Spring Boot 2.3.0 M4 Configuration Changelog

Table 1. Deprecated keys in 2.3.0.M4

Key	Replacement	Reason
server.jetty.acceptors	server.jetty.threads.acceptors
server.jetty.max-queue-capacity	server.jetty.threads.max-queue-capacity
server.jetty.max-threads	server.jetty.threads.max
server.jetty.min-threads	server.jetty.threads.min
server.jetty.selectors	server.jetty.threads.selectors
server.jetty.thread-idle-timeout	server.jetty.threads.idle-timeout
server.tomcat.max-threads	server.tomcat.threads.max
server.tomcat.min-spare-threads	server.tomcat.threads.min-spare
server.undertow.io-threads	server.undertow.threads.io
server.undertow.worker-threads	server.undertow.threads.worker
spring.mvc.contentnegotiation.favor-path-extension		Use of path extensions for request mapping and for content negotiation is discouraged.
spring.mvc.pathmatch.use-registered-suffix-pattern		Use of path extensions for request mapping and for content negotiation is discouraged.
spring.mvc.pathmatch.use-suffix-pattern		Use of path extensions for request mapping and for content negotiation is discouraged.

Table 2. New keys in 2.3.0.M4

Key	Default value	Description
management.health.probes.enabled	false	Whether to enable liveness and readiness probes.
server.jetty.threads.acceptors	-1	Number of acceptor threads to use.
server.jetty.threads.idle-timeout	60000ms	Maximum thread idle time.
server.jetty.threads.max	200	Maximum number of threads.
server.jetty.threads.max-queue-capacity		Maximum capacity of the thread pool’s backing queue.
server.jetty.threads.min	8	Minimum number of threads.
server.jetty.threads.selectors	-1	Number of selector threads to use.
server.tomcat.threads.max	200	Maximum amount of worker threads.
server.tomcat.threads.min-spare	10	Minimum amount of worker threads.
server.undertow.threads.io		Number of I/O threads to create for the worker.
server.undertow.threads.worker		Number of worker threads.
spring.couchbase.connection-string		Connection string used to locate the Couchbase cluster.
spring.couchbase.env.io.idle-http-connection-timeout	30s	Length of time an HTTP connection may remain idle before it is closed and removed from the pool.
spring.couchbase.env.io.max-endpoints	12	Maximum number of sockets per node.
spring.couchbase.env.io.min-endpoints	1	Minimum number of sockets per node.
spring.couchbase.env.timeouts.analytics	75s	Timeout for the analytics service.
spring.couchbase.env.timeouts.disconnect	10s	Bucket disconnect timeout.
spring.couchbase.env.timeouts.key-value-durable	10s	Timeout for operations on a specific key-value with a durability level.
spring.couchbase.env.timeouts.management	75s	Timeout for the management operations.
spring.couchbase.env.timeouts.search	75s	Timeout for the search service.
spring.data.couchbase.bucket-name		Name of the bucket to connect to.
spring.data.couchbase.field-naming-strategy		Fully qualified name of the FieldNamingStrategy to use.
spring.data.couchbase.scope-name		Name of the scope used for all collection access.
spring.data.elasticsearch.client.reactive.max-in-memory-size		Limit on the number of bytes that can be buffered whenever the input stream needs to be aggregated.
spring.data.mongodb.replica-set-name		Required replica set name for the cluster.
spring.kafka.admin.security.protocol		Security protocol used to communicate with brokers.
spring.kafka.consumer.security.protocol		Security protocol used to communicate with brokers.
spring.kafka.producer.security.protocol		Security protocol used to communicate with brokers.
spring.kafka.security.protocol		Security protocol used to communicate with brokers.
spring.kafka.streams.security.protocol		Security protocol used to communicate with brokers.
spring.main.cloud-platform		Override the Cloud Platform auto-detection.
spring.redis.lettuce.cluster.refresh.adaptive	false	Whether adaptive topology refreshing using all available refresh triggers should be used.
spring.redis.lettuce.cluster.refresh.period		Cluster topology refresh period.
spring.webflux.base-path		Base path for all web handlers.

Table 3. Removed keys in 2.3.0.M4

Key	Replacement	Reason
spring.couchbase.bootstrap-hosts	spring.couchbase.connection-string
spring.couchbase.bucket.name		A bucket is no longer auto-configured.
spring.couchbase.bucket.password		A bucket is no longer auto-configured.
spring.couchbase.env.bootstrap.http-direct-port
spring.couchbase.env.bootstrap.http-ssl-port
spring.couchbase.env.endpoints.key-value
spring.couchbase.env.endpoints.queryservice.max-endpoints	spring.couchbase.env.io.max-endpoints
spring.couchbase.env.endpoints.queryservice.min-endpoints	spring.couchbase.env.io.min-endpoints
spring.couchbase.env.endpoints.viewservice.max-endpoints	spring.couchbase.env.io.max-endpoints
spring.couchbase.env.endpoints.viewservice.min-endpoints	spring.couchbase.env.io.min-endpoints
spring.couchbase.env.timeouts.socket-connect
spring.data.couchbase.consistency