Phoenix Alter表添加列失败

Question

I am trying to add a column to an existing phoenix table using alter table command as below

ALTER TABLE TABLE1 ADD "db_name" VARCHAR(20);

Its failing with below warning

WARN query.ConnectionQueryServicesImpl: Unable to update meta data repo within 1 seconds for TABLE1

Let me know, If there is any timeout I need to increase to get this working.

Answer 1

When altering a table, Phoenix will by default check with the server to ensure it has the most up to date table metadata and statistics. This RPC may not be necessary when you know in advance that the structure of a table may never change. The UPDATE_CACHE_FREQUENCY property was added in Phoenix 4.7 to allow the user to declare how often the server will be checked for meta data updates. You can set this property on your table like below

ALTER TABLE TABLE1 SET UPDATE_CACHE_FREQUENCY=900000

Please refer this doc for tuning tips.