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wsrep_provider on non-Galera build
Fix error message to contain correct errno. This commit was
tested interactively because mtr will notice if you provide
wrong wsrep_provider in config and you may not change
wsrep_provider dynamically.
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thd)' failed in void my_malloc_size_cb_func(long long int, my_bool)
If wsrep slave thread creation fails for some reason we need to handle
this error correctly and set actual running slave threads accordingly.
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Making changes to wsrep_mysqld.h causes large parts of server code to
be recompiled. The reason is that wsrep_mysqld.h is included by
sql_class.h, even tough very little of wsrep_mysqld.h is needed in
sql_class.h. This commit introduces a new header file, wsrep_on.h,
which is meant to be included from sql_class.h, and contains only
macros and variable declarations used to determine whether wsrep is
enabled.
Also, header wsrep.h should only contain definitions that are also
used outside of sql/. Therefore, move WSREP_TO_ISOLATION* and
WSREP_SYNC_WAIT macros to wsrep_mysqld.h.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
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This adds following new thread states:
* waiting to execute in isolation - DDL is waiting to execute in TOI mode.
* waiting for TOI DDL - some other statement is waiting for DDL to complete.
* waiting for flow control - some statement is paused while flow control is in effect.
* waiting for certification - the transaction is being certified.
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In a rebase of the merge, two preceding commits were accidentally reverted:
commit 112b23969a30ba6441efa5e22a3017435febfa17 (MDEV-26308)
commit ac2857a5fbf851d90171ac55f23385869ee6ba83 (MDEV-25717)
Thanks to Daniele Sciascia for noticing this.
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Contains following fixes:
* allow TOI commands to timeout while trying to acquire TOI with
override lock_wait_timeout with a LONG_TIMEOUT only after
succesfully entering TOI
* only ignore lock_wait_timeout on TOI
* fix galera_split_brain test as TOI operation now returns ER_LOCK_WAIT_TIMEOUT after lock_wait_timeout
* explicitly test for TOI
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
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Changes to be committed:
modified: mysql-test/include/galera_variables_ok.inc
modified: mysql-test/include/galera_variables_ok_debug.inc
modified: mysql-test/suite/galera/r/galera_defaults.result
deleted: mysql-test/suite/galera/r/galera_var_wsrep_strict_ddl.result
modified: mysql-test/suite/galera/t/galera_defaults.test
deleted: mysql-test/suite/galera/t/galera_var_wsrep_strict_ddl.test
modified: mysql-test/suite/sys_vars/r/sysvars_wsrep.result
modified: mysql-test/suite/wsrep/r/variables.result
modified: mysql-test/suite/wsrep/r/variables_debug.result
modified: sql/sys_vars.cc
modified: sql/wsrep_mysqld.cc
modified: sql/wsrep_mysqld.h
modified: sql/wsrep_var.cc
modified: sql/wsrep_var.h
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* Disallow setting wsrep_on = 1 if wsrep_provider is unset. Also, move
wsrep_on_basic from sys_vars to wsrep suite: this test now requires
to run with wsrep_provider set
* Disallow setting @@session.wsrep_on = 1 when @@global.wsrep_on = 0
* Handle the case where a new connection turns @@global.wsrep_on from
off to on. In this case we would miss a call to wsrep_open, causing
unexpected states in wsrep::client_state (causing assertions).
* Disable wsrep.MDEV-22443 because it is no longer possible to enable
wsrep_on, if server is started with wsrep_provider='none'
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
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This patch makes the following changes around variable wsrep_on:
1) Variable wsrep_on can no longer be updated from a session that has
an active transaction running. The original behavior allowed cases
like this:
BEGIN;
INSERT INTO t1 VALUES (1);
SET SESSION wsrep_on = OFF;
INSERT INTO t1 VALUES (2);
COMMIT;
With regular transactions this would result in no replication
events (not even value 1). With streaming replication it would be
unnecessarily complex to achieve the same behavior. In the above
example, it would be possible for value 1 to be already replicated if
it happened to fill a separate fragment, while value 2 wouldn't.
2) Global variable wsrep_on no longer affects current sessions, only
subsequent ones. This is to avoid a similar case to the above, just
using just by using global wsrep_on instead session wsrep_on:
--connection conn_1
BEGIN;
INSERT INTO t1 VALUES(1);
--connection conn_2
SET GLOBAL wsrep_on = OFF;
--connection conn_1
INSERT INTO t1 VALUES(2);
COMMIT;
The above example results in the transaction to be replicated, as
global wsrep_on will only affect the session wsrep_on of new
connections.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
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Added a new wsrep_mode feature DISALLOW_LOCAL_GTID for this.
Nodes can have GTIDs for local transactions in the following scenarios:
A DDL statement is executed with wsrep_OSU_method=RSU set.
A DML statement writes to a non-InnoDB table.
A DML statement writes to an InnoDB table with wsrep_on=OFF set.
