MySQL server has gone away

danio_d
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Senior Member

10 years 2 months ago #44640 by danio_d

MySQL server has gone away was created by danio_d

Hi,

I have a strange problem.
Recently, very often. In the flexicontent panel shows a message:

Code:

        MySQL server has gone away SQL=SELECT c.id,c.version,iv.version as iversion FROM gavwb_content as c LEFT JOIN gavwb_flexicontent_items_versions as iv ON c.id=iv.item_id AND c.version=iv.version JOIN gavwb_categories as cat ON c.catid=cat.id WHERE c.version > '1' AND iv.version IS NULL AND cat.extension='com_content' LIMIT 0,1
        MySQL server has gone away SQL=SELECT c.id,c.version,iv.version as iversion FROM gavwb_content as c LEFT JOIN gavwb_flexicontent_items_versions as iv ON c.id=iv.item_id AND c.version=iv.version JOIN gavwb_categories as cat ON c.catid=cat.id WHERE c.version > '1' AND iv.version IS NULL AND cat.extension='com_content' LIMIT 0,1

or this:

Code:

        MySQL server has gone away SQL=SELECT c.id,c.version,iv.version as iversion FROM gavwb_content as c LEFT JOIN gavwb_flexicontent_items_versions as iv ON c.id=iv.item_id AND c.version=iv.version JOIN gavwb_categories as cat ON c.catid=cat.id WHERE c.version > '1' AND iv.version IS NULL AND cat.extension='com_content' LIMIT 0,1
        MySQL server has gone away SQL=SELECT c.id,c.version,iv.version as iversion FROM gavwb_content as c LEFT JOIN gavwb_flexicontent_items_versions as iv ON c.id=iv.item_id AND c.version=iv.version JOIN gavwb_categories as cat ON c.catid=cat.id WHERE c.version > '1' AND iv.version IS NULL AND cat.extension='com_content' LIMIT 0,1
        Wystąpił błąd podczas wczytywania modułu MySQL server has gone away SQL=SELECT m.id, m.title, m.module, m.position, m.content, m.showtitle, m.params, mm.menuid FROM gavwb_modules AS m LEFT JOIN gavwb_modules_menu AS mm ON mm.moduleid = m.id LEFT JOIN gavwb_extensions AS e ON e.element = m.module AND e.client_id = m.client_id WHERE m.published = 1 AND e.enabled = 1 AND (m.publish_up = '0000-00-00 00:00:00' OR m.publish_up <= '2014-01-31 20:39:45') AND (m.publish_down = '0000-00-00 00:00:00' OR m.publish_down >= '2014-01-31 20:39:45') AND m.access IN (1,1,2,3) AND m.client_id = 1 AND (mm.menuid = 0 OR mm.menuid <= 0) ORDER BY m.position, m.ordering

and Initial permission show update.

After refresh view times, message disappears and flexi working properly. But recently, very often I get an error 500 on the front page.

My version is: J2.5.17, F:2.0.0 RC9b r1601
Yes, I now it's old. But I made backup and test page, and update to the last varsion and the error is stille this same.

Any help?

THX
dede

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ggppdk
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10 years 2 months ago #44647 by ggppdk

Replied by ggppdk on topic MySQL server has gone away

Hello

how many items do you have in your website, and how many versions per item ?

please execute this in phpmyadmin:
SHOW VARIABLES LIKE 'max_allowed_packet'

what is the size given by the above command

you may try contacting your web-host to increase the above given value

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Like the our support? (for a bug-free FC, despite having a long list of functions) Like the features? Like the ongoing development and future commitment to FLEXIcontent?
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danio_d
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10 years 2 months ago #44664 by danio_d

Replied by danio_d on topic MySQL server has gone away

Hi,

Code:

max_allowed_packet 	8388608

items total: 11700
cats: 146
versions per item: 10, change now to 5

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ggppdk
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10 years 2 months ago #44666 by ggppdk

Replied by ggppdk on topic MySQL server has gone away

Hello

you have a lot of content,
latest versions of FLEXIcontent has several important speed optimizations for large sites, (10x,20x faster SQL queries)
-- category view
-- items manager
-- module
-- other ...

you should update

About your issue:
-- the changed value 10 -> 5 will effect only new save operations

in your backup site , truncate (=make empty do not delete) these 2 table (e.g. via phpmyadmin select the table and then click to empty them)
DBPREFIX_flexicontent_versions
DBPREFIX_flexicontent_item_versions

- or in the SQL box of phpmyadmin execute:

Code:

truncate DBPREFIX_flexicontent_versions,
DBPREFIX_flexicontent_item_versions

Then visit FLEXIcontent dashboard and click to add item versions

Does it solve the problem?

