View Source Mnesia Release Notes
This document describes the changes made to the Mnesia system from version to version. The intention of this document is to list all incompatibilities as well as all enhancements and bugfixes for every release of Mnesia. Each release of Mnesia thus constitutes one section in this document. The title of each section is the version number of Mnesia.
Mnesia 4.23.2
Fixed Bugs and Malfunctions
The
mnesia_registry
module have been deprecated.Own Id: OTP-18994
Improvements and New Features
The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955 Aux Id: PR-8026
Mnesia 4.23.1
Fixed Bugs and Malfunctions
Mnesia could crash during startup if
del_table_copy/2
andadd_table_copy/3
was invoked when the table was loading.Own Id: OTP-19076 Aux Id: ERIERL-1073
Mnesia 4.23
Fixed Bugs and Malfunctions
Document
mnesia:foldl/4
andmnesia:foldr/4
.Own Id: OTP-18798
mnesia:add_table_copy/3
no longer fails with reason system_limit when the node is starting.Own Id: OTP-18850
Improvements and New Features
Restore recreate of disc_only tables could crash if they had an index.
Own Id: OTP-18843 Aux Id: GH-7766
Mnesia 4.22.1
Fixed Bugs and Malfunctions
Do not delete old backup file if the new backup fails.
Own Id: OTP-18711 Aux Id: ERIERL-963
Mnesia 4.22
Improvements and New Features
Added debug statistics for active transactions.
Own Id: OTP-18309 Aux Id: PR-6377
The implementation has been fixed to use
proc_lib:init_fail/2,3
where appropriate, instead ofproc_lib:init_ack/1,2
.* POTENTIAL INCOMPATIBILITY *
Own Id: OTP-18490 Aux Id: OTP-18471, GH-6339, PR-6843
Mnesia 4.21.4.3
Fixed Bugs and Malfunctions
Mnesia could crash during startup if
del_table_copy/2
andadd_table_copy/3
was invoked when the table was loading.Own Id: OTP-19076 Aux Id: ERIERL-1073
Mnesia 4.21.4.2
Fixed Bugs and Malfunctions
mnesia:add_table_copy/3
no longer fails with reason system_limit when the node is starting.Own Id: OTP-18850
Mnesia 4.21.4.1
Fixed Bugs and Malfunctions
Do not delete old backup file if the new backup fails.
Own Id: OTP-18711 Aux Id: ERIERL-963
Mnesia 4.21.4
Fixed Bugs and Malfunctions
Improved consistency for dirty writes when a table was added with
add_table_copy/3
.Fixed a problem with sticky write, which could lead to inconsistent data.
Own Id: OTP-18412
Improvements and New Features
Replace size/1 with either tuple_size/1 or byte_size/1
The
size/1
BIF is not optimized by the JIT, and its use can result in worse types for Dialyzer.When one knows that the value being tested must be a tuple,
tuple_size/1
should always be preferred.When one knows that the value being tested must be a binary,
byte_size/1
should be preferred. However,byte_size/1
also accepts a bitstring (rounding up size to a whole number of bytes), so one must make sure that the call tobyte_size/
is preceded by a call tois_binary/1
to ensure that bitstrings are rejected. Note that the compiler removes redundant calls tois_binary/1
, so if one is not sure whether previous code had made sure that the argument is a binary, it does not harm to add anis_binary/1
test immediately before the call tobyte_size/1
.Own Id: OTP-18432 Aux Id: GH-6672,PR-6793,PR-6784,PR-6787,PR-6785,PR-6682,PR-6800,PR-6797,PR-6798,PR-6799,PR-6796,PR-6813,PR-6671,PR-6673,PR-6684,PR-6694,GH-6677,PR-6696,PR-6670,PR-6674
Mnesia 4.21.3
Fixed Bugs and Malfunctions
Fixed crash which could happen during startup if too many decisions where sent from remote nodes.
Own Id: OTP-18319 Aux Id: ERIERL-875
Mnesia 4.21.2
Fixed Bugs and Malfunctions
Don't fill the logs if mnesia can't connect to all nodes, due to partitioned network.
Own Id: OTP-18288 Aux Id: ERIERL-868
Mnesia 4.21.1
Fixed Bugs and Malfunctions
Fixed
add_table_copy
which could leave a table lock if the receiving node went down during the operation.Own Id: OTP-18128 Aux Id: PR-6013
Mnesia 4.21
Improvements and New Features
Documentation fixes.
