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When the sstate is accessed via HTTP, the existence check can fail due to network issues, in which case bitbake silently continues without sstate. One such network issue is an HTTP server like Python's own SimpleHTTP which closes the TCP connection despite an explicit "Keep-Alive" in the HTTP request header. The server does that without a "close" in the HTTP response header, so the socket remains in the connection cache, leading to "urlopen failed: <urlopen error [Errno 9] Bad file descriptor>" (only visible in "bitbake -D -D" output) when trying to use the cached connection again. The connection might also get closed for other reasons (proxy, timeouts, etc.), so this is something that the client should be able to handle. This is achieved by checking for the error, removing the bad connection, and letting the check_status() method try again with a new connection. It is necessary to let the second attempt fail permanently, because bad proxy setups have been observed to also lead to such broken connections. In that case, we need to abort for real after trying twice, otherwise a build would just hang forever. [YOCTO #11782] (Bitbake rev: 6fa07752bbd3ac345cd8617da49a70e0b2dd565f) Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with IDE integration.
Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions of OpenEmbedded. It is distro-less (can build a functional image with DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website: http://www.openembedded.org/
Where to Send Patches
As Poky is an integration repository (built using a tool called combo-layer), patches against the various components should be sent to their respective upstreams:
bitbake: Git repository: http://git.openembedded.org/bitbake/ Mailing list: bitbake-devel@lists.openembedded.org
documentation: Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/ Mailing list: yocto@yoctoproject.org
meta-poky, meta-yocto-bsp: Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp) Mailing list: poky@yoctoproject.org
Everything else should be sent to the OpenEmbedded Core mailing list. If in doubt, check the oe-core git repository for the content you intend to modify. Before sending, be sure the patches apply cleanly to the current oe-core git repository.
Git repository: http://git.openembedded.org/openembedded-core/
Mailing list: openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of oe-core and poky-specific files.