I use haproxy as banlancer for mariadb cluster，but got lost connection during query
<p>I use haproxy as banlancer for mariadb galera cluster,
it can connect and do some operation normally,but after serval seconds I want to do some search again but a got lost connection during query error.see the error below image.</p>

<p><a href="http://i.stack.imgur.com/K6Jlk.png" rel="nofollow">lost connection img</a></p>

<p>here is my haproxy.cfg</p>

<pre><code> defaults
        log                     global
        mode                    tcp
        option                  tcplog
        option                  dontlognull
        option http-server-close
        option                  redispatch
        retries                 3
        timeout http-request    10s
        timeout queue           1m
        timeout connect         10s
        timeout client          50000ms
        timeout server          50000ms
        timeout http-keep-alive 10s
        timeout check           10s
        maxconn                 3000
</code></pre>

<p>and the balance for mariadb cluster in haproxy.cfg </p>

<pre><code>listen mariadb_cluster_writes 0.0.0.0:50613    
    ## A failover pool for writes to ensure writes only hit one node at a time.
        mode tcp
        #option httpchk
        option tcpka
        option mysql-check user haproxy
        server node65 172.27.12.65:3306 check weight 2
        server node64 172.27.12.64:3306 check weight 1
        server node67 172.27.12.67:3306 check weight 1

    listen mariadb_cluster_reads 0.0.0.0:50614
    ## A load-balanced pool for reads to utilize all nodes for reads.
        mode tcp
        balance leastconn
        #option httpchk
        option tcpka
        option mysql-check user haproxy
        server node65 172.27.12.65:3306 check weight 1
        server node64 172.27.12.64:3306 check weight 1
        server node67 172.27.12.67:3306 check weight 1
</code></pre>

<p>Does anyone have idea?</p>