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danio_d
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Senior Member

10 years 2 months ago #44683 by danio_d

Replied by danio_d on topic MySQL server has gone away

THX for Your answer.

I made how You write.
Tell me. As long as it works? Because it works 5 hours. When I refresh page error code was this same.

So, I repeat operation and truncate this two tables.
After that in position 'Add the items current versions' show error code:

Code:

ABORT: PHP cpu time limit exceeded in FlexicontentModelFlexicontent::getDiffVersions() called at [/05v_fabryka_2014/administrator/components/com_flexicontent/models/flexicontent.php:862], in FlexicontentModelFlexicontent::getDiffVersions() called at [/05v_fabryka_2014/administrator/components/com_flexicontent/models/flexicontent.php:906], in FlexicontentModelFlexicontent::addCurrentVersionData() called at [/05v_fabryka_2014/administrator/components/com_flexicontent/controller.php:976], in FlexicontentController::addCurrentVersionData() called at [/05v_fabryka_2014/libraries/joomla/application/component/controller.php:761], in JController::execute() called at [/05v_fabryka_2014/administrator/components/com_flexicontent/admin.flexicontent.php:198], in require_once() called at [/05v_fabryka_2014/libraries/joomla/application/component/helper.php:383], in JComponentHelper::executeComponent() called at [/05v_fabryka_2014/libraries/joomla/application/component/helper.php:351], in JComponentHelper::renderComponent() called at [/05v_fabryka_2014/administrator/includes/application.php:153], in JAdministrator::dispatch() called at [/05v_fabryka_2014/administrator/index.php:46]

Now I have the same situation as at the beginning:

Code:

currentMissing(): SQL QUERY ERROR:
        MySQL server has gone away SQL=SELECT c.id,c.version,iv.version as iversion FROM gavwb_content as c LEFT JOIN gavwb_flexicontent_items_versions as iv ON c.id=iv.item_id AND c.version=iv.version JOIN gavwb_categories as cat ON c.catid=cat.id WHERE c.version > '1' AND iv.version IS NULL AND cat.extension='com_content' LIMIT 0,1
        currentMissing(): SQL QUERY ERROR:
        MySQL server has gone away SQL=SELECT c.id,c.version,iv.version as iversion FROM gavwb_content as c LEFT JOIN gavwb_flexicontent_items_versions as iv ON c.id=iv.item_id AND c.version=iv.version JOIN gavwb_categories as cat ON c.catid=cat.id WHERE c.version > '1' AND iv.version IS NULL AND cat.extension='com_content' LIMIT 0,1
        Wystąpił błąd podczas wczytywania modułu MySQL server has gone away SQL=SELECT m.id, m.title, m.module, m.position, m.content, m.showtitle, m.params, mm.menuid FROM gavwb_modules AS m LEFT JOIN gavwb_modules_menu AS mm ON mm.moduleid = m.id LEFT JOIN gavwb_extensions AS e ON e.element = m.module AND e.client_id = m.client_id WHERE m.published = 1 AND e.enabled = 1 AND (m.publish_up = '0000-00-00 00:00:00' OR m.publish_up <= '2014-02-02 20:16:38') AND (m.publish_down = '0000-00-00 00:00:00' OR m.publish_down >= '2014-02-02 20:16:38') AND m.access IN (1,1,2,3) AND m.client_id = 1 AND (mm.menuid = 0 OR mm.menuid <= 0) ORDER BY m.position, m.ordering

and 'Initial permission' update button

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ggppdk
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10 years 2 months ago #44686 by ggppdk

Replied by ggppdk on topic MySQL server has gone away

Hello

SHOW VARIABLES LIKE 'max_allowed_packet'
gives
8M

what does this give ?
SHOW VARIABLES LIKE 'wait_timeout'

- ask your provider to change 'max_allowed_packet' to at least 16M
or preferably 32M
- and increase 'wait_timeout' if it is too low

this is a server limitation, but i guess we can try to bypass Joomla DB layer and use an unbuffered DB query ?

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