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I was going through application_controller.erl looking for why
something was behaving a certain way, saw a comment about removing
this duplicated code one day, and decided to move that a step forward.
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If the Config given to application_controller:change_application_data
included other config files, it was only expanded for already existing
(loaded) applications. If an upgrade added a new application which had
config data in an included config file, the new application did not
get correct config data.
This is now changed so config data will be expanded for all
applications.
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* josevalim/jv-persistent-set-env:
Allow persistent option on set_env/4 and unset_env/3
OTP-11708
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An environment key set with the persistent option will not
be overridden by the ones configured in the application resource
file on load. This means persistent values will stick after the
application is loaded and also on application reload.
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This is what a sample crash message looks like before applying patch:
Kernel pid terminated (application_controller)
({application_start_failure,cmp,{{bad_return_value,
{doc_root_not_exists,[46,47,119,119,119]}},{cmp_app,start,[normal,[]]}}})
This is what a sample crash message looks like after applying patch:
Kernel pid terminated (application_controller)
({application_start_failure,cmp,{{bad_return_value,
{doc_root_not_exists,"./www"}},{cmp_app,start,[normal,[]]}}})
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It was possible to insert {Mod::atom(),Vsn::term()} instead of
Mod::atom() in the modules list in a .app file. This was not visible
in the documentation of .app files, but it was visible in the
documentation of application:load/[1,2] (where the .app file term can
be used directly as first argument).
The Vsn part was never used, so this possibility has now been removed.
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When a node is shutting down, application_controller will do
exit(Pid,shutdown) on all application masters, and wait for
{'EXIT',Pid,_}. If, for some reason, the application master does not
terminate then application_controller will hang forever waiting for
this 'EXIT' message.
To overcome this problem, a configurable timer is added to kernel -
the enviroment variable 'shutdown_timeout'. If this variable is set to
a positive integer T, application_controller will do exit(Pid,kill)
after T milli seconds if no 'EXIT' message is received.
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* ks/types:
file.hrl: Move out type declarations
kernel: Add types and specs
OTP-8494 ks/types
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