Own Id: OTP-17930
Mnesia 4.20.4.4
Fixed Bugs and Malfunctions
mnesia:add_table_copy/3
no longer fails with reason system_limit when the node is starting.Own Id: OTP-18850
Mnesia 4.20.4.3
Fixed Bugs and Malfunctions
Do not delete old backup file if the new backup fails.
Own Id: OTP-18711 Aux Id: ERIERL-963
Mnesia 4.20.4.2
Fixed Bugs and Malfunctions
Don't fill the logs if mnesia can't connect to all nodes, due to partitioned network.
Own Id: OTP-18288 Aux Id: ERIERL-868
Fixed crash which could happen during startup if too many decisions where sent from remote nodes.
Own Id: OTP-18319 Aux Id: ERIERL-875
Mnesia 4.20.4.1
Fixed Bugs and Malfunctions
Fixed
add_table_copy
which could leave a table lock if the receiving node went down during the operation.Own Id: OTP-18128 Aux Id: PR-6013
Mnesia 4.20.4
Fixed Bugs and Malfunctions
Fixed
mnesia:add_table_copy/3
so that calling it when mnesia started on another node does not fail or cause hanging nodes.Own Id: OTP-18056
Mnesia 4.20.3
Improvements and New Features
Optimize locker to handle many read locks on the same record.
Own Id: OTP-17973 Aux Id: ERIERL-772
Mnesia 4.20.2
Improvements and New Features
Reduce the number of locks taken during table copying, should reduce the startup time on large systems.
Own Id: OTP-17656 Aux Id: ERIERL-688
Mnesia 4.20.1
Fixed Bugs and Malfunctions
Documentation and minor code cleanup.
Own Id: OTP-17727
Mnesia 4.20
Fixed Bugs and Malfunctions
Fixed that index keys was deleted for set tables when mnesia:delete_object/1 tried to delete a non-existing record.
Own Id: OTP-17564 Aux Id: GH-5040
Improvements and New Features
Optimized table loading and added
max_transfer_size
configuration parameter.Own Id: OTP-17508
Mnesia 4.19.1
Fixed Bugs and Malfunctions
Suppression of deprecation warnings has been added to the source files of the Mnesia application.
Own Id: OTP-17217
Fixed that the backend plugin initialization is done only once.
Own Id: OTP-17294 Aux Id: GH-4525 PR-4674
Mnesia 4.19
Fixed Bugs and Malfunctions
Fixed the type spec for
disc_only_copies
.Own Id: OTP-17249 Aux Id: PR-4578
Do not crash in
mnesia:change_config/2
if mnesia is stopping or starting.Own Id: OTP-17274 Aux Id: GH-4616
Improvements and New Features
Optimized table loading time for tables that are updated during the loading.
Own Id: OTP-17271 Aux Id: PR-4575
Mnesia 4.18.1
Fixed Bugs and Malfunctions
Avoid potential performance issue, if the input queue to
mnesia_tm
is long.Own Id: OTP-17066 Aux Id: PR-2889
Mnesia 4.18
Fixed Bugs and Malfunctions
FIx mnesia delete object handling in transaction storage. In a transaction
mnesia:read/1
could indicate that exiting objects did not exist after another object was deleted.Own Id: OTP-16782 Aux Id: PR-2663
Improvements and New Features
Fixed crash during startup, which could happen if a table was deleted on another node.
Own Id: OTP-16815 Aux Id: ERIERL-500
Mnesia 4.17
Fixed Bugs and Malfunctions
Make
mnesia:create_table/2
return correct badarg value.Own Id: OTP-16072 Aux Id: PR-2320
Fixed a bug where mnesia was sometimes not waiting during start for a commit decision on asymmetric transactions.
Own Id: OTP-16634 Aux Id: PR-2610 ERL-1227
Improvements and New Features
Remove usage and documentation of old requests of the I/O-protocol.
Own Id: OTP-15695
Avoid using
rpc
calls to do table reads, which will reduce the load on rpc server and improve performance.Own Id: OTP-16189
Mnesia 4.16.3.1
Improvements and New Features
Fixed crash during startup, which could happen if a table was deleted on another node.
