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... addressing PR comment
https://github.com/erlang/otp/pull/1752#pullrequestreview-107945563
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From https://tools.ietf.org/html/rfc7230#section-6.6
> A client that receives a "close" connection option MUST cease
sending requests on that connection and close the connection after
reading the response message containing the "close"; if additional
pipelined requests had been sent on the connection, the client
SHOULD NOT assume that they will be processed by the server.
Notes on tests:
* The new tests are added only in group sim_http and not sim_https
because the same test approach appears to be not valid because when
processing the first response the server already sent data (> 0) for
the TLS/SSL handshake;
* The order of tests is relevant as it appears some test cases leave
reusable sessions behind.
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It looks like a typo, though I did not experience impact of this on
tests.
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... i.e. references to `connect_failed` and `send_failed`, unused
since 5d32eaf750 .
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* rickard/signals/OTP-14589:
Fix VM probes compilation
Fix lock counting
Fix signal order for is_process_alive
Fix signal handling priority elevation
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Fix a simple typo in xmerl documentation
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* hans/ssh/exec_fun_mfa/OTP-14851:
ssh: Document the exec option
ssh: Simplification of using fun:s as exec subsystems
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* hans/ssh/doc_fix_shell_return/OTP-14880:
ssh: Doc fix
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to only suggest missing OpenSSL if dlopen fails (load_failed).
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Point out the correct line in an exception for a bad generator
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* maint:
Updated OTP version
Update release notes
Update version numbers
ssh: Fix bad spec for double_algs() in ssh.hrl
Test event insert from init
Fix init to allow all actions
Conflicts:
OTP_VERSION
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just to make it easier to do "rm -rf"
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* hans/ssh/spec_double_algs/OTP-14990:
ssh: Fix bad spec for double_algs() in ssh.hrl
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maint-20
* raimo/stdlib/fix-gen_statem-init-actions-check/OTP-13995:
Test event insert from init
Fix init to allow all actions
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When a generator in a list comprehension was given some
other term than a list, the wrong line could be pointed
out in the exception. Here is an example:
bad_generator() ->
[I || %%This line would be pointed out.
I <- not_a_list].
https://bugs.erlang.org/browse/ERL-572
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statistics(runtime) does not seem to work on some virtual machines.
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Implementation of true asynchronous signaling between processes
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Communication between Erlang processes has conceptually always been
performed through asynchronous signaling. The runtime system
implementation has however previously preformed most operation
synchronously. In a system with only one true thread of execution, this
is not problematic (often the opposite). In a system with multiple threads
of execution (as current runtime system implementation with SMP support)
it becomes problematic. This since it often involves locking of structures
when updating them which in turn cause resource contention. Utilizing
true asynchronous communication often avoids these resource contention
issues.
The case that triggered this change was contention on the link lock due
to frequent updates of the monitor trees during communication with a
frequently used server. The signal order delivery guarantees of the
language makes it hard to change the implementation of only some signals
to use true asynchronous signaling. Therefore the implementations
of (almost) all signals have been changed.
Currently the following signals have been implemented as true
asynchronous signals:
- Message signals
- Exit signals
- Monitor signals
- Demonitor signals
- Monitor triggered signals (DOWN, CHANGE, etc)
- Link signals
- Unlink signals
- Group leader signals
All of the above already defined as asynchronous signals in the
language. The implementation of messages signals was quite
asynchronous to begin with, but had quite strict delivery constraints
due to the ordering guarantees of signals between a pair of processes.
The previously used message queue partitioned into two halves has been
replaced by a more general signal queue partitioned into three parts
that service all kinds of signals. More details regarding the signal
queue can be found in comments in the erl_proc_sig_queue.h file.
The monitor and link implementations have also been completely replaced
in order to fit the new asynchronous signaling implementation as good
as possible. More details regarding the new monitor and link
implementations can be found in the erl_monitor_link.h file.
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* bjorn/misc-beam-fixes:
Correctly handle get_map_elements with a literal map
core_parse: Fix handling of negative sizes in binaries
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Remove unused cerl_messagean module
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kernel: in the group added processing of 'EXIT' signal from shell
OTP-14991
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stdlib: Add function lists:search/2
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Short-circuit code:ensure_loaded for already-loaded modules
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More typos
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* john/erts/fix-set-owner-group/ERL-589:
Fix file:change_group/change_owner
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A literal negative size in binary construction would cause a crash.
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* bjorn/compiler/misc-fixes:
Teach beam_utils:replace_labels/4 to handle recv_{mark,set}
v3_kernel: Stop ensuring one return value in #k_try{}
v3_kernel_pp: Print return variables for #k_try{}
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It wasn't possible to change group/owner separately, and our test
suite lacked coverage for that.
ERL-589
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* hans/ssh/faster_app_stop/OTP-14988:
ssh: Remove deadlock in supervisor tree
ssh: Remove spawn in ssh_system_sup:stop_system/1
ssh: Removed unused sshc_sup:stop_child/1
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* hans/ssh/cuddle_tests_master:
ssh: Join basic and renegotiation suites and parallelize
ssh: Parallelize ssh_basic_SUITE
ssh: Parallelize ssh_renegotiate_SUITE
ssh: Fix non-working test + add log in test suite
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