Why would Hive tables disappeared suddenly?

Question

When I enter show tables; all tables were showed on the screen as return, but when I query any of the table, it saidTable not found... Would anyone please advise why would this happen suddenly? Suddenly means I was browsing a table in the last min and it turned out like this afterwards...

hive> show tables;
OK
mahoutpoc
prod
rc_agg2
rc_uum
uum
Time taken: 1.541 seconds
hive> select * from rc_uum limit 10;
FAILED: SemanticException [Error 10001]: Line 1:14 Table not found 'rc_uum'

Answer 1

This is because 'rc_umm' != 'rc_uum'.