Bug: list_regions fails if table is under split
Status: Resolved | Priority: Minor | Resolution: Fixed
Created: 28/Feb/20 08:44
Affects Version/s: 1.6.0

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}