Own Id: OTP-16815 Aux Id: ERIERL-500
Mnesia 4.16.3
Fixed Bugs and Malfunctions
Fixed a timing issue in uninstall fallback functionality.
Own Id: OTP-16468 Aux Id: ERL-1151
Mnesia 4.16.2
Fixed Bugs and Malfunctions
Fixed mnesia crash which could happen when trying to recover from failures in transactions containing
sticky_locks
.Own Id: OTP-16286 Aux Id: ERL-1077
Fixed mnesia index issue. Could happen when updating records with a index plugin backend.
Own Id: OTP-16291 Aux Id: ERL-1091
Mnesia 4.16.1
Fixed Bugs and Malfunctions
mnesia:add_table_copy/3
could cause a deadlock if called when a new node was starting.Own Id: OTP-15933 Aux Id: ERL-872
Transactions with sticky locks could with async_asym transactions be committed in the wrong order, since asym transaction are spawned on the remote nodes.
To fix this bug the communication protocol between mnesia nodes had to be updated, thus mnesia will no longer be able to connect to nodes earlier than mnesia-4.14 , OTP-19.0.
* POTENTIAL INCOMPATIBILITY *
Own Id: OTP-15979 Aux Id: ERL-768
Mnesia 4.16
Fixed Bugs and Malfunctions
Optimize mnesia:read/1 if data have been written in the same transaction.
Own Id: OTP-15550 Aux Id: PR-2029
Fixed bugs in table index plugin handling.
Own Id: OTP-15689 Aux Id: PR-1695 ERL-556
Improvements and New Features
Optimized dumping of tables with plugin backends.
Own Id: OTP-15588 Aux Id: PR-2102
Include stacktrace in exception if a dirty activity errors, thus if user have matched on the error thrown it may not match any more.
* POTENTIAL INCOMPATIBILITY *
Own Id: OTP-15804 Aux Id: PR-2216
Mnesia 4.15.6
Fixed Bugs and Malfunctions
Avoid overload warnings caused by a race condition.
Own Id: OTP-15619 Aux Id: ERIERL-310
Mnesia 4.15.5
Fixed Bugs and Malfunctions
Fixed type spec for
mnesia:change_config/2
.Own Id: OTP-15201 Aux Id: PR-1881
When master node is set do not force a load from ram_copies replica when there are no available disc_copies, since that would load an empty table. Wait until a disk replica is available or until user explicitly force_loads the table.
Own Id: OTP-15221 Aux Id: ERIERL-217
Allow to add replicas even if all other replicas are down when the other replicas are not stored on disk.
Own Id: OTP-15226 Aux Id: ERIERL-221
Fixed
mnesia:delete_object/1
bug, where delete_object was deleting the record if it was written in the same transaction even if it was written to a different value.Own Id: OTP-15231 Aux Id: PR-1858
Fixed a bug where the bag table index data was not deleted when objects were deleted.
Own Id: OTP-15243
Mnesia 4.15.4
Improvements and New Features
Calls to
erlang:get_stacktrace()
are removed.Own Id: OTP-14861
Mnesia 4.15.3.1
Fixed Bugs and Malfunctions
When master node is set do not force a load from ram_copies replica when there are no available disc_copies, since that would load an empty table. Wait until a disk replica is available or until user explicitly force_loads the table.
Own Id: OTP-15221 Aux Id: ERIERL-217
Allow to add replicas even if all other replicas are down when the other replicase are not stored on disk.
Own Id: OTP-15226 Aux Id: ERIERL-221
Mnesia 4.15.3
Fixed Bugs and Malfunctions
Removed a quadratic behavior in startup. This change implies that backend plugins (if used) must be set when the schema is created or via configuration parameters before mnesia is started.
Own Id: OTP-14829 Aux Id: ERIERL-84
Bad timing could crash mnesia after a checkpoint was deactivated and reactivated with the same checkpoint name on different tables.
Own Id: OTP-14841 Aux Id: ERIERL-113
Mnesia 4.15.2
Fixed Bugs and Malfunctions
Fix backup error handling, the real failure reason was not returned.
Own Id: OTP-14776 Aux Id: ERIERL-103
Mnesia 4.15.1
Improvements and New Features
General Unicode improvements.
Own Id: OTP-14462
Mnesia 4.15
Improvements and New Features
Removed the wrapping of select continuations in extension plugin handling. This might require the user to rewrite user backend plugin if used.
