to leave
The artifact was caused by
a flaw in concurrent accessing the slave's io thd by
the io itself and a handling show slave status thread.
Namely, show_master_info did not acquire mi->run_lock mutex that is
specified for mi->io_thd member.
Fixed with deploying the mutex locking and unlocking. The mutex is kept
short time and without interleaving with mi->data_lock mutex.
Todo: to report and fix an issue with
sys_var_slave_skip_counter::{methods}
seem to acquire incorrectly
active_mi->rli.run_lock
instead of the specified
active_mi->rli.data_lock
A test case is difficult to compose, so rpl_packet should continue serving
as the indicator.
sql/slave.cc:
implementing a TODO left at 4.1 time:
mending access to mi->io_thd with the specified mutex;
sql/slave.h:
adding a member name to the list of that run_lock guards.
into dl145h.mysql.com:/data0/mkindahl/mysql-5.0-rpl-merge
include/my_sys.h:
Auto merged
sql/log.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
into dl145h.mysql.com:/data0/mkindahl/mysql-5.0-rpl-merge
include/my_sys.h:
Auto merged
mysql-test/r/blackhole.result:
Auto merged
mysql-test/r/case.result:
Auto merged
mysql-test/r/mysqlbinlog2.result:
Auto merged
mysql-test/t/blackhole.test:
Auto merged
mysql-test/t/case.test:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
Here is the scenario that causes the failure.(by Mats)
1. The to-be corrupt log event (let's call it X), is split into two
packets B and C on the network level (net_write_buff()). The parts
are X = (x',x''). The part x' ends up in packet B and part x''
ends up in packet C. Prior to the corrupt event X, the event Y has
been written successfully, but has been split into two packets as
well, which we call (y',y'').
2. The master sends packet A = (y'',x') to the slave, increases the
packet sequence number, the slave receives the packet, but fails
to reply before the master gets a timeout.
3. Since the master got a timeout, it reports failure, and aborts
sending the binary log by exiting mysql_binlog_send(). However, it
leaves the buffer intact, still holding y'' (but not x', since the
write_pos is not increased).
4. After exiting mysql_binlog_send(), the master does a
disconnection of the client thread, which involves sending an
error message e to the client (i.e., the slave).
5. In this case, net_write_buff() is used again, but this time the
old contents of the packet is used so that the new packet is
D = (y'',e). Note that this will use a new packet sequence number,
since the packet number was increased in step 2.
6. The slave receives the tail y'' of the Y log event, concatenates
this with x' (which it already received), and writes the event
(x',y'') it to the relay log since it hasn't noticed anything is
amiss.
7. It then tries to read more bytes, which is either e (if the length
given for X just happened to match the length given for Y, or just
plain garbage because the slave is out of sync with what is
actually sent.
8. After a while, the SQL thread tries to execute the event (x',y''),
which is very likely to be just nonsense.
The problem can be fixed by not resetting net->error after the call of
mysql_binlog_send, so the error message will not be sent and the connection
will be closed.
sql/sql_parse.cc:
Do not reset net->error, if net->error == 2, we should not try to use the connection again
The problem is when create/rename/drop users, the statement was logged regardless of error, even if no data has been changed, the statement was logged.
After this patch, create/rename/drop users don't write the binlog if the statement makes no changes, if the statement does make any changes, log the statement with possible error code.
This patch is based on the patch for BUG#29749, which is not pushed
sql/sql_acl.cc:
when create/rename/drop users, don't write the binlog if the statement make no changes
mysql-test/r/rpl_user.result:
New BitKeeper file ``mysql-test/r/rpl_user.result''
mysql-test/t/rpl_user.test:
New BitKeeper file ``mysql-test/t/rpl_user.test''
into lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.0-33618
mysql-test/t/sp.test:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
Bug 33983 (Stored Procedures: wrong end <label> syntax is accepted)
The server used to crash when REPEAT or another control instruction
was used in conjunction with labels and a LEAVE instruction.
The crash was caused by a missing "pop" of handlers or cursors in the
code representing the stored program. When executing the code in a loop,
this missing "pop" would result in a stack overflow, corrupting memory.
