Version 0.4.2

• Improved the way that the storage engine processes find queries, resulting in a further speed improvement of over 35 percent.
• Fixed a bug with real-time transaction failure detection that made it possible for phantom reads to occur.
• Fixed an issue that caused Concourse Server to drop transaction tokens when under increased concurrency.
• Fixed a bug in the just-in-time locking protocol that prematurely removed references to active locks.
• Fixed a bug where transactions that started to commit but failed before completing did not release locks, resulting in deadlocks.
• Fixed an issue where transactions unnecessarily grabbed locks twice while committing.
• Fixed an issues that made it possible for deadlocks to occur with many concurrent Transactions performing atomic operations (i.e. set).
• Improved the javadoc for the Tag datatype.
• Fixed a bug where the Tag#toString method threw a NullPointerException if the Tag was created using a null value.
• Add a min method to the Numbers utility class.
• Fixed a bug that caused the insert methods to incorrectly store values encoded as resolvable link specifications as strings instead of links to resolved records.
• Added a heap_size preference in concourse.prefs that configures the initial and max heap for the Concourse Server JVM.