* POTENTIAL INCOMPATIBILITY *
Own Id: OTP-14039
Mnesia 4.14.3
Fixed Bugs and Malfunctions
Fixed crash in checkpoint handling when table was deleted during backup.
Own Id: OTP-14167
Mnesia 4.14.2
Fixed Bugs and Malfunctions
A continuation returned by mnesia:select/[14] should be reusable in different, non-transactional activities.
Own Id: OTP-13944 Aux Id: PR-1184
Fixed crash when calling block_table multiple times. Could happen when having locks for a long time and restarting mnesia.
Own Id: OTP-13970 Aux Id: Seq-13198
Change mnesia_tm process to have off-heap messages since mnesia_tm can be the receiver of many non-synchronized message from other nodes.
Own Id: OTP-14074
Mnesia 4.14.1
Improvements and New Features
Correct some minor documentation issues.
Own Id: OTP-13891
Mnesia 4.14
Improvements and New Features
Added experimental external backend plugin api. This adds the possibility for the user to write other storage backends for data, for example by using shared memory or ram-cached disk storage.
The plugin api may change in future versions after being battle tested.
Own Id: OTP-13058
Mnesia 4.13.4
Fixed Bugs and Malfunctions
Mnesia transactions could hang while waiting on a response from a node who had stopped.
Own Id: OTP-13423
Mnesia 4.13.3
Fixed Bugs and Malfunctions
Avoid deadlock possibility in
mnesia:del_table_copy/2
Own Id: OTP-13284
Mnesia 4.13.2
Fixed Bugs and Malfunctions
Fixed a process and file descriptor leak in mnesia:restore/2.
Own Id: OTP-13025 Aux Id: seq12957
Mnesia 4.13.1
Fixed Bugs and Malfunctions
Improved index updates to avoid a timing glitch in dirty_index_read.
Own Id: OTP-12972
Mnesia 4.13
Fixed Bugs and Malfunctions
Mnesia's dirty functions did not always exit with
{aborted, Reason}
as documented when an error occurred.Own Id: OTP-12714
Consider file descriptors limits (emfile) as a fatal error and do not delete log files. Previously the error was seen as a corrupted disk and the log files deleted which caused data loss.
Own Id: OTP-12807
Improvements and New Features
Make Mnesia DCD dump behavior at start up optional, when turned off mnesia loads large disc_copies tables faster.
Own Id: OTP-12481
Mnesia 4.12.5
Fixed Bugs and Malfunctions
Fixed race condition in protocol negotiation.
Own Id: OTP-12473
Improvements and New Features
Grammar corrections. (Thanks to Derek Brown)
Own Id: OTP-12400
Mnesia 4.12.4
Fixed Bugs and Malfunctions
Fixed a spelling mistake in mnesia documentation.
Own Id: OTP-12278
Matching data with
mnesia:match_object/1
did not work as expected in some cases, when data was written in the same transaction before the matching was invoked.Own Id: OTP-12304 Aux Id: Seq12745
Mnesia 4.12.3
Fixed Bugs and Malfunctions
Various logging fixes, including: Add run queue index to the process dump in crash dumps.
Add thread index to enomem slogan when crashing.
Remove error logger message for sending messages to old instances of the same node.Own Id: OTP-12115
Mnesia 4.12.2
Fixed Bugs and Malfunctions
Fixed a race which could make create_table fail if a node was going down during the transaction.
Own Id: OTP-12124 Aux Id: seq12694
Mnesia 4.12.1
Fixed Bugs and Malfunctions
Force load table could hang when a node went away during start up.
Own Id: OTP-11948 Aux Id: seq12585
The time for inserting locks for a transaction with large number of locks is reduced significantly.
Own Id: OTP-11981
Mnesia 4.12
Fixed Bugs and Malfunctions
Some local implementations of removing the last element from a list are replaced by
lists:droplast/1
. Note that this requires at leaststdlib-2.0
, which is the stdlib version delivered in OTP 17.0. (Thanks to Hans Svensson)Own Id: OTP-11678
Application upgrade (appup) files are corrected for the following applications:
asn1, common_test, compiler, crypto, debugger, dialyzer, edoc, eldap, erl_docgen, et, eunit, gs, hipe, inets, observer, odbc, os_mon, otp_mibs, parsetools, percept, public_key, reltool, runtime_tools, ssh, syntax_tools, test_server, tools, typer, webtool, wx, xmerl
A new test utility for testing appup files is added to test_server. This is now used by most applications in OTP.
