error: timeout on transient error: Could not connect to the server 127.0.0.1:8333 (error code 1 - "EOF reached") #27121

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<!-- Describe the issue -->

When I'm trying to use bitcoin-cli while bitcoind running it displays error message :

Make sure the bitcoind server is running and that you are connecting to the correct RPC port.```

<!--- What behavior did you expect? -->

running command : `bitcoin-cli getblockchaininfo` 

<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->

` bitcoind -txindex `
```[...] 2023-02-17T18:03:20Z Bound to 127.0.0.1:8334
2023-02-17T18:03:20Z Bound to [::]:8333
2023-02-17T18:03:20Z Bound to 0.0.0.0:8333
[...] ```

<!--- How reliably can you reproduce the issue, what are the steps to do so? -->

I am on MacOS Ventura 13.1 intel i5 MacBook Pro.

<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->

`2023-02-17T18:03:07Z Bitcoin Core version v24.0.1 (release build)`


<!-- Any extra information that might be useful in the debugging process. -->

I saw a related issue few years ago and apparently this issue should to be patched. 

How reliably can you reproduce the issue, what are the steps to do so?

Hello,

Now it's solved but initially it was only : launch bitcoind In another window launching bitcoin-cli getblockchaininfo command.

What weird was the absence of message : bitcoin-cli command not found.

Because now I think it's because I didn't call the path where is bin/bitcoin-cli.

Or maybe because the chain didn't finished to load and so I should wait.

I don't know exactly but now it's solve I will close it.

Thank you very much for your answer !!🙌

Adding more context to this closed issue in case other people stumble on it too.

I was able to reproduce this error with a script running Bitcoin Core 25.0 and 24.0.1 (x86_64-linux-gnu on Ubuntu).

Steps to reproduce:

1. Delete the data directory.
2. Launch bitcoin-qt --server.
3. Immediately check the chain state with bitcoin-qt getblockchaininfo.

The RPC server doesn't have enough time to initialize, so the call to port 8333 fails.

Fixed the issue by using the rpcwait option: bitcoin-cli --rpcwait getblockchaininfo