[hibernate-issues] [Hibernate-JIRA] Issue Comment Edited: (HHH-7101) NPE when trying to create EntityManagerFactory

[ https://hibernate.onjira.com/browse/HHH-7101?page=com.atlassian.jira.plug... ] Bryan Varner edited comment on HHH-7101 at 4/16/12 1:29 PM: ------------------------------------------------------------ I ran into this problem today, while testing an upgrade from 3.6.10.Final to 4.1.2.Final I've tracked down what I believe is the underlying issue, and would really appreciate if someone from the project would take a few minutes to verify.... In AnnotationBinder.java:1042, it creates / locates a CacheRegionFactory. The code being invoked in SettingsFactory is littered with "//todo remove" type comments. This block ends up returning an instance of NoCachingRegionFactory. This makes sense, since there is no 'hibernate.cache.region.factory_class' specified. The problem is, the code changed in... CacheConcurrencyStrategy.java:52. This used to be a null-safe series of if's, but has been changed to a switch(), which is now throwing NPE when invoked on the default value of 'null' returned by NoCachingRegionFactory.getDefaultAccessType() on line 59. I suppose the best (most correct) resolution is a null-check before the switch in CacheConcurrencyStrategy.java. In the mean-time, a workaround is to correctly configure your second-level cache, by adding... <property name="hibernate.cache.region.factory_class" value="_provider class name_"/> in your persistence.xml If you use ehcache, make sure you include hibernate-ehcache-4.1.2.Final.jar in your classpath, and use 'org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory' as your provider class name. The older provider name will try to load the old ehcache classes, and you'll get ClassNotFound exceptions. was (Author: bvarner): I ran into this problem today, while testing an upgrade from 3.6.10.Final to 4.1.2.Final I've tracked down what I believe is the underlying issue, and would really appreciate if someone from the project would take a few minutes to verify.... In AnnotationBinder.java:1042, it creates / locates a CacheRegionFactory. The code being invoked in SettingsFactory is littered with "//todo remove" type comments. This block ends up returning an instance of NoCachingRegionFactory. This makes sense, since there is no 'hibernate.cache.region.factory_class' specified. The problem is, the code changed in... CacheConcurrencyStrategy.java:52. This used to be a null-safe series of if's, but has been changed to a switch(), which is now throwing NPE when invoked on the default value of 'null' returned by NoCachingRegionFactory.getDefaultAccessType() on line 59. I suppose the best (most correct) resolution is a null-check before the switch in CacheConcurrencyStrategy.java. In the mean-time, a workaround is to correctly configure your second-level cache, by adding... <property name="hibernate.cache.region.factory_class" value="-provider class name-"/> in your persistence.xml If you use ehcache, make sure you include hibernate-ehcache-4.1.2.Final.jar in your classpath, and use 'org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory' as your provider class name. The older provider name will try to load the old ehcache classes, and you'll get ClassNotFound exceptions. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira