Cluster Node Properties

Configure these properties for cluster nodes.


Property	Description
nifi.cluster.is.node	Set this to `true` if the instance is a node in a cluster. The default value is `false`.
nifi.cluster.node.address	The fully qualified address of the node. It is blank by default.
nifi.cluster.node.protocol.port	The node's protocol port. It is blank by default.
nifi.cluster.node.protocol.threads	The number of threads that should be used to communicate with other nodes in the cluster. This property defaults to `10`, but for large clusters, this value may need to be larger.
nifi.cluster.node.protocol.max.threads	The maximum number of threads that should be used to communicate with other nodes in the cluster. This property defaults to `50`.
nifi.cluster.node.event.history.size	When the state of a node in the cluster is changed, an event is generated and can be viewed in the Cluster page. This value indicates how many events to keep in memory for each node. The default value is `25`.
nifi.cluster.node.connection.timeout	When connecting to another node in the cluster, specifies how long this node should wait before considering the connection a failure. The default value is `5 secs`.
nifi.cluster.node.read.timeout	When communicating with another node in the cluster, specifies how long this node should wait to receive information from the remote node before considering the communication with the node a failure. The default value is `5 secs`.
nifi.cluster.node.max.concurrent.requests	The maximum number of outstanding web requests that can be replicated to nodes in the cluster. If this number of requests is exceeded, the embedded Jetty server will return a "409: Conflict" response. This property defaults to `100`.
nifi.cluster.firewall.file	The location of the node firewall file. This is a file that may be used to list all the nodes that are allowed to connect to the cluster. It provides an additional layer of security. This value is blank by default, meaning that no firewall file is to be used.
nifi.cluster.flow.election.max.wait.time	Specifies the amount of time to wait before electing a Flow as the "correct" Flow. If the number of Nodes that have voted is equal to the number specified by the `nifi.cluster.flow.election.max.candidates` property, the cluster will not wait this long. The default value is `5 mins`. Note that the time starts as soon as the first vote is cast.
nifi.cluster.flow.election.max.candidates	Specifies the number of Nodes required in the cluster to cause early election of Flows. This allows the Nodes in the cluster to avoid having to wait a long time before starting processing if we reach at least this number of nodes in the cluster.