MySQL 5.7+ SQLSTATE[HY000]: General error: 2006 MySQL server has gone away - caused by plugin Actions

[oraclerob]

Upgrading MySQL to 5.7 on a previous working Piwik has broken it. Most of the dashboard widgets now error with:

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SQLSTATE[HY000]: General error: 2006 MySQL server has gone away - caused by plugin Actions
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SQLSTATE[HY000]: General error: 2006 MySQL server has gone away - caused by plugin Actions

As per the FAQ I have increased the following parameters:
wait_timeout=100000
max_allowed_packet=128M

Restarted and so on. Even tried reimporting the database and removing the character sets as per another solution.

[oraclerob]

MySQL logs show the following:

2015-12-21T02:49:29.398682Z 49 [Note] Aborted connection 49 to db: 'piwik' user: 'root' host: 'localhost' (Got an error reading communication packets)

[oraclerob]

Sorry forgot to post the versions tested that product the error.
2.0.15 and 2.15.1-b10

[mattab]

@oraclerob please try using our beta 11 (just released), which should work well with mysql 5.7 ? Also try to restart mysql after changing the settings. And also try setting max_allowed_packet to 512M ?

[oraclerob]

Thanks for the quick response. As requested I have made the change:
max_allowed_packet=512M

Restarted MySQL and upgraded to:
About Piwik 2.15.1-b11

This has not resolved the problems. Some of the dashboard is working - so I believe it is making MySQL connections correctly - however the only working items on the dashboard are:
Visitors in real time
Visitor Log
Returning visitors over time

Every other item on the dashboard is broken.

[oraclerob]

Switching my Piwik 2.15.1-b11 install back to MySQL 5.0.21 immediately fixes the problem. I'm also running on Windows with Php v7.0. This config however works properly on MySQL 5.0.21 so I'm inclined to think that there is an issue with piwik on MySQL 5.7.

[tsteur]

Can you try setting 127.0.0.1 instead of localhost? It might sound weird but I once had such an issue a while ago (not with MySQL 5.7)

[SS10house]

I am having the same issue with a clean install of PIWIK 2.15.1-b11 with Mysql 5.7
I have followed all troubleshooting steps here and cannot solve.

I just did a clean install of 2.15.1-b11, specifying "127.0.0.1" instead of "localhost"
issue is still there

Edit: I should not have bothered. Turns out my issue was an out of memory error, solution was to allocate more ram to server.

[tsteur]

@SS10house glad to hear it works 👍

@oraclerob I just tried to reproduce with PHP7 + MySQL 5.7 but works fine for me (under Linux, not Windows). Maybe memory is a problem similar to @SS10house ? Can you try to specify an IP for database in config/config.ini.php instead of localhost? Probably won't change anything but worth a try

[oraclerob]

Tried the suggestion no luck and increased php memory to 512MB from 256MB. I would be interested if @SS10house is using windows with PHP7 though. I'm see the following warning in my PHP logs if this is a clue:
[22-Dec-2015 23:47:28 UTC] PHP Warning: mt_srand() expects parameter 1 to be integer, float given in xxxxxxxxxxxx\piwik\core\Common.php on line 589

[tsteur]

Can you change this line https://github.com/piwik/piwik/blob/2.15.0/core/Common.php#L589 to mt_srand((int)$seed); and see if you get more information?

[oraclerob]

I've made that change and it has fixed the warning message. The problem is still not fixed. I'm checking out if there is a way I can enable more verbose logging so I can find the php module/query that is causing the issue. If you know of an option within piwik or mysql please let me know.