Code generation has been fixed to produce the missing h_pop/c_pop
instructions.
Also, the logic checking that labels at the beginning and the end of a
statement are matched was incorrect, causing Bug 33983.
End labels, when used, must match the label used at the beginning of a block.
mysql-test/r/sp-code.result:
Bug#33618 (Crash in sp_rcontext)
mysql-test/r/sp-error.result:
Bug 33983 (Stored Procedures: wrong end <label> syntax is accepted)
mysql-test/r/sp.result:
Bug#33618 (Crash in sp_rcontext)
mysql-test/t/sp-code.test:
Bug#33618 (Crash in sp_rcontext)
mysql-test/t/sp-error.test:
Bug 33983 (Stored Procedures: wrong end <label> syntax is accepted)
mysql-test/t/sp.test:
Bug#33618 (Crash in sp_rcontext)
sql/sp_head.cc:
Bug#33618 (Crash in sp_rcontext)
sql/sp_head.h:
Bug#33618 (Crash in sp_rcontext)
sql/sp_rcontext.cc:
Bug#33618 (Crash in sp_rcontext)
sql/sp_rcontext.h:
Bug#33618 (Crash in sp_rcontext)
sql/sql_yacc.yy:
Bug#33618 (Crash in sp_rcontext)
The problem occurred when one had a subquery that had an equality X=Y where
Y referred to a named select list expression from the parent select. MySQL
crashed when trying to use the X=Y equality for ref-based access.
Fixed by allowing non-Item_field items in the described case.
mysql-test/r/subselect.result:
BUG#33794 "MySQL crashes executing specific query"
- Testcase
mysql-test/t/subselect.test:
BUG#33794 "MySQL crashes executing specific query"
- Testcase
sql/sql_select.cc:
BUG#33794 "MySQL crashes executing specific query"
get_store_key() assumed that if it got a reference
t.key=Item_outer_ref(Item_direct_ref(x))
then x was an Item_field object, which is not the case when one refers to a
named select list expression out ot subquery.
The ROUND(X, D) function would change the Item::decimals field during
execution to achieve the effect of a dynamic number of decimal digits.
This caused a series of bugs:
Bug #30617:Round() function not working under some circumstances in InnoDB
Bug #33402:ROUND with decimal and non-constant cannot round to 0 decimal places
Bug #30889:filesort and order by with float/numeric crashes server
Fixed by never changing the number of shown digits for DECIMAL when
used with a nonconstant number of decimal digits.
mysql-test/r/type_decimal.result:
Bug#33143: Test result
mysql-test/t/type_decimal.test:
Bug#33143: Test case
sql/item_func.cc:
Bug#33143:
- Moved the DECIMAL_MAX_SCALE limitation to fix_length_and_dec.
- Removed resetting of Item::decimals field.
- set the frac field of the output value to current scale.
strings/decimal.c:
Bug#33143: It is necessary to set all digits in the buffer following the
rounded one to zero, as they may now be displayed.
The name resolution for correlated subqueries and HAVING clauses
failed to distinguish which of two was being performed when there
was a reference to an outer aliased field.
Fixed by adding the condition that HAVING clause name resulotion
is being performed.
mysql-test/r/group_by.result:
Bug#31797: Test result
mysql-test/t/group_by.test:
Bug#31797: Test case
sql/item.cc:
Bug#31797:
Corrected function comment.
The fix, raising the error is restricted to HAVING name resolution.
value when inserting into a view.
The mysql_prepare_insert function checks all fields of the target table that
directly or indirectly (through a view) are specified in the INSERT
statement to have a default value. This check can be skipped if the INSERT
statement doesn't mention any insert fields. In case of a view this allows
fields that aren't mentioned in the view to bypass the check.
Now fields of the target table are always checked to have a default value
when insert goes into a view.
mysql-test/t/view.test:
Added a test case for the bug#29477: Not all fields of the target table were
checked to have a default value when inserting into a view.
mysql-test/r/view.result:
Added a test case for the bug#29477: Not all fields of the target table were
checked to have a default value when inserting into a view.
sql/sql_insert.cc:
Bug#29477: Not all fields of the target table were checked to have a default
value when inserting into a view.
