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Several processes could invoke adjust_log_writes, which
could cause overload reports.
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* maint-20:
Updated OTP version
Prepare release
Updated the engine load functionality
Clean up bag index tables
Conflicts:
OTP_VERSION
lib/crypto/c_src/crypto.c
lib/crypto/doc/src/notes.xml
lib/crypto/vsn.mk
lib/mnesia/doc/src/notes.xml
lib/mnesia/vsn.mk
otp_versions.table
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Index records for bag tables with ram_copies was not deleted
after "real" objects where deleted and thus a memory leak.
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* upstream/pr/1858:
Fix delete_object and write convergence in transaction.
OTP-15231
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
crypto: Fix crash in compute_key(ecdh, ...) on badarg
Relax add_table_copy restriction
Fixed #Ref ordering bug
Test #Ref ordering in lists and ets
Do NOT disc_load from ram_copies when master_node is set
ssl: Make sure that a correct cipher suite is selected
ssl: Correct handling of empty server SNI extension
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* dgud/mnesia/add_table_copy_ram/OTP-15226:
Relax add_table_copy restriction
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Allow to add replicas even if all other replicas are down when the
other replicase are not stored on disk.
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Setting master_nodes to a node with ram_copies replica and
that node had not loaded the table, could cause it load an
empty table, even though (non master) nodes had disc_replicas.
This meant that tables where unexpected empty after multiple failures
happened. When this happen do not load the table and wait for user
to force_load it on some node, preferably with a disk copy.
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Fix a bug, when delete_object was deleting the record if it was written
in the same transaction even if it was written to a different value.
To verify:
%% Create a set table
mnesia:create_table(foo, []).
%% Write and delete_object in transaction
mnesia:transaction(fun() ->
mnesia:write({foo, bar, one}),
mnesia:delete_object({foo, bar, not_one})
end).
{atomic, [{foo, bar, one}]} = mnesia:transaction(fun() -> mnesia:read(foo, bar) end).
Added a section to isolation tests to check for non-matching delete_object
requests.
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make erlang:process_info/1 not retrieve messages
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process_info/1 retrieves a number of properties related to a process,
including the list of messages in its mailbox. This is potentially
unsafe if the target process has a large number of queued messages:
- there is no a priori upper bound on the amount of memory being
allocated to hold that list, and
- the loop to retrieve the messages is uninterruptible, so the
Erlang scheduler where this executes blocks for the duration
We've seen process_info/1 bring down heavily loaded nodes on more
than one occasion. At least once it appeared to have blocked the
Erlang heart process from executing, causing the external heart to
kill the VM.
Consequently this removes 'messages' from the list of process_info
tags to retrieve for process_info/1. Note that process_info/1 still
retrieves 'message_queue_len', and process_info/2 can still retrieve
'messages' when asked to.
A few places in the OTP libraries need minor adjustments, since they
want 'message_queue_len' but compute it from the length of the list
of messages.
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Take care of the call of erlang:get_stacktrace() in
module mnesia_lib.
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The remaining call (in module mnesia_lib) is taken care
of in the following commit.
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* maint:
Updated OTP version
Prepare release
mnesia: Fix checkpoint crash
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* dgud/mnesia/checkpoint-crash/OTP-14841:
mnesia: Fix checkpoint crash
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* dgud/mnesia/slow-startup/OTP-14829:
mnesia: Read schema user properties directly
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Bad timing can cause retain messages to go to a new process if
checkpoint name is reused directly and the checkpoints contain
different tables.
Ignore those messages instead of crash.
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* maint:
Updated OTP version
Prepare release
mnesia: Read schema user properties directly
ssh: testcases for space trailing Hello msg
ssh: Don't remove trailing WS in Hello msg
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* maint-19:
Updated OTP version
Prepare release
mnesia: Read schema user properties directly
ssh: testcases for space trailing Hello msg
ssh: Don't remove trailing WS in Hello msg
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* dgud/mnesia/slow-startup/OTP-14829:
mnesia: Read schema user properties directly
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Doing a proper transaction handling of user properties (in current
implmenentation) caused schema_transactions to be quadratic which
caused huge startup times for nodes with many tables since the merge schema
is a schema_transaction.
Do a direct read instead, cheap but implies that the plugin changes
will not be visible until the changes are commited and cannot be used
later in same transaction, which was possible before if undocumented
functions where used.
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* maint:
mnesia: Fix error handling in abort write
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* dgud/mnesia/backup-error-handling/OTP-14776:
mnesia: Fix error handling in abort write
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* maint:
Fix type create_option() in mnesia
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The create_option() type in mnesia lacks the user_properties field
which is used by mnesia in various places.
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The "root cause" error reason was lost when abort_write failed,
e.g. file was already closed, and Mod:abort_write(..) returned an
error.
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~tw and new string functions are new since OTP-20 (stdlib-3.4)
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It is not used anymore, snmp indecies are now ets tables and not processes.
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Which may hang if an application start does wait for tables
during initilization.
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* maint:
Updated OTP version
Prepare release
Fixed crash when a table was deleted during checkpoint traversal
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Set fixtable false will fail on deleted tables, catch that and also
report checkpoint deactivate error, so user can see why checkpoint
was deactivated and backup fails.
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The module mnesia_frag_old_hash utilized the broken erlang:hash/2 function
which has been deprecated for a long time. Since erlang:hash/2 is now removed
there is no point in having this module any more.
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* maint:
Use off_heap memory queue for mnesia_tm
Preserve key order in mnesia:table_info
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* richcarl/mnesia/table_info_order:
Preserve key order in mnesia:table_info
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Helps when mnesia_tm gets drowned in dirty_writes from remote node.
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* dgud/mnesia/type-specs:
Add basic spec and types
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Continuations returned from mnesia_ext backends were originally wrapped with
the backend module, but that was a remnant of the earliest implementation,
and is not actually needed, since Mnesia already knows what the table
storage type is when it applies the continuation. When mnesia_ext was ported
to OTP 19, the wrapper got changed to use the table type alias instead of
the module, which triggered an error in the mnesia_eleveldb backend. This
patch removes the wrapping completely.
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To separate concerns and reduce confusion, avoid implementing two
behaviours in a single module. Make a single start_link() helper in
mnesia_sup and remove the unused mnesia_sup:start() utility function.
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