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MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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13ce2d7778
table cache is full After reading last record from freshly opened archive table (e.g. after flush table, or if there is no room in table cache), the table is reported as crashed. The problem was that azio wrongly invalidated azio_stream when it meets EOF. mysql-test/r/archive.result: A test case for BUG#31833. mysql-test/t/archive.test: A test case for BUG#31833. storage/archive/azio.c: After azread() successfuly read and inflated data, it calls check_header() function. According to the comment it is done to detect concatenated .az files. When we read last record, there are no more bytes left at the current offset, all further my_read() calls will return 0. In this case check_header() wrongly sets s->z_err to Z_ERRNO, indicating that azio_stream is broken. Following is original condition from gzio: len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file); if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO; As fread() returns 0 on both EOF and error, the condition states: Invalidate gzio_stream if we got an error from last fread(). Applied the same logic to azio. Note that a test case contains FLUSH TABLE t1 prior to SELECT. It is needed because azio doesn't flush buffers immediately. Thus we may azread() last record from in-memory buffer. When we read from in-memory buffer, EOF is detected by different branch of code in azread() and we never enter check_header() in this case. |
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This is a release of MySQL, a dual-license SQL database server. MySQL is brought to you by the MySQL team at MySQL AB. License information can be found in these files: - For GPL (free) distributions, see the COPYING file and the EXCEPTIONS-CLIENT file. - For commercial distributions, see the LICENSE.mysql file. For further information about MySQL or additional documentation, see: - The latest information about MySQL: http://www.mysql.com - The current MySQL documentation: http://dev.mysql.com/doc Some manual sections of special interest: - If you are migrating from an older version of MySQL, please read the "Upgrading from..." section first! - To see what MySQL can do, take a look at the features section. - For installation instructions, see the Installing and Upgrading chapter. - For the new features/bugfix history, see the Change History appendix. - For the currently known bugs/misfeatures (known errors) see the Problems and Common Errors appendix. - For a list of developers and other contributors, see the Credits appendix. A local copy of the MySQL Reference Manual can be found in the Docs directory in GNU Info format. You can also browse the manual online or download it in any of several formats at the URL given earlier in this file. ************************************************************ IMPORTANT: Bug or error reports should be sent to http://bugs.mysql.com.