Created by Alexey Kopytov on 2013-04-01 and last modified on 2013-04-01
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535. By Alexey Kopytov on 2013-04-01

Bug #1162085: Percona server 5.5.30-rel30.1.465 reproducable hang

The fix for bug #1070856 that the underlying binlog cache file is always
larger then the offset passed to truncate_cached_file(). Which is not
always the case, because a part of the data which has already been
written may be in the IO_CACHE buffer, but not yet on disk.

What happened in the test case was that the server wrote ~48K data into
the binlog cache with 32K written to disk and the remaining part
residing in the IO_CACHE buffer. On the ROLLBACK TO statement the server
called truncate_cached_file() with the 48K offset, in which case
my_chsize() actually increased the underlying file by appending 16K worth
of zero bytes. When the remaining 16K bytes were eventually flushed to
disk on COMMIT, my_b_flush_io_cache() appended them again to the file,
resulting in the 64K total file size. This in turn led to
MYSQL_BIN_LOG::write_cache() hanging when reading bogus zero bytes due
to nonsensical zero offsets in the binlog cache.

Fixed truncate_cached_file() to only call my_chsize() when the
underlying cache file is larger than the passed offset.

534. By <email address hidden> on 2013-02-27

Merge lp:~laurynas-biveinis/percona-server/bug1117067-5.1

533. By <email address hidden> on 2013-02-27

Merge lp:~laurynas-biveinis/percona-server/bug1089265-5.1

532. By <email address hidden> on 2013-02-13

Merge lp:~laurynas-biveinis/percona-server/BT-16274-bug1108874-5.1

531. By <email address hidden> on 2013-02-13

Merge lp:~laurynas-biveinis/percona-server/BT-16274-bug1105726-5.1

530. By <email address hidden> on 2013-02-13

Merge lp:~hrvojem/percona-server/bug1092189-5.1

529. By Stewart Smith on 2013-02-11

merge slow query log bugfixes from Laurynas

528. By <email address hidden> on 2013-02-09

Merge lp:~laurynas-biveinis/percona-server/bug1114612-5.1

527. By <email address hidden> on 2013-02-08

Merge lp:~laurynas-biveinis/percona-server/BT-16274-bug1111226-5.1

526. By <email address hidden> on 2013-02-07

Merge lp:~laurynas-biveinis/percona-server/bug1105709-5.1

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