Veritas NetBackup™ CloudPoint Install and Upgrade Guide

CloudPoint agent fails to connect to the CloudPoint server if the agent host is restarted abruptly

This issue may occur if the host where the CloudPoint agent is installed is shut down abruptly. Even after the host restarts successfully, the agent fails to establish a connection with the CloudPoint server and goes into an offline state.

The agent log file contains the following error:

flexsnap-agent-onhost[4972] MainThread flexsnap.connectors.rabbitmq:
ERROR - Channel 1 closed unexpectedly: 
(405) RESOURCE_LOCKED - cannot obtain exclusive access to locked queue '
flexsnap-agent.a1f2ac945cd844e393c9876f347bd817' in vhost '/'

This issue occurs because the RabbitMQ connection between the agent and the CloudPoint server does not close even in case of an abrupt shutdown of the agent host. The CloudPoint server cannot detect the unavailability of the agent until the agent host misses the heartbeat poll. The RabbitMQ connection remains open until the next heartbeat cycle. If the agent host reboots before the next heartbeat poll is triggered, the agent tries to establish a new connection with the CloudPoint server. However, as the earlier RabbitMQ connection already exists, the new connection attempt fails with a resource locked error.

As a result of this connection failure, the agent goes offline and leads to a failure of all snapshot and restore operations performed on the host.

Workaround:

Restart the Veritas CloudPoint Agent service on the agent host.