After upgrading magento version 2.1.0 to 2.2.1 getting error unable to unserialize value

[pradeepnew]

I have tried to upgrade 2.1.0 to 2.2.1 version via composer upgrade.
Upgrade was successful but when i try to open website frontend, its showing "Unable to unserialize value" error.

Preconditions
Magento 2.2.1
PHP 7.0

Steps to reproduce
Upgrade 2.1.0 version to latest 2.2.1 via composer
run upgrade command and deploy command

Expected result
All fine but when we try to open website it throwing error Unable to unserialize value.

Actual result
`1 exception(s):
Exception #0 (InvalidArgumentException): Unable to unserialize value.

Exception #0 (InvalidArgumentException): Unable to unserialize value.
#0 /var/www/html/vendor/magento/module-widget/Helper/Conditions.php(59): Magento\Framework\Serialize\Serializer\Json->unserialize('a:2:[i:1;a:4:[s...')
#1 /var/www/html/vendor/magento/module-catalog-widget/Block/Product/ProductsList.php(259): Magento\Widget\Helper\Conditions->decode('a:2:[i:1;a:4:[s...')
#2 /var/www/html/vendor/magento/module-catalog-widget/Block/Product/ProductsList.php(236): Magento\CatalogWidget\Block\Product\ProductsList->getConditions()
#3 /var/www/html/generated/code/Magento/CatalogWidget/Block/Product/ProductsList/Interceptor.php(50): Magento\CatalogWidget\Block\Product\ProductsList->createCollection()
#4 /var/www/html/vendor/magento/module-catalog-widget/Block/Product/ProductsList.php(216): Magento\CatalogWidget\Block\Product\ProductsList\Interceptor->createCollection()
#5 /var/www/html/vendor/magento/framework/View/Element/AbstractBlock.php(666): Magento\CatalogWidget\Block\Product\ProductsList->_beforeToHtml()
#6 /var/www/html/generated/code/Magento/CatalogWidget/Block/Product/ProductsList/Interceptor.php(817): Magento\Framework\View\Element\AbstractBlock->toHtml()
#7 /var/www/html/vendor/magento/framework/View/Layout.php(558): Magento\CatalogWidget\Block\Product\ProductsList\Interceptor->toHtml()
#8 /var/www/html/vendor/magento/framework/View/Layout.php(534): Magento\Framework\View\Layout->_renderBlock('71feee93b718ea1...')
#9 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('71feee93b718ea1...')
#10 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('71feee93b718ea1...')
#11 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('71feee93b718ea1...', true)
#12 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('71feee93b718ea1...')
#13 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('content')
#14 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('content')
#15 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('content')
#16 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('content', true)
#17 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('content')
#18 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('main')
#19 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('main')
#20 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('main')
#21 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('main', true)
#22 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('main')
#23 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('columns')
#24 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('columns')
#25 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('columns')
#26 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('columns', true)
#27 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('columns')
#28 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('main.content')
#29 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('main.content')
#30 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('main.content')
#31 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('main.content', true)
#32 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('main.content')
#33 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('page.wrapper')
#34 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('page.wrapper')
#35 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('page.wrapper')
#36 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('page.wrapper', true)
#37 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('page.wrapper')
#38 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('page.wrapper.ou...')
#39 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('page.wrapper.ou...')
#40 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('page.wrapper.ou...')
#41 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('page.wrapper.ou...', true)
#42 /var/www/html/vendor/magento/framework/View/Layout.php(585): Magento\Framework\View\Layout\Interceptor->renderElement('page.wrapper.ou...')
#43 /var/www/html/vendor/magento/framework/View/Layout.php(536): Magento\Framework\View\Layout->_renderContainer('root')
#44 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework\View\Layout->renderNonCachedElement('root')
#45 /var/www/html/vendor/magento/framework/View/Layout.php(489): Magento\Framework\View\Layout\Interceptor->renderNonCachedElement('root')
#46 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(193): Magento\Framework\View\Layout->renderElement('root', true)
#47 /var/www/html/vendor/magento/framework/View/Layout.php(954): Magento\Framework\View\Layout\Interceptor->renderElement('root')
#48 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Layout->getOutput()
#49 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\View\Layout\Interceptor->___callParent('getOutput', Array)
#50 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception{closure}()
#51 /var/www/html/generated/code/Magento/Framework/View/Layout/Interceptor.php(494): Magento\Framework\View\Layout\Interceptor->___callPlugins('getOutput', Array, Array)
#52 /var/www/html/vendor/magento/framework/View/Result/Page.php(257): Magento\Framework\View\Layout\Interceptor->getOutput()
#53 /var/www/html/vendor/magento/framework/View/Result/Layout.php(170): Magento\Framework\View\Result\Page->render(Object(Magento\Framework\App\Response\Http\Interceptor))
#54 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Result\Layout->renderResult(Object(Magento\Framework\App\Response\Http\Interceptor))
#55 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\View\Result\Page\Interceptor->___callParent('renderResult', Array)
#56 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception{closure}(Object(Magento\Framework\App\Response\Http\Interceptor))
#57 /var/www/html/generated/code/Magento/Framework/View/Result/Page/Interceptor.php(130): Magento\Framework\View\Result\Page\Interceptor->___callPlugins('renderResult', Array, Array)
#58 /var/www/html/vendor/magento/framework/App/Http.php(139): Magento\Framework\View\Result\Page\Interceptor->renderResult(Object(Magento\Framework\App\Response\Http\Interceptor))
#59 /var/www/html/vendor/magento/framework/App/Bootstrap.php(256): Magento\Framework\App\Http->launch()
#60 /var/www/html/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))
#61 {main}`

[magento-engcom-team]

@pradeepnew , thank you for your report.
Please use the issue reporting guidelines to report an issue. Please, edit issue description and include the preconditions, the steps required to reproduce, the actual result, and the expected result.
Please, add the following information:

• Preconditions: Magento version
• Steps to reproduce
• Expected result
• Actual result

[eCommerceGorilla]

If you disable your third party modules and then refresh your cache you should gain access back to the site. More than likely you have a module that have not been updated to run with the 2.2 serialization changes outlined http://devdocs.magento.com/guides/v2.2/release-notes/backward-incompatible-changes.html

[duongquyet]

Hi,
I have same problem. Did you fix it?

[magento-engcom-team]

@pradeepnew thanks for the feedback. Unfortunately, we cannot reproduce this issue. Please provide more detailed steps to reproduce or try to reproduce this issue on a clean installation or latest release.

[daniloargentiero]

I had the same problem.
Flush your cache should be fix your problem, in my case:

redis-cli flushall

If this isn't enough, also truncate these tables:

• magento_logging_event (not recoverable)
• sales_invoice_grid
• sales_order_grid

After upgarade you can recover the tables' content:

1. Set this configuration: config/system/developer grid async -> enabled
2. Run the cron
3. Set this configuration: config/system/developer grid async -> previous value

I hope it works for you.

[magento-engcom-team]

@pradeepnew, thank you for your report.
We were not able to reproduce this issue by following the steps you provided. If you'd like to update it, please reopen the issue.