The Squid HTTP Proxy team is very pleased to announce the availability of the Squid-3.5.22 release! This release is a bug fix release resolving several issues found in the prior Squid releases. The major changes to be aware of: * Bug #4471: revalidation doesn't work when expired cached object lacks Last-Modified header. Historically Squid used only Last-Modified header value for evaluating entry's last modification time while making an internal revalidation requests. So, without Last-Modified it was not possible to correctly fill the If-Modified-Since header value. Which would result in many unnecessary MISS. This release now uses Date header to synthesize a Last-Modified value if none is provided. IMPORTANT: This change affects a binary difference in all cache objects stored. * When upgrading, older cache content is handled automatically. * When downgrading for any reason to an older version the cache will need to be erased and rebuilt from empty to remove those new objects. * Bug #4228: ./configure bug/typo This bug caused Squid ./configure script to incorrectly fail to detect missing but required Heimdal and GNU GSS Kerberos libraries. Squid would build as if it were successful, then not provide the expected Kerberos support and helpers. * Bug #3819: "fd >= 0" assertion in file_write() during reconfiguration This bug shows up as UFS code hitting assertions if it has to log entries or rebuild swap.state during reconfiguration steps. Asynchronous UFS cache_dirs such as diskd were the most exposed, but even blocking UFS caching code could probably hit [rebuild] assertions. The swap.state rebuilding (always initiated at startup) probably did not work as intended if reconfiguration happened during the rebuild time because reconfiguration closed the swap.state file being rebuilt. Squid now protects that swap.state file and delays rebuilding progress until reconfiguration is over. There may be other related issues still present. * Bug #2833: Collapse internal revalidation requests (SMP-unaware caches) This feature extends Collapsed Forwarding to internal revalidation requests. This implementation does not support Vary-controlled cache objects and is limited to SMP-unaware caching environments, where each Squid worker knows nothing about requests and caches handled by other workers. Prior to these changes, multiple concurrent HTTP requests for the same stale cached object always resulted in multiple internal revalidation requests sent by Squid to the origin server. Those internal requests were likely to result in multiple competing Squid cache updates, causing cache misses and/or more internal revalidation requests, negating collapsed forwarding savings. * Bug #4302 pt2: IPFilter v5 transparent interception This bug showed up as NAT lookup failures or strange IP values being returned when IPv6 traffic was intercepted using IPFilter. * Fix logged request size (%http::>st) and other size-related %codes. Squid was previously logging how many bytes it expected the size of HTTP responses to be. Not the actual transferred sizes. On large aborted objects it may be wildly wrong. Also, the %http:: codes used in ICAP logs are related to the HTTP message being delivered over ICAP, not the ICAP message. All users of Squid-3 are encouraged to upgrade to this release as soon as possible. See the ChangeLog for the full list of changes in this and earlier releases. Please refer to the release notes at http://www.squid-cache.org/Versions/v3/3.5/RELEASENOTES.html when you are ready to make the switch to Squid-3.5 Upgrade tip: "squid -k parse" is starting to display even more useful hints about squid.conf changes. This new release can be downloaded from our HTTP or FTP servers http://www.squid-cache.org/Versions/v3/3.5/ ftp://ftp.squid-cache.org/pub/squid/ ftp://ftp.squid-cache.org/pub/archive/3.5/ or the mirrors. For a list of mirror sites see http://www.squid-cache.org/Download/http-mirrors.html http://www.squid-cache.org/Download/mirrors.html If you encounter any issues with this release please file a bug report. http://bugs.squid-cache.org/ Amos Jeffries _______________________________________________ squid-announce mailing list squid-announce@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-announce
