When I use 4.3.4 shell to connect to 4.0.16 server I see this in the console:
carbon% mongo --port 14020
{"t":{"$date":"2020-03-18T04:10:34.705Z"},"s":"I", "c":"NETWORK", "id":23014,"ctx":"main","msg":"{foStatus_reason}","attr":{"foStatus_reason":"TCP FastOpen support requested, but disabled in kernel. Set /proc/sys/net/ipv4/tcp_fastopen to 3"}}
MongoDB shell version v4.3.4
connecting to: mongodb://127.0.0.1:14020/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("4f9892ef-1bf7-4416-9e6a-b97f311fa161") }
MongoDB server version: 4.0.16
WARNING: shell and server versions do not match
Server has startup warnings:
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten]
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten]
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** WARNING: This server is bound to localhost.
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** Remote systems will be unable to connect to this server.
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** Start the server with --bind_ip <address> to specify which IP
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** addresses it should serve responses from, or with --bind_ip_all to
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** bind to all interfaces. If this behavior is desired, start the
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten] ** server with --bind_ip 127.0.0.1 to disable this warning.
2020-03-18T00:10:26.404-0400 I CONTROL [initandlisten]
The first line of the output, I presume, comes from the shell:
{"t":{"$date":"2020-03-18T04:10:34.705Z"},"s":"I", "c":"NETWORK", "id":23014,"ctx":"main","msg":"{foStatus_reason}","attr":{"foStatus_reason":"TCP FastOpen support requested, but disabled in kernel. Set /proc/sys/net/ipv4/tcp_fastopen to 3"}}
MongoDB shell version v4.3.4
connecting to: mongodb://127.0.0.1:14020/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("4f9892ef-1bf7-4416-9e6a-b97f311fa161") }
It is my understanding that the shell is meant to primarily be used by humans rather than be driven by software (the software generally will use a driver rather than the shell). Therefore my expected behavior is:
As a user of the shell, I expect the shell to produce its output in a format that is easily human-readable.
While it is certainly possible for a human to read json server logs, I do not consider them to be in a format that is easy for a human to read (I listed why I do not consider json logs to be easy to read in https://jira.mongodb.org/browse/SERVER-46911).
- is duplicated by
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SERVER-47362 mongo shell emits replica set monitor messages every 10 seconds
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- Closed
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- is related to
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SERVER-46911 Allow logging to pipe
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- Closed
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- related to
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SERVER-48100 "mongo" command line in 4.4.0-rc[0-5] prints TCP Fast Open warning to stdout
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- Closed
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