[oraclerob]

I’ve been able to get a stack trace of the errror, posted below:

ERROR: Failed to get data from API: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away - caused by plugin Actions

#0 xxxxxxxxxxxxx\piwik\core\ArchiveProcessor\Loader.php(126): Piwik\ArchiveProcessor\PluginsArchiver->callAggregateAllPlugins('4', '0')

#1 xxxxxxxxxxxxx\piwik\core\ArchiveProcessor\Loader.php(74): Piwik\ArchiveProcessor\Loader->prepareAllPluginsArchive('4', '0')

#2 xxxxxxxxxxxxx\piwik\core\Archive.php(901): Piwik\ArchiveProcessor\Loader->prepareArchive('VisitsSummary')

#3 xxxxxxxxxxxxx\piwik\core\Archive.php(715): Piwik\Archive->prepareArchive(Array, Object(Piwik\Site), Object(Piwik\Period\Day))

#4 xxxxxxxxxxxxx\piwik\core\Archive.php(667): Piwik\Archive->cacheArchiveIdsAfterLaunching(Array, Array)

#5 xxxxxxxxxxxxx\piwik\core\Archive.php(605): Piwik\Archive->getArchiveIds(Array)

#6 xxxxxxxxxxxxx\piwik\core\Archive.php(332): Piwik\Archive->get(Array, 'numeric')

#7 xxxxxxxxxxxxx\piwik\plugins\VisitsSummary\API.php(35): Piwik\Archive->getDataTableFromNumeric(Array)

#8 [internal function]: Piwik\Plugins\VisitsSummary\API->get('1', 'day', '2015-11-23,2015...', false, Array)

#9 xxxxxxxxxxxxx\piwik\core\API\Proxy.php(208): call_user_func_array(Array, Array)

#10 xxxxxxxxxxxxx\piwik\plugins\API\API.php(407): Piwik\API\Proxy->call('\Piwik\Plugins...', 'get', Array)

#11 [internal function]: Piwik\Plugins\API\API->get('1', 'day', '2015-11-23,2015...', false, Array)

#12 xxxxxxxxxxxxx\piwik\core\API\Proxy.php(208): call_user_func_array(Array, Array)

#13 xxxxxxxxxxxxx\piwik\core\Plugin\Visualization.php(259): Piwik\API\Proxy->call('\Piwik\Plugins...', 'get', Array)

#14 xxxxxxxxxxxxx\piwik\core\Plugin\Visualization.php(180): Piwik\Plugin\Visualization->loadDataTableFromAPI()

#15 xxxxxxxxxxxxx\piwik\core\Plugin\ViewDataTable.php(414): Piwik\Plugin\Visualization->buildView()

#16 xxxxxxxxxxxxx\piwik\core\Plugin\Controller.php(248): Piwik\Plugin\ViewDataTable->render()

#17 xxxxxxxxxxxxx\piwik\plugins\VisitsSummary\Controller.php(126): Piwik\Plugin\Controller->renderView(Object(Piwik\Plugins\CoreVisualizations\Visualizations\JqplotGraph\Evolution))

#18 xxxxxxxxxxxxx\piwik\plugins\VisitsSummary\Controller.php(42): Piwik\Plugins\VisitsSummary\Controller->getEvolutionGraph(false, Array, 'getIndexGraph')

#19 [internal function]: Piwik\Plugins\VisitsSummary\Controller->index()

#20 xxxxxxxxxxxxx\piwik\core\FrontController.php(499): call_user_func_array(Array, Array)

#21 xxxxxxxxxxxxx\piwik\core\FrontController.php(99): Piwik\FrontController->doDispatch('VisitsSummary', 'index', Array)

#22 xxxxxxxxxxxxx\piwik\core\dispatch.php(34): Piwik\FrontController->dispatch()

#23 xxxxxxxxxxxxx\piwik\index.php(27): require_once('XXXXXXXXXXXXXX...')

#24 {main}

From: Thomas Steur [mailto:notifications@github.com]
Sent: Wednesday, 23 December 2015 8:08 AM
To: piwik/piwik piwik@noreply.github.com
Cc: Rob Mascaro rmascaro@scnet.com.au
Subject: Re: [piwik] MySQL 5.7+ SQLSTATE[HY000]: General error: 2006 MySQL server has gone away - caused by plugin Actions (#9419)

Can you change this line https://github.com/piwik/piwik/blob/2.15.0/core/Common.php#L589 to mt_srand((int)$seed); and see if you get more information?

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