May 21, 2008
21 May 2008 - Apache Derby 10.3.3.0 released
The Apache Derby project is pleased to announce an important maintenance release of Derby, 10.3.3.0.
Apache Derby is a subproject of the Apache DB project. Derby is a pure Java relational database engine which conforms to the ISO/ANSI SQL and JDBC standards. Derby aims to be easy for developers and end-users to work with.
IMPORTANT NOTICE:
If you are currently using Derby 10.3.1.4 or Derby 10.3.2.1, it is strongly recommended that you upgrade to Derby 10.4.1.3 or 10.3.3.0 to avoid any chance of database corruption due to an issue with multiple threads accessing a database that is documented in DERBY-3347.
This bug can cause unrecoverable database corruption during periods of heavy, multi-thread I/O operations. The error produced in the test case used to diagnose the problem was:
ERROR XSDB3: Container information cannot change once written: was 0, now 80.
It is felt that other errors might also be generated when this type of corruption occurs. The corruption message will most likely refer to page 0 of the container. For example:
ERROR XSDG1: Page Page(0 ,Container(0, 5856)) could not be written...
This bug corrupts the pages on disk and can go unnoticed. If you do not run database consistency checks regularly it is recommended you begin doing so as soon as possible after the upgrade. To insure that corruption has not already occurred in existing databases, after upgrade run the database consistency check at least once to validate all tables in the database. This proalso check that the previous backup did not also have the corruption.
In some cases one may recover data from the existing database, depending on the extent of the corruption, but will require by hand data recovery. Depending on the type of corruption this may be successful or not. one should consult the Derby list if attempting this recovery - no automatic software solution to this recovery exists.
Version 10.3.3.0 can be downloaded from: http://db.apache.org/derby/releases/release-10.3.3.0.cgi
Version 10.4.1.3 can be downloaded from: http://db.apache.org/derby/releases/release-10.4.1.3.cgi
For help or questions: http://db.apache.org/derby/derby_mail.html
----
----Posted by Tetsuya Kitahata at May 21, 2008 02:03 AMProject Info -- Apache Derby
Apache Derby is an open source relational database implemented entirely in Java. It has a small footprint that makes it easy to embed in any Java-based application, but it also supports the more familiar client/server mode. It is based on the Java, JDBC, and SQL standards, making code developed more portable to standards-compliant databases.
Releases can be downloaded from http://db.apache.org/derby/derby_downloads.html
Project Website http://db.apache.org/derby Programming Languages Java Categories database Mailing Lists http://db.apache.org/derby/derby_mail.html Bug/Issue Tracker http://issues.apache.org/jira/browse/DERBY Project Management Committee Apache DB Access to the source code:
Browse http://svn.apache.org/repos/asf/db/derby/code/trunk/ SVN Direct http://svn.apache.org/repos/asf/db/derby/code/trunk/
http://www.apachenews.org/archives/001142.html
[ Category : Apache DB ] (PDF)(XML)
