Magento – Redis Issue In Magento 2

awserrormagento2ordersredis

There is a very strange issue on our Magento site. We are performing some custom write operations after order has been placed using checkout_submit_all_after event. These work fine for some order but the code breaks sometimes. I put a log on every step and got this error .

Notice: Redis::exec(): send of 8192 bytes failed with errno=104
Connection reset by peer in vendor/colinmollenhour/credis/Client.php

These errors only show for some random orders. I contacted our AWS server guy and he claimed its a coding issue and not Redis configuration. I don't really know Redis so I don't know the next step.

Please, does anyone has any clue on how I can solve this?? I also notice when we clear Magento cache, the issue will be fixed but if we don't clear cache, the code starts breaking.

Thanks

Best Answer

It's not a magento issue it's a redis and / or sever config issue. Redis is killing the connection. I was typing up a reply and then I spotted this answer on SO

https://stackoverflow.com/a/52612405/10121426

So yeah connection issue. Not coding issue.

Related Solutions

Magento Redis – How to Disable Redis When Moving Site to New Server

Yes, with the additional step of removing the lines in app/etc/local.xml that involve Redis and removing any Redis extensions that you have installed. Most likely, the only one you'd have will be Cm_RedisSession. You can disable that extension by editing the app/etc/modules/Cm_RedisSession.xml file and changing the enabled node from true to false.

Your app/etc/local.xml should look similar to this on your new site:

<config>
<global>
<install>
  <date><![CDATA[Thu, 1 Jan 2015 19:00:00 +0000]]></date>
</install>
<crypt>
  <key><![CDATA[XXXXXXXXXXXXXXXXXXXXXXXXXXXX]]></key>
</crypt>
<disable_local_modules>false</disable_local_modules>
<resources>
  <db>
    <table_prefix><![CDATA[]]></table_prefix>
  </db>
  <default_setup>
    <connection>
      <host><![CDATA[DATABASE_HOST]]></host>
      <username><![CDATA[USERNAME]]></username>
      <password><![CDATA[PASSWORD]]></password>
      <dbname><![CDATA[DATABASE_NAME]]></dbname>
      <initStatements><![CDATA[SET NAMES utf8]]></initStatements>
      <model><![CDATA[mysql4]]></model>
      <type><![CDATA[pdo_mysql]]></type>
      <pdoType><![CDATA[]]></pdoType>
      <active>1</active>
    </connection>
  </default_setup>
</resources>
<session_save><![CDATA[files]]></session_save>
</global>
<admin>
<routers>
  <adminhtml>
    <args>
      <frontName><![CDATA[admin]]></frontName>
    </args>
  </adminhtml>
  </routers>
</admin>
</config>

Magento – Magento Enterprise – Ongoing Redis Connection Errors

You might try checking for network connection limits. We've seen that happen before where something opens a TON of connections to Redis, and stops further connections, then goes away on its own. The error messages are deceptive because they won't flat out say that and it takes some poking around to actually figure that out.

I.e. Redis can only have so many open connections, as may a given service on your particular setup, so if you hit that it won't appear in any Magento/Redis logs directly.

Best Answer

Related Solutions

Magento Redis – How to Disable Redis When Moving Site to New Server

Magento – Magento Enterprise – Ongoing Redis Connection Errors

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