Impala can't access all hive table

Question

I try to query hbase data through hive (I\'m using cloudera). I did a fiew hive external table pointing to hbase but the thing is Cloudera\'s Impala doesn\'t have an access

Answer 1

Though the INVALIDATE METADATA command in impala works it is documented to be expensive, in recent versions it is now possible to invalidate the metadata of just 1 table, which will have less impact:

INVALIDATE METADATA mynewtable

Alternately, if you use HUE, there is also a less expensive option available. Which may be convenient if you have added multiple new tables:

Answer 2

Run the query 'invalidate metadata' in Impala and your tables will show-up.

Answer 3

Beneath is the ? online help explanation: Missing some tables? In order to update the list of tables/metadata seen by Impala, execute one of these queries:

"invalidate metadata" invalidates the entire catalog metadata. All table metadata will be reloaded on the next access.
"invalidate metadata <table>" invalidates the metadata, load on the next access
"refresh <table>" refreshes the metadata immediately. It is a faster, incremental refresh.