| 2017-01-20 11:10:11 |
Laurynas Biveinis |
bug |
|
|
added bug |
| 2017-01-20 11:10:32 |
Laurynas Biveinis |
nominated for series |
|
percona-server/5.5 |
|
| 2017-01-20 11:10:32 |
Laurynas Biveinis |
bug task added |
|
percona-server/5.5 |
|
| 2017-01-20 11:10:32 |
Laurynas Biveinis |
nominated for series |
|
percona-server/5.7 |
|
| 2017-01-20 11:10:32 |
Laurynas Biveinis |
bug task added |
|
percona-server/5.7 |
|
| 2017-01-20 11:10:32 |
Laurynas Biveinis |
nominated for series |
|
percona-server/5.6 |
|
| 2017-01-20 11:10:32 |
Laurynas Biveinis |
bug task added |
|
percona-server/5.6 |
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| 2017-01-20 11:10:38 |
Laurynas Biveinis |
percona-server/5.5: assignee |
|
Laurynas Biveinis (laurynas-biveinis) |
|
| 2017-01-20 11:10:40 |
Laurynas Biveinis |
percona-server/5.6: assignee |
|
Laurynas Biveinis (laurynas-biveinis) |
|
| 2017-01-20 11:10:41 |
Laurynas Biveinis |
percona-server/5.7: assignee |
|
Laurynas Biveinis (laurynas-biveinis) |
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| 2017-01-20 11:10:43 |
Laurynas Biveinis |
percona-server/5.5: importance |
Undecided |
High |
|
| 2017-01-20 11:10:45 |
Laurynas Biveinis |
percona-server/5.6: importance |
Undecided |
High |
|
| 2017-01-20 11:10:46 |
Laurynas Biveinis |
percona-server/5.7: importance |
Undecided |
High |
|
| 2017-01-20 11:10:49 |
Laurynas Biveinis |
percona-server/5.5: status |
New |
In Progress |
|
| 2017-01-20 11:10:51 |
Laurynas Biveinis |
percona-server/5.6: status |
New |
Triaged |
|
| 2017-01-20 11:10:53 |
Laurynas Biveinis |
percona-server/5.7: status |
New |
Triaged |
|
| 2017-01-20 11:11:05 |
Laurynas Biveinis |
tags |
|
bitmap xtradb |
|
| 2017-01-23 08:33:10 |
Laurynas Biveinis |
description |
On server startup, log tracking tries to find the last good bitmap data, discard any later junk, and re-track its log. The intention of the algorithm is to open the last bitmap file, read the last page, check its checksum and last-page flag, and if either check fails, discard it, and seek back in the file.
However, the read loop condition currently is "while (!checksum_ok && read_offset > 0 && !is_last_page)", that is, only read back if both the checksum is wrong and the last page flag is set. This is invalid logic, it should either-or condition.
This results in log initializer stopping too early in the backward search, re-reading too little log, and creating a hole in the available bitmap data after crash recovery, breaking fast backups. |
On server startup, log tracking tries to find the last good bitmap data, discard any later junk, and re-track its log. The intention of the algorithm is to open the last bitmap file, read the last page, check its checksum and last-page flag, and if either check fails, discard it, and seek back in the file.
However, the read loop condition currently is "while (!checksum_ok && read_offset > 0 && !is_last_page)", that is, only read back if both the checksum is wrong and the last page flag is set. This is invalid logic, it should either-or condition.
This results in log initializer stopping too early in the backward search, discarding the whole of the last bitmap file, and either regenerating its data if possible to re-read log, or needlessly creating a hole in bitmap-covered LSN range otherwise. |
|
| 2017-01-23 08:44:43 |
Laurynas Biveinis |
percona-server/5.5: status |
In Progress |
Fix Committed |
|
| 2017-01-23 08:44:45 |
Laurynas Biveinis |
percona-server/5.6: status |
Triaged |
In Progress |
|
| 2017-01-23 11:20:08 |
Laurynas Biveinis |
percona-server/5.6: status |
In Progress |
Fix Committed |
|
| 2017-01-23 11:20:10 |
Laurynas Biveinis |
percona-server/5.7: status |
Triaged |
Fix Committed |
|
| 2017-02-24 13:37:23 |
Laurynas Biveinis |
percona-server/5.5: milestone |
|
5.5.54-38.7 |
|
| 2017-02-24 13:37:24 |
Laurynas Biveinis |
percona-server/5.6: milestone |
|
5.6.36-80.1 |
|
| 2017-02-24 13:37:26 |
Laurynas Biveinis |
percona-server/5.7: milestone |
|
5.7.18-12 |
|
| 2017-02-24 13:37:31 |
Laurynas Biveinis |
percona-server/5.7: status |
Fix Committed |
Fix Released |
|
| 2017-02-24 13:37:35 |
Laurynas Biveinis |
percona-server/5.5: status |
Fix Committed |
Fix Released |
|
| 2017-02-24 13:37:38 |
Laurynas Biveinis |
percona-server/5.6: status |
Fix Committed |
Fix Released |
|
| 2017-03-21 03:20:06 |
Laurynas Biveinis |
summary |
Log tracking initialisation does not find the last good bitmap data correctly |
Log tracking initialisation does not find last valid bitmap data correctly |
|
