ArrayIndexOutOfBoundsException about learning-examples HOT 4 CLOSED

This is because you have to set the argument of the FTPServer (which you need to run before your run the client):

https://github.com/axel22/learning-scala-concurrency/blob/master/src/main/scala/org/learningconcurrency/ch9/FTPClient.scala#L305

This will be explained in detail in the book, but I will add some error handling to produce a reasonable error message if you don't specify the server address.

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More precisely, you should run the server first:

> run 12345

and select the FTPServer program from the list.
Then, you should run the client:

> run 127.0.0.1:12345

and select the FTPClient program from the list.

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Got it! Thank you @axel22 for explanation.

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Maybe input arguments should be treated with better error messages. I'll fix this in the coming days.

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