RFR: 1148: Emails on mailing lists are not posted to GitHub PR

[Kevin Rushforth]

On Tue, 31 Aug 2021 19:06:29 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

> For a bit over a month, the mlbridge bot seems to be having trouble posting emails as comments in PRs. Especially the hotspot-dev list has been experiencing this. This patch should fix that problem.
> 
> The reading of the mailing list archives happens in MailmanListReader::conversations. There we loop over mailing lists and months. If a particular archive file (combo of mailing list and month) does not exist, the inner loop breaks. This break is the bug. In our case, the mailing list ide-support-dev does not have any emails for August and (I think because of that) the URL https://mail.openjdk.java.net/pipermail/ide-support-dev/2021-August.txt returns 404. This is triggering the break, which is stopping the inner loop (which loops over mailing lists) so it never gets to hotspot-dev (and a few others).
> 
> Looking at the history, this broke in SKARA-843, where the inner loop was added. The break statements then started acting on the wrong loop.
> 
> I'm also improving some log messages which I needed while debugging this.

Looks good.

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Marked as reviewed by kcr (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/1212