(Thanks to Tobias Schlager)
Own Id: OTP-11744
Improvements and New Features
To prevent a race condition if there is a short communication problem when node-down and node-up events are received. They are now stored and later checked if the node came up just before mnesia flagged the node as down. (Thanks to Jonas Falkevik )
Own Id: OTP-11497
Added
mnesia:sync_log/0
to explicit sync mnesias transaction log.Own Id: OTP-11729
Mnesia 4.11
Fixed Bugs and Malfunctions
Fixed a race in mnesia which could cause hanging transaction when sticky locks had been used. Thanks janchochol.
Own Id: OTP-11375
Fixed dirty_update_counter which could return ok, thanks Anton Ryabkov.
Own Id: OTP-11485
Mnesia 4.10
Fixed Bugs and Malfunctions
Fix timing issues in checkpoint creation.
Own Id: OTP-10957
Improvements and New Features
Fixed a problem where the fallback BUP file is removed when calling mnesia:uninstall_fallback and mnesia is not started.
Own Id: OTP-11241
Mnesia 4.9
Fixed Bugs and Malfunctions
If mnesia:clear_table/2 was called during a table load on that table, the schema record was written to the table instead of clearing table.
Own Id: OTP-11030 Aux Id: seq12267
Improvements and New Features
Optimize index creation for Mnesia set tables. Thanks to Nick Marino.
Own Id: OTP-11103
Mnesia 4.8
Fixed Bugs and Malfunctions
Use chained send_after instead of send_interval, to make decrease the number of messages sent after a sleep (Thanks to James Wheare)
Own Id: OTP-10636
Fix format of mnesia overload message (Thanks to Ahmed Omar)
Own Id: OTP-10639
Improvements and New Features
Added a general framework for executing benchmarks of Erlang/OTP. Benchmarks for the Erlang VM and mnesia have been incorporated in the framework.
For details about how to add more benchmarks see $ERL_TOP/HOWTO/BENCHMARKS.md in the source distribution.
Own Id: OTP-10156
Where necessary a comment stating encoding has been added to Erlang files. The comment is meant to be removed in Erlang/OTP R17B when UTF-8 becomes the default encoding.
Own Id: OTP-10630
Remove support for the query keyword and query expressions. Thanks to Loïc Hoguin.
Own Id: OTP-10729
Mnesia 4.7.1
Fixed Bugs and Malfunctions
Add tests showing that trying to delete non-existing object may corrupt the
In case of bag tables, trying to delete a non-existing object leads to the index becoming corrupt. This happens if the non-existing object we try to delete happens to share its key and index field value with a single existing object in the table. Result: The index entry corresponding to the existing object is removed.
Prevent index from being corrupted if a nonexistent item is deleted
We have to ensure that we actually delete the last object with a given (key, index) pair before removing the index. Thanks to Bartlomiej Puzon
Own Id: OTP-10220
Mnesia 4.7
Fixed Bugs and Malfunctions
Returns the same value for mnesia_loader:disc_load_table/2 as mnesia_loader:net_load_table/4 if a table copy cannot be found. (Thanks to Uwe Dauernheim)
Own Id: OTP-10015
Improvements and New Features
Improved table lock algorithm.
Own Id: OTP-9890
Mnesia 4.6
Fixed Bugs and Malfunctions
Reduce calls to phash in key_to_frag_number
Original code calls phash 1..2 times, based on which fragment the hashed key targets and how many fragments exist. New code always calls phash only once.
Add mnesia_frag_hash test (Thanks to Philip Robinson)
Own Id: OTP-9722
Fixed a sticky lock bug which caused mnesia:read(Tab, Key, write) return undefined.
Own Id: OTP-9786
Use the synchronous log_terms instead of alog_terms in mnesia_log:ets2dcd()
This avoids the situation where mnesia could dump a very large ets table in its entirety into the message queue of the disk_log process, causing memory blowup and choking the disk logger. (Thanks to Richard Carlsson)
Own Id: OTP-9804
Improvements and New Features
Implemented a new option to mnesia:create_table/2 which allows the user to assign 'ets' and 'dets' options not available in mnesia.
