The assertion indicates that some data was left in the transaction
cache when the server was shut down, which means that a previous
statement did not commit or rollback correctly.
What happened was that a bug in the rollback of a transactional
table caused the transaction cache to be emptied, but not reset.
The error can be triggered by having a failing UPDATE or INSERT,
on a transactional table, causing an implicit rollback.
Fixed by always flushing the pending event to reset the state
properly.
manually resolved conflicts:
Text conflict in client/mysqltest.c
Contents conflict in mysql-test/include/have_bug25714.inc
Text conflict in mysql-test/include/have_ndbapi_examples.inc
Text conflict in mysql-test/mysql-test-run.pl
Text conflict in mysql-test/suite/parts/inc/partition_check_drop.inc
Text conflict in mysql-test/suite/parts/inc/partition_layout.inc
Text conflict in mysql-test/suite/parts/inc/partition_layout_check1.inc
Text conflict in mysql-test/suite/parts/inc/partition_layout_check2.inc
Text conflict in mysql-test/suite/parts/r/partition_alter1_1_2_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter1_1_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter1_2_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter2_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter3_innodb.result
Text conflict in mysql-test/suite/parts/r/partition_alter3_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_basic_innodb.result
Text conflict in mysql-test/suite/parts/r/partition_basic_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_basic_symlink_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_engine_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_syntax_myisam.result
Text conflict in mysql-test/suite/rpl_ndb/t/disabled.def
Text conflict in mysql-test/t/disabled.def
Problem 1: tests often fail in pushbuild with a timeout when waiting
for the slave to start/stop/receive error.
Fix 1: Updated the wait_for_slave_* macros in the following way:
- The timeout is increased by a factor ten
- Refactored the macros so that wait_for_slave_param does the work for
the other macros.
Problem 2: Tests are often incorrectly written, lacking a
source include/wait_for_slave_to_[start|stop].inc.
Fix 2: Improved the chance to get it right by adding
include/start_slave.inc and include/stop_slave.inc, and updated tests
to use these.
Problem 3: The the built-in test language command
wait_for_slave_to_stop is a misnomer (does not wait for the slave io
thread) and does not give as much debug info in case of failure as
the otherwise equivalent macro
source include/wait_for_slave_sql_to_stop.inc
Fix 3: Replaced all calls to the built-in command by a call to the
macro.
Problem 4: Some, but not all, of the wait_for_slave_* macros had an
implicit connection slave. This made some tests confusing to read,
and made it more difficult to use the macro in circular replication
scenarios, where the connection named master needs to wait.
Fix 4: Removed the implicit connection slave from all
wait_for_slave_* macros, and updated tests to use an explicit
connection slave where necessary.
Problem 5: The macros wait_slave_status.inc and wait_show_pattern.inc
were unused. Moreover, using them is difficult and error-prone.
Fix 5: remove these macros.
Problem 6: log_bin_trust_function_creators_basic failed when running
tests because it assumed @@global.log_bin_trust_function_creators=1,
and some tests modified this variable without resetting it to its
original value.
Fix 6: All tests that use this variable have been updated so that
they reset the value at end of test.
In order to handle CHAR() fields, 8 bits were reserved for
the size of the CHAR field. However, instead of denoting the
number of characters in the field, field_length was used which
denotes the number of bytes in the field.
Since UTF-8 fields can have three bytes per character (and
has been extended to have four bytes per character in 6.0),
an extra two bits have been encoded in the field metadata
work for fields of type Field_string (i.e., CHAR fields).
Since the metadata word is filled, the extra bits have been
encoded in the upper 4 bits of the real type (the most
significant byte of the metadata word) by computing the
bitwise xor of the extra two bits. Since the upper 4 bits
of the real type always is 1111 for Field_string, this
means that for fields of length <256, the encoding is
identical to the encoding used in pre-5.1.26 servers, but
for lengths of 256 or more, an unrecognized type is formed,
causing an old slave (that does not handle lengths of 256
or more) to stop.
without PK
Bug#31609 Not all RBR slave errors reported as errors
bug#32468 delete rows event on a table with foreign key constraint fails
The first two bugs comprise idempotency issues.
First, there was no error code reported under conditions of the bug
description although the slave sql thread halted.
Second, executions were different with and without presence of prim key in
the table.
Third, there was no way to instruct the slave whether to ignore an error
and skip to the following event or to halt.
Fourth, there are handler errors which might happen due to idempotent
applying of binlog but those were not listed among the "idempotent" error
list.
All the named issues are addressed.
Wrt to the 3rd, there is the new global system variable, changeble at run
time, which controls the slave sql thread behaviour.
The new variable allows further extensions to mimic the sql_mode
session/global variable.
To address the 4th, the new bug#32468 had to be fixed as it was staying
in the way.
