2006 MySQL server has gone away commerce_flat_rate.module

Hello

Installed demo store on Centos 7. Exploring the site.

http://centos7dev.example.com/drupal7/cmks/admin/structure/taxonomy/bran...

Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT * FROM {commerce_flat_rate_service}; Array ( ) in commerce_flat_rate_commerce_shipping_service_info() (line 120 of /home/abc/www/drupal7/commerce_kickstart-7.x-2.51/profiles/commerce_kickstart/modules/contrib/commerce_flat_rate/commerce_flat_rate.module).

Additional

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT ff.* FROM {filter_format} ff WHERE (status = :db_condition_placeholder_0) ORDER BY weight ASC; Array ( [:db_condition_placeholder_0] => 1 ) in filter_formats() (line 434 of /home/abc/www/drupal7/commerce_kickstart-7.x-2.51/modules/filter/filter.module).

Uncaught exception thrown in session handler.

PDOException: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT 1 AS expression FROM {sessions} sessions WHERE ( (sid = :db_condition_placeholder_0) AND (ssid = :db_condition_placeholder_1) ); Array ( [:db_condition_placeholder_0] => ck2SRWCfH4WrAUbVsz59tB8gDQFCGa-JNLg5WZZg1ek [:db_condition_placeholder_1] => ) in _drupal_session_write() (line 209 of /home/abc/www/drupal7/commerce_kickstart-7.x-2.51/includes/session.inc).

I get the error in:

Home Administration Site settings Advanced settings Structure Taxonom

and then click any "edit vocabulary" I get the error above.

Clicking "Brand" Then List Manage fields Manage display tabs work fine. Edit tab is the one giving the error.

I increased max_allowed_packet= in my.cnf . It didn't help

I increased php.ini memory . It didn't help

Other parts of the commerce kickstart demo seem to work fine.

I have many other drupal distros on this test server. All work without giving such error.

Any Ideas guys?

S