Own Id: OTP-8970
Mnesia 4.5.1
Fixed Bugs and Malfunctions
Fix deadlock in mnesia:del_table_copy/2.
Own Id: OTP-9689 Aux Id: seq11927
Improvements and New Features
Allow schema operations when using different mnesia versions.
Own Id: OTP-9657 Aux Id: seq11926
Mnesia 4.5
Fixed Bugs and Malfunctions
Fix protocol issues. Mnesia-4.4.19 could not communicate with to older nodes.
Own Id: OTP-9473
XML files have been corrected.
Own Id: OTP-9550 Aux Id: OTP-9541
Improvements and New Features
Dump the log even if no transactions have been invoked on local node, otherwise the log will grow forever with decisions from the other nodes who have tables on disk. Thanks Marek Majkowski.
Own Id: OTP-9551
Use dedicated api for clear_table, i.e. instead of match_delete use delete_all_objects. Thanks KukHyun Lee.
Own Id: OTP-9558
Mnesia 4.4.19
Fixed Bugs and Malfunctions
Mnesia could crash if mnesia:add_table_index/2 was invoked before the table was loaded on all nodes.
Own Id: OTP-9285 Aux Id: seq11844
Add {majority, boolean()} per-table option.
With {majority, true} set for a table, write transactions will abort if they cannot commit to a majority of the nodes that have a copy of the table. Currently, the implementation hooks into the prepare_commit, and forces an asymmetric transaction if the commit set affects any table with the majority flag set. In the commit itself, the transaction will abort if it cannot satisfy the majority requirement for all tables involved in the transaction.(Thanks to Ulf Wiger)
Own Id: OTP-9304
Mnesia 4.4.18
Fixed Bugs and Malfunctions
Call chmod without the "-f" flag
"-f" is a non-standard chmod option which at least SGI IRIX and HP UX do not support. As the only effect of the "-f" flag is to suppress warning messages, it can be safely omitted. (Thanks to Holger Weiß)
Own Id: OTP-9170
Mnesia sometimes failed to update meta-information in large systems, which could cause table content to be inconsistent between nodes.
Own Id: OTP-9186 Aux Id: seq11728
Mnesia 4.4.17
Fixed Bugs and Malfunctions
Calling mnesia:first/1 on empty fragmented table works. Thanks Magnus Henoch.
Own Id: OTP-9108
If Mnesia detects that the network is not fully connected during start, Mnesia will not start until all nodes are reachable.
Own Id: OTP-9115 Aux Id: seq-11728
Improvements and New Features
Fix issues reported by dialyzer.
Own Id: OTP-9107
Mnesia 4.4.16
Fixed Bugs and Malfunctions
Sometimes a 'log_header' record was added to tables when invoking mnesia:restore/2 with the option 'recreate_tables'. Thanks Vance Shipley.
Own Id: OTP-8960
Improvements and New Features
Compiler warnings were eliminated.
Own Id: OTP-8855
Mnesia 4.4.15
Improvements and New Features
Eliminated warnings for auto-imported BIF clashes.
Own Id: OTP-8840
Mnesia 4.4.14
Improvements and New Features
Added mnesia:subscribe(activity) contributed by Bernard Duggan.
Own Id: OTP-8519
Mnesia 4.4.13
Fixed Bugs and Malfunctions
Transactions could be left hanging if a node went down when invoking mnesia:sync_transaction/[1,2]. Thanks Igor Ribeiro Sucupira.
Own Id: OTP-8402
Improvements and New Features
Igor Ribeiro Sucupira added the option to compress data when copying tables between Mnesia nodes.
Own Id: OTP-8406
Mnesia 4.4.12
Improvements and New Features
The documentation is now built with open source tools (xsltproc and fop) that exists on most platforms. One visible change is that the frames are removed.
Own Id: OTP-8250
Mnesia 4.4.11
Improvements and New Features
Fixed duplicate results with mnesia:index_read() on ordered_set tables. Reported by Sam Bobroff.
Fixed locking in mnesia:index_read() which now grabs a read table lock to ensure correctness, this may slow down the operation or block other processes trying to reach the same table.
Calling mnesia:dump_log() could crash mnesia, Reported by Igor Ribeiro Sucupira.
Own Id: OTP-8074
Mnesia 4.4.10
Fixed Bugs and Malfunctions
Mnesia crashed if a qlc query was running inside a transaction when mnesia stopped at another node. Thanks Teemu Antti-Poika.
