Re: orangutan seizes up during isolation-check - Mailing list pgsql-hackers
From | Andrew Dunstan |
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Subject | Re: orangutan seizes up during isolation-check |
Date | |
Msg-id | 54A09E34.4040604@dunslane.net Whole thread Raw |
In response to | Re: orangutan seizes up during isolation-check (Noah Misch <noah@leadboat.com>) |
Responses |
Re: orangutan seizes up during isolation-check
(Noah Misch <noah@leadboat.com>)
|
List | pgsql-hackers |
On 12/28/2014 04:58 PM, Noah Misch wrote: > On Sat, Oct 11, 2014 at 09:07:46AM -0400, Peter Eisentraut wrote: >> On 10/11/14 1:41 AM, Noah Misch wrote: >>> Good question. It would be nice to make the change there, for the benefit of >>> other consumers. The patch's setlocale_native_forked() assumes it never runs >>> in a multithreaded process, but libintl_setlocale() must not assume that. I >>> see a few ways libintl/gnulib might proceed: >> Yeah, it's difficult to see how they might proceed if they keep calling >> into Core Foundation, which might do anything, now or in the future. >> >> I went ahead and submitted a bug report to gettext: >> https://savannah.gnu.org/bugs/index.php?43404 >> >> (They way I understand it is that the files concerned originate in >> gettext and are copied to gnulib.) >> >> Let's see what they say. > The gettext maintainer was open to implementing the setlocale_native_forked() > technique in gettext, though the last visible progress was in October. In any > event, PostgreSQL builds will see older gettext for several years. If > setlocale-darwin-fork-v1.patch is not wanted, I suggest making the postmaster > check during startup whether it has become multithreaded. If multithreaded: > > FATAL: postmaster became multithreaded during startup > HINT: Set the LC_ALL environment variable to a valid locale. > > I wondered whether to downgrade FATAL to LOG in back branches. Introducing a > new reason to block startup is disruptive for a minor release, but having the > postmaster deadlock at an unpredictable later time is even more disruptive. I > am inclined to halt startup that way in all branches. Yeah. It should be easily fixable, AIUI, and startup is surely a good and obvious time to to that. > >> I like the idea of calling pthread_is_threaded_np() as a verification. >> This appears to be a OS X-specific function at the moment. If other >> platforms start adding it, then we'll run into the usual problems of how >> to link binaries that use pthread functions. Maybe that's not a >> realistic concern. > True. As written, "configure" will report the function unavailable if it > requires threading libraries. For a measure that's just a backstop against > other bugs, that may be just right. > > > I would like to go ahead and commit setlocale-main-harden-v1.patch, which is a > good thing to have regardless of what happens with gettext. > I'm OK with this, but on its own it won't fix orangutan's problems, will it? cheers andrew
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