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    This happens when you try to instantiate a class that can't be instantiated, either because the class object is abstract, an interface, an array class, a primitive type, void, or because the class has no nullary constructor.

Solutions on the web

via Terracotta by shutdown, 1 year ago
ConnectionProvider class 'org.quartz.utils.PoolingConnectionProvider' could not be instantiated. [See nested exception: java.lang.InstantiationException: org.quartz.utils.PoolingConnectionProvider]
via Terracotta by filihc, 9 months ago
ThreadPool class not specified.
via terracotta.org by Unknown author, 2 years ago
ThreadPool class not specified.
via Terracotta by viv2005, 9 months ago
Driver not specified for DataSource: myDS
via javaxp.com by Unknown author, 1 year ago
SchedulerPlugin class 'SimpleQuartzExample' could not be instantiated. [See nested exception: java.lang.ClassCastException: com.PlugInExample cannot be cast to org.quartz.spi.SchedulerPlugin]
via javaxp.com by Unknown author, 1 year ago
SchedulerPlugin class 'SimpleQuartzExample' could not be instantiated. [See nested exception: java.lang.ClassCastException: com.PlugInExample cannot be cast to org.quartz.spi.SchedulerPlugin]
java.lang.InstantiationException: org.quartz.utils.PoolingConnectionProvider	at java.lang.Class.newInstance0(Unknown Source)	at java.lang.Class.newInstance(Unknown Source)	at org.quartz.impl.StdSchedulerFactory.instantiate(StdSchedulerFactory.java:904)	at org.quartz.impl.StdSchedulerFactory.getScheduler(StdSchedulerFactory.java:1484)	at org.quartz.impl.StdSchedulerFactory.getDefaultScheduler(StdSchedulerFactory.java:1500)	at TestQuartz.main(TestQuartz.java:23)