Own Id: OTP-7968
Mnesia could crash when loading local_content tables.
Own Id: OTP-8002 Aux Id: seq11277
Improvements and New Features
Minor (smp) optimizations.
Own Id: OTP-7928
Mnesia 4.4.9
Fixed Bugs and Malfunctions
mnesia:clear_table/1 crashed instead of returning
{aborted,..}
if it was called inside a transaction.Own Id: OTP-7911
Mnesia 4.4.8
Fixed Bugs and Malfunctions
With bad timing several api functions could return or exit with a bad error message when mnesia was shutting down.
Own Id: OTP-7753 Aux Id: seq11179
mnesia:clear_table/1
cleared all nodes table content even if the table waslocal_content
only type.Own Id: OTP-7835
Mnesia 4.4.7
Fixed Bugs and Malfunctions
Disallowed match patterns ('_', and '$n') as argument to
mnesia:delete_object/1
and friends.Own Id: OTP-7524
Improvements and New Features
Introduced a few new functions in Mnesia:
mnesia:read/2
,mnesia:first/3
,mnesia:last/3
,mnesia:prev/4
,mnesia:next/4
,mnesia_frag:first/1
,mnesia_frag:last/1
,mnesia_frag:prev/2
,mnesia_frag:next/2
.Own Id: OTP-7625
Mnesia 4.4.6
Fixed Bugs and Malfunctions
mnesia:restore/2
aborted if aEXIT
message appeared in the client message queue.Own Id: OTP-7585 Aux Id: seq11046
Mnesia 4.4.5
Improvements and New Features
mnesia:clear_table/1 does not require that all replicas of the table are available anymore.
Own Id: OTP-7466 Aux Id: seq11015
Mnesia 4.4.4
Fixed Bugs and Malfunctions
Mnesia did not garbage collect transaction decisions on disk based nodes if no transactions where made on the local node.
Own Id: OTP-7419
Mnesia 4.4.3
Fixed Bugs and Malfunctions
Table referred to by foreign key did not have node_pool properly cleaned up when a node was removed from the schema. Thanks Paul Mineiro.
Own Id: OTP-7340
Mnesia crashed and generated a core dump if a schema_transaction was running when mnesia stopped.
Own Id: OTP-7378 Aux Id: seq10964
Improvements and New Features
It is now possible to delete a db node even when other disk resident nodes are down. Thanks Paul Mineiro.
Own Id: OTP-7383
Mnesia 4.4.2
Fixed Bugs and Malfunctions
Sticky locks could lead to hanging transactions.
Own Id: OTP-7205 Aux Id: seq10793
mnesia:snmp_get_next_index/2
didn't work with partial index keys. Argument checking is now done according to documentation, in functionsmnesia:snmp_get_row/2
,mnesia:snmp_get_mnesia_key/2
andmnesia:snmp_get_next_index/2
. These functions now require thatRowIndex
is a list.* POTENTIAL INCOMPATIBILITY *
Own Id: OTP-7208
Mnesia 4.4.1
Fixed Bugs and Malfunctions
Snmp index tables was not initialized correctly in
mnesia-4.4
.Own Id: OTP-7170 Aux Id: seq10870
Known Bugs and Problems
Rearranging fragmented tables is an O(N^2) operation.
Own Id: OTP-6300
Mnesia 4.4
Fixed Bugs and Malfunctions
Mnesia ignored the module argument to
mnesia:restore/2
. Thanks Paul Minerio.Own Id: OTP-6981
Improvements and New Features
Mnesia's snmp operations
snmp_get_row/2
,snmp_get_next_index/2
andsnmp_get_mnesia_key/2
have been made context aware, i.e. inside a transaction they will compensate for table updates made in earlier in the same transaction. This might cause a performance drop if a lot of updates have been made before the invocation of these functions.* POTENTIAL INCOMPATIBILITY *
Own Id: OTP-6856 Aux Id: seq10671
Introduced erlang:phash/2 as new default for fragmented tables. Already existing tables will continue to use whatever hash function they where using.
Own Id: OTP-6923
Introduced
mnesia:is_transaction/0
.Own Id: OTP-6995 Aux Id: seq10812
Known Bugs and Problems
Rearranging fragmented tables is an O(N^2) operation.
Own Id: OTP-6300