Now fields of the target table are always checked to have a default value
when insert goes into a view.
Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
server crash.
Free smaller buffer before allocating bigger one.
sql/filesort.cc:
Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
server crash.
Free smaller buffer before allocating bigger one.
When resolving references we need to take into consideration
the view "fields" and allow qualified access to them.
Fixed by extending the reference resolution to process view
fields correctly.
mysql-test/r/func_group.result:
Bug #33133: test case
mysql-test/t/func_group.test:
Bug #33133: test case
sql/sql_base.cc:
Bug #33133: allow qualified alias refs to view fields
server crash.
The filesort implementation has an optimization for subquery execution which
consists of reusing previously allocated buffers. In particular the call to
the read_buffpek_from_file function might be skipped when a big enough buffer
for buffer descriptors (buffpeks) is already allocated. Beside allocating
memory for buffpeks this function fills allocated buffer with data read from
disk. Skipping it might led to using an arbitrary memory as fields' data and
finally to a crash.
Now the read_buffpek_from_file function is always called. It allocates
new buffer only when necessary, but always fill it with correct data.
sql/filesort.cc:
Bug#33675: Usage of an uninitialized memory by filesort in a subquery caused
server crash.Now the read_buffpek_from_file function is always called. It allocates
new buffer only when necessary, but always fill it with correct data.
mysql-test/r/subselect.result:
Added a test case for the bug#33675: Usage of an uninitialized memory by
filesort in a subquery caused server crash.
mysql-test/t/subselect.test:
Added a test case for the bug#33675: Usage of an uninitialized memory by
filesort in a subquery caused server crash.
into magare.gmz:/home/kgeorge/mysql/autopush/B33256-5.0-opt
sql/field.h:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/item_timefunc.h:
Auto merged
read_buffer_size set on master
BUG#33413 show binlog events fails if binlog has event size of close
to max_allowed_packet
The size of Append_block replication event was determined solely by
read_buffer_size whereas the rest of replication code deals with
max_allowed_packet.
When the former parameter was set to larger than the latter there were
two artifacts: the master could not read events from binlog;
show master events did not show.
Fixed with
- fragmenting the used io-cached buffer into pieces each size of less
than max_allowed_packet (bug#30435)
- incrementing show-binlog-events handling thread's max_allowed_packet
with the max estimated for the replication header size
include/my_sys.h:
accessor-macros added in order not to mess with the io cache's implementation
details in code that merely exploits the io-cache.
sql/sql_repl.cc:
BUG#33413: incrementing thd->variables.max_allowed_packet with
the max estimation for the replication header size (from bug#19402);
refactoring log_loaded_block() to fragment the io_cache buffer in case
read_buffer_size > max_allowed_packet.
mysql-test/r/rpl_loaddata_map.result:
New BitKeeper file ``mysql-test/r/rpl_loaddata_map.result''
mysql-test/t/rpl_loaddata_map-master.opt:
specific options to trigger BUG#30435, BUG#33413 situations
mysql-test/t/rpl_loaddata_map-slave.opt:
max_allowed_packet to be compatible with the master's version.
mysql-test/t/rpl_loaddata_map.test:
regression tests for two bugs.
Now, every transaction (including autocommit transactions) start with
a BEGIN and end with a COMMIT/ROLLBACK in the binlog.
Added a test case, and updated lots of test case result files.
mysql-test/t/rpl_transaction-master.opt:
BitKeeper file /home/sven/bk/b26395-autocommit-xa/5.0-rpl/mysql-test/t/rpl_transaction-master.opt
mysql-test/t/rpl_transaction-slave.opt:
BitKeeper file /home/sven/bk/b26395-autocommit-xa/5.0-rpl/mysql-test/t/rpl_transaction-slave.opt
mysql-test/r/mix_innodb_myisam_binlog.result:
Updated result file
mysql-test/r/multi_update.result:
Updated result file
mysql-test/r/rpl_transaction.result:
New result file for new test case.
mysql-test/r/sp_trans_log.result:
Updated result file
mysql-test/r/variables-big.result:
Updated result file
mysql-test/t/rpl_transaction.test:
New test case.
sql/log.cc:
- Always write BEGIN and COMMIT around statements, even in autocommit
mode.
