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164

Master database switching to read-only mode, possibly caused by slave failure

We had a database failure causing a production outage. Both master and slave databases have failed ... to read-only mode so this is also unexpected. Is it possible that actually the failure started ... takes too much resources, maybe because of repeating attempts?) As you know, master failure currently
149

ObjectDB stability after power failure

instantly available for many years. How stable is ObjectDB when it comes to power failures ... perform 'kick the plug out' demonstrations of how their product will survive power failures ... has two different mechanisms that should enable fully automatic recovery on power failure: Recovery File
143

Enhancer failure: Failed to process class file of type

)         ... 34 more FAILURE: Build failed with an exception. dmoshal David Moshal If you switched to Java
143

Optimistic locking failure

Optimistic locking failure: I am using a Semaphore to force this execution of concurrents transactions T1 and T2 that cause parallel updates to A/B but it does not throw an OptimisticLockException and roll back. T1 T2
136

failure to enforce NOT NULL for java.lang.String

failure to enforce NOT NULL for java.lang.String
136

Merge failure with composite primary key

Merge failure with composite primary key
136

JDOHelper.isDetached failure ?

JDOHelper.isDetached failure ?
136

Failure after ObjectDB 2.4.5_07 upgrade from 2.4.4_06

Failure after ObjectDB 2.4.5_07 upgrade from 2.4.4_06
32

Database Doctor

due to various reasons: Hardware failure (e.g. a physical disk failure). Software failure (e.g. a bug ... or I/O failure when copying, moving or transferring a database file. Transferring a database file ... without its recovery file or recording directory. Power failure when the database is being updated
24

JPA Exceptions

failures that require transaction rollback are represented by: The RollbackException exception usually wraps the real failure cause as a nested exception (which can be obtained by the getCause method ... causes for RollbackException are lock failures: Exceptions can also be thrown on an attempt

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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