |
> 33333333 | 4cdfa653a3843d49a62004a6e4e71636-501997 |
> 3321 | 10121061 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,4cdfa653a3843d49a62004a6e4e71636-501997,1582878982425.ae87e47584e3dee98e524f961fa6906e.
> | 4cdfa653a3843d49a62004a6e4e71636-501997 |
> 66666666 | 3321 | 10121061 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,66666666,1582878983449.d4015a18e47a9aeec89a1ead9a974186. |
> 66666666 | 7ffd66580ac07b1ff7636f9b15609fa6-238805 |
> 3316 | 10107887 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,7ffd66580ac07b1ff7636f9b15609fa6-238805,1582878983449.c92f8a7b3a89fee59313bdb516720319.
> | 7ffd66580ac07b1ff7636f9b15609fa6-238805 |
> 99999999 | 3316 | 10107887 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,99999999,1582878984099.36d0e3d56119f2bdcae280853c29321d. |
> 99999999 | b36cb3f90c3019779ba5a3b00fb6da2f-320789 |
> 3327 | 10142656 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,b36cb3f90c3019779ba5a3b00fb6da2f-320789,1582878984099.9d76372540e628675a4aea5a8979107d.
> | b36cb3f90c3019779ba5a3b00fb6da2f-320789 |
> cccccccc | 3327 | 10142656 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,cccccccc,1582878984966.1292a5f5dbd5f454d5d3b3cf048c4a75. |
> cccccccc | e66d48d7b227e7845b73d43eb1a06fcb-86032 |
> 3355 | 10225734 | 0.0 |
> nokedli,34665,1582736360668 |
> cluster_test,e66d48d7b227e7845b73d43eb1a06fcb-86032,1582878984966.6765ff09c59899363ae9be115a9c3d78.
> | e66d48d7b227e7845b73d43eb1a06fcb-86032 |
> | 3355 | 10225734 | 0.0 |
> 10 rowshbase(main):006:0>{noformat}
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