- Added comments for binlog_commit and binlog_rollback.
sql/log_event.cc:
Added debug trigger to avoid writing xid events to the binlog.
w/ Field_date instead of Field_newdate
Field_date was still used in temp table creation.
Fixed by using Field_newdate consistently throughout the server
except when reading tables defined with older MySQL version.
No test suite is possible because both Field_date and Field_newdate
return the same values in all the metadata calls.
mysql-test/r/type_decimal.result:
Bug #33256: removed redundant warnings
sql/field.h:
Bug #33256: Add a constructor similar to Field_date::Field_date()
sql/item.cc:
Bug #33256: Use Field_newdate instead of Field_date
for all temp tables and CREATE .. SELECT
sql/item_sum.cc:
Bug #33256: Use Field_newdate instead of Field_date
for all temp tables and CREATE .. SELECT
sql/item_timefunc.cc:
Bug #33256: Use Field_newdate instead of Field_date
for all temp tables and CREATE .. SELECT
sql/item_timefunc.h:
Bug #33256: Use Field_newdate instead of Field_date
for all temp tables and CREATE .. SELECT
ignores future_group_master_log_p
There was a redundant assignement. However, that's the only artifact.
Wrt to future_group_master_log_position, there is no issue.
The counter is supposed to be set at Log_event::exec_event().
It's used only by Innodb for recovery purposes.
sql/sql_repl.cc:
removing a redundant line which arrived with the revision 1.102.1.7.
When set the server-id dynamically, the server_id member of current thread is not updated.
Update the server_id member of current thread after updated the global variable value.
sql/set_var.cc:
Update server_id of current thread
mysql-test/r/rpl_server_id.result:
Add test for BUG#28908
mysql-test/t/rpl_server_id.test:
Add test for BUG#28908
Complementary patch since LOAD DATA INFILE was not covered in
the previous patch.
This patch adds a check so that the slave skip counter is not
decreased to zero if seeing a BEGIN_LOAD_QUERY_EVENT,
APPEND_BLOCK_EVENT, or CREATE_FILE_EVENT since these cannot
end a group. The group is terminated by an EXECUTE_LOAD_QUERY_
EVENT or DELETE_FILE_EVENT.
mysql-test/r/rpl_slave_skip.result:
Result change.
mysql-test/t/rpl_slave_skip.test:
Adding tests to test that the first event of a LOAD DATA INFILE
can be skipped safely for both transactional and non-transactional
tables. Also include a case that will generate a DELETE_FILE event
last in the group, and this should be properly skipped as well.
sql/slave.cc:
Not decrementing slave skip counter to zero when seeing a
BEGIN_LOAD_QUERY_EVENT, APPEND_BLOCK_EVENT, or CREATE_FILE_EVENT
since these cannot end a group.
into mysql.com:/misc/mysql/31990/50-31990
mysql-test/r/cast.result:
Auto merged
mysql-test/r/type_date.result:
Auto merged
mysql-test/t/cast.test:
Auto merged
sql/field.cc:
Auto merged
sql/field.h:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/item_timefunc.h:
Auto merged
mysql-test/t/type_date.test:
manual merge
bug#33382
mysql-test/r/variables.result:
typo in a test case
mysql-test/t/variables.test:
typo in a test case
sql/set_var.cc:
correct invalid values in SET GLOBAL var=DEFAULT
into linux-st28.site:/home/martin/mysql/src/bug32848/my50-bug32848
sql/field.cc:
Auto merged
sql/field.h:
Auto merged
sql/item.cc:
Auto merged
sql/sql_select.cc:
Auto merged
mysql-test/r/union.result:
Bug#32848: Manual merge
mysql-test/t/union.test:
Bug#32848: Manual merge
