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When a timeline history file is fetched from server, it is initially created with a temporary file name, and renamed to place. However, the temporary file name was constructed using an uninitialized buffer. Usually that meant that the file was created in current directory instead of the target, which usually goes unnoticed, but if the target is on a different filesystem than the current dir, the rename() would fail. Fix that. The second issue is that pg_receivexlog would not take .partial files into account when determining when scanning the target directory for existing WAL files. If the timeline has switched in the server several times in the last WAL segment, and pg_receivexlog is restarted, it would choose a too old starting point. That's not a problem as long as the old WAL segment exists in the server and can be streamed over, but will cause a failure if it's not. Backpatch to 9.3, where this timeline handling code was written. Analysed by Andrew Gierth, bug #8453, based on a bug report on IRC. |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.