java.net.Socket should report the attempted address and port

[Tobias Thierer]

There was a similar discussion recently:

http://mail.openjdk.java.net/pipermail/net-dev/2017-December/011097.html


On Sun, 22 Apr 2018, 20:59 Péter Gergely Horváth, <
peter.gergely.horvath at gmail.com> wrote:

> Hi All,
>
> I am wondering if it would be possible to make a minor improvement to the
> way *java.net.Socket* reports connectivity errors and incorporate the
> attempted address, port and the timeout used into the exception message.
>
> The current implementation emits a generic error message, which is not
> that helpful when one is operating a _large_ application. (Consider e.g.
> Big Data or complex legacy systems written by someone else).
>
> java.net.ConnectException: Connection refused (Connection refused)
> at java.net.PlainSocketImpl.socketConnect(Native Method)
> at
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
> at
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
> at
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
> at java.net.Socket.connect(Socket.java:589)
> at java.net.Socket.connect(Socket.java:538)
> at java.net.Socket.<init>(Socket.java:434)
> at java.net.Socket.<init>(Socket.java:211)
> at Sample.main(Sample.java:9)
>
>
> I have looked into the JDK code base and implemented a patch that reports
> the address, port and timeout used in the error message without touching
> any native parts (see attached patch file). I have tested this (created my
> own build of the JDK and run a sample application against it) and it seems
> to work properly.
>
> Would it be possible to incorporate this change into the official JDK code
> base? I do believe it would help a lot of people out there.
>
> Based on my understanding, once I have signed the OCA, I should simply
> write an email to the group and request a sponsor to pick up this issue.
> Could someone help me with this?
>
> Thank you,
> Peter
>
>
>
>
>
>
>
>
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