[HBASE-28660] list_namespace not working after an incorrect user input

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.6.0, 3.0.0-beta-2
• Component/s: shell
• Assignee: Unassigned
• Reporter: Ke Han
• Created: 13/Jun/24 02:45
• Updated: 22/Nov/24 09:54

Description

When using hbase-3.0.0 or 2.6.0, there's a shell bug related to failure handling.

If user inputs an incorrect list_namespace command, hshell throws an exception. However, it has a side effect on the following list_namespace command: the result becomes empty (incorrect).

Reproduce

Execute the following 2 commands can reproduce this bug

• The first command is an incorrect list_namespace command, which causes and exception.
• The second command is a correct list_namespace command, its return value is incorrect (empty).

list_namespace, 'ns.*'
list_namespace

Here's the execution result

The return result of the second command is incorrect.

hbase:002:0> list_namespace, 'ns.*'
Traceback (most recent call last):
SyntaxError ((hbase):2: syntax error, unexpected end-of-file)
list_namespace, 'ns.*'
                      ^
hbase:003:0> list_namespace
hbase:004:0>  

The expected output of list_namespace is

hbase:001:0> list_namespace
NAMESPACE                                                                                                                             
default                                                                                                                               
hbase                                                                                                                                 
2 row(s)
Took 0.6820 seconds 

Root Cause

This could be a bug in shell related to list_namespace. Restarting the shell restores normal functionality of the list_namespace command.