If user has set wsrep_mode=DISALLOW_LOCAL_GTID these operations
produce a error ERROR HY000: Galera replication not supported
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Introduced two new wsrep_mode options
* REPLICATE_MYISAM
* REPLICATE_ARIA
Depracated wsrep_replicate_myisam parameter and we use
wsrep_mode = REPLICATE_MYISAM instead.
This required small refactoring of wsrep_check_mode_after_open_table
so that both MyISAM and Aria are handled on required DML cases.
Similarly, added Aria to wsrep_should_replicate_ddl to handle DDL
for Aria tables using TOI. Added test cases and improved MyISAM testing.
Changed use of wsrep_replicate_myisam to wsrep_mode = REPLICATE_MYISAM
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Null pointer reference to wsrep_provider_options variable. Fixed
by adding condition and error handling.
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wsrep_cluster_address_update() causes LOCK_wsrep_slave_threads
to be locked under LOCK_wsrep_cluster_config, while normally
the order should be the opposite.
Fix: don't protect @@wsrep_cluster_address value with the
LOCK_wsrep_cluster_config, LOCK_global_system_variables is enough.
Only protect wsrep reinitialization with the LOCK_wsrep_cluster_config.
And make it use a local copy of the global @@wsrep_cluster_address.
Also, introduce a helper function that checks whether
wsrep_cluster_address is set and also asserts that it can be safely
read by the caller.
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rarely (try --repeat 1000), the following happens:
* from wsrep_bf_abort (when a thread is being killed), wsrep-lib
starts streaming_rollback that wants to
convert_streaming_client_to_applier. wsrep_create_streaming_applier
creates a new THD(). All while the other THD is being killed,
so under LOCK_thd_kill and LOCK_thd_data. In particular, THD::init()
takes LOCK_global_system_variables under LOCK_thd_kill.
* updating @@wsrep_slave_threads takes LOCK_global_system_variables
and LOCK_wsrep_cluster_config (in that order) and invokes
wsrep_slave_threads_update() that takes LOCK_wsrep_slave_threads
* wsrep_replication_process() takes LOCK_wsrep_slave_threads and
invokes wsrep_close_applier(), that does thd->set_killed() which
takes LOCK_thd_kill.
et voilà.
As a fix I copied a workaround from wsrep_cluster_address_update()
to wsrep_slave_threads_update(). It seems to be safe: without mutexes
a race condition is possible and a concurrent SET might change
wsrep_slave_threads, but wsrep_slave_threads_update() always verifies
if there's a need to do something, so it will not run twice in this case,
it'll be a no-op.
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Added new enum variable `wsrep_mode` which can be used to turn on WSREP
features which are not part of default behaviour.
Added enum `BINLOG_ROW_FORMAT_ONLY`, `REQUIRED_PRIMARY_KEY` and
`STRICT_REPLICATION`. `wsrep-mode=STRICT_REPLICATION` behaves
like variable `wsrep_strict_ddl`.
Variable wsrep_strict_ddl is deprecated and if set we use
new wsrep_mode setting instead.
Reviewed and improved by: Jan Lindström <jan.lindstrom@mariadb.com>
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failed: 1213: Deadlock found when trying to get lock
We need to complete SST if both new and old start positions are
not same as initial positions. If they are initial positions
just set local uuid and seqno.
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wsrep::client_state::disable_streaming
There were multiple problems here
* wsrep_trx_fragment_size should not be set when wsrep is disabled or provider is not loaded
* wsrep_trx_fragment_unit should not be set when wsrep is disabled or provider is not loaded
* wsrep_debug has no effect if wsrep is disabled or provider is not loaded
* wsrep_start_position should not be set when wsrep is disabled or provider is not loaded any other value than default
* wsrep_start_position should be changed only when we are joiner or initialized
* wsrep_start_position should be allowed to set only a value that exits, thus
we need to add error handling to wsrep_sst_complete
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trx_rseg_update_wsrep_checkpoint on SET @@global.wsrep_start_position
Actual assertion mentioned on MDEV seems to be already fixed but
setting seqno to -2 will trigger a different assertion
mysqld: /home/jan/mysql/10.4-bugs/wsrep-lib/src/server_state.cpp:702: void wsrep::server_state::sst_received(wsrep::client_service&, int): Assertion `state_ == s_joiner || state_ == s_initialized' failed.
Fixed this by not allowing user to set seqno < -1 (-1 is special
seqno meaning undefined and seqno is initialized to it). MariaDB
releases 10.2 and 10.3 already do not allow to set seqno < -1.
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Sys_var_integer from __static_initialization_and_destruction_0, possibly inside global var wsrep_gtid_server
Galera parameter wsrep_gtid_domain_id was defined using a class where
actual parameter was not a first member. Fixed this by using normal
variable and assigning this value to class member value.
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st_mysql_show_var*, char*) through pointer to incorrect function type 'int (*)(THD *, st_mysql_show_var *, void *, system_status_var *, enum_var_type) errors
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