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29.4. Deadlock Detection
A deadlock occurs when multiple processes or tasks wait for the other to release a mutually required resource. Deadlocks can significantly reduce the throughput of a system, particularly when multiple transactions operate against one key set.
Red Hat JBoss Data Grid provides deadlock detection to identify such deadlocks. Deadlock detection is enabled by default.
29.4.1. Enable Deadlock Detection
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Deadlock detection in Red Hat JBoss Data Grid is enabled by default, and may be configured by adjusting the
deadlock-detection-spin attribute of the cache configuration element, as seen below:
<local-cache [...] deadlock-detection-spin="1000"/>
<local-cache [...] deadlock-detection-spin="1000"/>
The
deadlock-detection-spin attribute defines how often lock acquisition is attempted within the maximum time allowed to acquire a particular lock (in milliseconds). This value defaults to 100 milliseconds, and negative values disable deadlock detection.
Deadlock detection can only be applied to individual caches. Deadlocks that are applied on more than one cache cannot be detected by JBoss Data Grid.
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