Avamar：MCS 无法启动，并报告“无法连接到节点 rabbit@localhost： nodedown”

在管理控制台服务 （MCS） 重新启动期间，将记录异常消息： (/usr/local/avamar/var/mc/server_log/mcserver.log.0)

Caused by: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused
        at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:51)
        at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:185)
        at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:228)
        at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils$1.createConnection(ConnectionFactoryUtils.java:77)
        at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.doGetTransactionalResourceHolder(ConnectionFactoryUtils.java:125)
        at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.getTransactionalResourceHolder(ConnectionFactoryUtils.java:67)
        at org.springframework.amqp.rabbit.connection.RabbitAccessor.getTransactionalResourceHolder(RabbitAccessor.java:102)
        at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:618)
        at org.springframework.amqp.rabbit.core.RabbitAdmin.declareQueue(RabbitAdmin.java:133)
        at com.avamar.mc.jms.push.JmsPushService.enable(JmsPushService.java:418)
        at com.avamar.mc.jms.push.JmsPushService.start(JmsPushService.java:191)
        at com.avamar.asn.service.ServiceContainerImpl.installService(ServiceContainerImpl.java:472)
        ... 6 more

而 Rabbimq 状态报告错误： Unable to connect to node rabbit@localhost: nodedown

service rabbitmq-server status

Status of node rabbit@localhost ...
Error: unable to connect to node rabbit@localhost: nodedown 

已启用 Backup and Recovery Manager （BRM）：

grep Brm /usr/local/avamar/var/mc/server_data/prefs/mcserver.xml

<entry key="enableBrmService" value="true" /> 

原因未知，但下面提供了潜在的解决方法。

1.以“管理员”身份登录到 Avamar 实用程序节点。

2.提升到 root 权限。

3.重命名 /usr/local/avamar/var/rabbitmq/mnesia 目录：

mv /usr/local/avamar/var/rabbitmq/mnesia /usr/local/avamar/var/rabbitmq/mnesia.`date +%y%m%d` 

4.重新启动 rabbitmq：

service rabbitmq-server start 

5.请验证 /usr/local/avamar/var/rabbitmq/mnesia 目录存在：

ls -ld /usr/local/avamar/var/rabbitmq/mnesia* 

示例输出：

drwxr-x--- 4 rabbitmq rabbitmq 97 Jul 21 19:46 /usr/local/avamar/var/rabbitmq/mnesia
drwxr-xr-x 4 rabbitmq rabbitmq 97 Jan 22 16:30 /usr/local/avamar/var/rabbitmq/mnesia.250721

6.根据 Avamar 重新启动 MCS：如何重新启动 Management Console 服务器。