SHARD_RESERVED_PRIOR_INIT_PLACEMENT_CWOBJ4806=CWOBJ4806I: Shard {0} was reserved on container {1} prior to initial placement. The shard is going to be placed into this container when the initial placement occurs.
Explanation
A shard was reserved on the container, but initial placement did not occur. Initial placement can be gated by several factors. The number of started containers that remain are less than the configured number of numInitialContainers is the most common.
User response
If numInitialContainers is configured, start enough containers to trigger placement. See the Deployment topology configuration section in the information center for more information on numInitialContainers and deployment policies.