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Breaking changes in 7.1

This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 7.1.

HTTP changes

Deprecation of old HTTP settings

The http.tcp_no_delay setting is deprecated in 7.1. It is replaced by http.tcp.no_delay.

Network changes

Deprecation of old network settings

The network.tcp.connect_timeout setting is deprecated in 7.1. This setting was a fallback setting for transport.connect_timeout. To change the default connection timeout for client connections, modify transport.connect_timeout.

Transport changes

Deprecation of old transport settings

The following settings are deprecated in 7.1. Each setting has a replacement setting that was introduced in 6.7.

transport.tcp.port is replaced by transport.port
transport.tcp.compress is replaced by transport.compress
transport.tcp.connect_timeout is replaced by transport.connect_timeout
transport.tcp_no_delay is replaced by transport.tcp.no_delay
transport.profiles.profile_name.tcp_no_delay is replaced by transport.profiles.profile_name.tcp.no_delay
transport.profiles.profile_name.tcp_keep_alive is replaced by transport.profiles.profile_name.tcp.keep_alive
transport.profiles.profile_name.reuse_address is replaced by transport.profiles.profile_name.tcp.reuse_address
transport.profiles.profile_name.send_buffer_size is replaced by transport.profiles.profile_name.tcp.send_buffer_size
transport.profiles.profile_name.receive_buffer_size is replaced by transport.profiles.profile_name.tcp.receive_buffer_size

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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/breaking-changes-7.1.html