[HDDS-11670] SCM container placement policies should check for duplicate hostnames while allocating pipelines

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: SCM
• Assignee: Swaminathan Balachandran
• Reporter: Swaminathan Balachandran
• Created: 08/Nov/24 16:58
• Updated: 08/Nov/24 16:58

Description

SCM container placement policies should check for duplicate hostnames while allocating pipelines. This can happen when a volume containing datanode.id.dir fails and reinitializes the datanode on restart. This could lead to SCM containing 2 nodes with the same ip & hostname but different datanode.id. This can happen because datanode.id is the primary identifier of a datanode in SCM. On pipeline allocation there is a possiblity of these 2 nodes getting picked up in a timeframe where the old node has not been marked dead and the new node has been registered.