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>E.53. Release 9.0.21</A
></H1
><DIV
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><P
><B
>Release date: </B
>2015-06-04</P
></DIV
><P
> This release contains a small number of fixes from 9.0.20.
For information about new features in the 9.0 major release, see
<A
HREF="release-9-0.html"
>Section E.74</A
>.
</P
><P
> The <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> community will stop releasing updates
for the 9.0.X release series in September 2015.
Users are encouraged to update to a newer release branch soon.
</P
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><A
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>E.53.1. Migration to Version 9.0.21</A
></H2
><P
> A dump/restore is not required for those running 9.0.X.
</P
><P
> However, if you are upgrading from a version earlier than 9.0.18,
see <A
HREF="release-9-0-18.html"
>Section E.56</A
>.
</P
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>E.53.2. Changes</A
></H2
><P
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><UL
><LI
><P
> Avoid failures while <CODE
CLASS="FUNCTION"
>fsync</CODE
>'ing data directory during
crash restart (Abhijit Menon-Sen, Tom Lane)
</P
><P
> In the previous minor releases we added a patch to <CODE
CLASS="FUNCTION"
>fsync</CODE
>
everything in the data directory after a crash. Unfortunately its
response to any error condition was to fail, thereby preventing the
server from starting up, even when the problem was quite harmless.
An example is that an unwritable file in the data directory would
prevent restart on some platforms; but it is common to make SSL
certificate files unwritable by the server. Revise this behavior so
that permissions failures are ignored altogether, and other types of
failures are logged but do not prevent continuing.
</P
></LI
><LI
><P
> Remove <SPAN
CLASS="APPLICATION"
>configure</SPAN
>'s check prohibiting linking to a
threaded <SPAN
CLASS="APPLICATION"
>libpython</SPAN
>
on <SPAN
CLASS="SYSTEMITEM"
>OpenBSD</SPAN
> (Tom Lane)
</P
><P
> The failure this restriction was meant to prevent seems to not be a
problem anymore on current <SPAN
CLASS="SYSTEMITEM"
>OpenBSD</SPAN
>
versions.
</P
></LI
><LI
><P
> Allow <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> to use TLS protocol versions beyond v1
(Noah Misch)
</P
><P
> For a long time, <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> was coded so that the only SSL
protocol it would allow was TLS v1. Now that newer TLS versions are
becoming popular, allow it to negotiate the highest commonly-supported
TLS version with the server. (<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> servers were
already capable of such negotiation, so no change is needed on the
server side.) This is a back-patch of a change already released in
9.4.0.
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