Hello, As a first step before looking into the details I would that you recommend to a newer version of kamailio. There might be already bugfixes for errors like this included. If you need to stay at the 5.3.x branch, choose the latest version there. If you can update, choose 5.5.1. Cheers, Henning -- Henning Westerholt - https://skalatan.de/blog/ Kamailio services - https://gilawa.com<https://gilawa.com/> From: sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; On Behalf Of ?? Sent: Tuesday, August 24, 2021 9:15 AM To: sr-users(a)lists.kamailio.org Subject: [SR-Users] kazoo error Dear sir: I have some problems。the kamailio version is 5.3.0. My linux version is centos 7. the kamailio log: ERROR: kazoo [kz_amqp.c:2238]: kz_amqp_send_ex(): Failed to publish -9 : a socket error occurred ERROR: kazoo [kz_amqp.c:2707]: kz_amqp_publisher_send(): error sending publish to zone : local , connection id : 1, uri : amqp://admin The connection between kamailio and rabbitmq was interrupted, which caused the queue of MQ to be blocked and the message could not be consumed。