Release Notes: Several deadlocks which occur under high-load with swapping were fixed. A lock monitor was added to provide feedback on lock usage and configuration variables for total number of locks and sample rate were added.
Release Notes: All dependencies on external concurrency libraries were removed and the codebase was ported onto java.util.concurrent. Version information was made available as a statistic alongside all others. JDK 1.4 support has been removed as part of the work on concurrency libraries, JDK 5 is now the minimum requirement.
Release Notes: A problem was fixed where a spurious wakeup could cause a take, a read, or a bulk take to exit early without matching, even if the timeout was Lease.FOREVER.
Release Notes: A VMStat-like tool (CondensedStats) was added. The information provided by the I/O and Thread statistics was extended. The LocalSpace implementation can now be started and stopped repeatedly within a single JVM instance. A new higher performance logger was added, making persistent mode up to fifty percent faster.
Release Notes: Several bugs in *IfExists were fixed. An IllegalMonitorStateException in FIFO notify mode was fixed. A bug in operations statistics was fixed and a threads statistic was added. The MonitorStats tool was modified to accept a loop-time in seconds. A tool to reload lookup settings from a configuration file was added.
Release Notes: The blocking operations core has been revised, leading to significant performance improvements. Various new statistics have been added. Several race conditions in the indexing code have been removed and the indexing core has been simplified, leading to improved performance. Support for running user code at boot time is now provided.