https://shocksolution.com/tags/cluster/Recent content in Cluster on shocksolution.comHugoen-usMon, 11 Mar 2019 12:16:20 +0000https://shocksolution.com/posts/mysql-replication-fails-with-wsrep-error-after-restart/Mon, 11 Mar 2019 12:16:20 +0000https://shocksolution.com/posts/mysql-replication-fails-with-wsrep-error-after-restart/<h2 id="scenario">Scenario</h2> <p>A single Percona MySQL 5.7 server replicates asynchronously with a cluster of Percona MySQL 5.7 servers. After rebooting the single server, replication failed with the following symptoms:</p> <div class="code-block"> <button class="code-copy" type="button" hidden aria-label="Copy code to clipboard"> <span class="code-copy-label" aria-hidden="true">Copy</span> </button> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-text" data-lang="text"><span style="display:flex;"><span>mysql&gt; show slave status \G**************************** 1. row ************** Slave_IO_State: Waiting to reconnect after a failed registration on master Master_Host: my-replication-partner Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000120 Read_Master_Log_Pos: 3848512 Relay_Log_File: my-host-hame-relay-bin.000012 Relay_Log_Pos: 4 Relay_Master_Log_File: mysql-bin.000120 Slave_IO_Running: Connecting Slave_SQL_Running: Yes</span></span></code></pre></div> </div><p>I checked my MySQL text log (/var/log/mysql.log in my case, but the path may vary, or messages may go to syslog) and found the following error:</p>