session.clear() throws NullPointerException intermittently ---------------------------------------------------------- Key: HHH-3250 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3250 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.2.6 Environment: Hibernate 3.2.6ga, Oracle 10g, JRE 1.5 Reporter: Arturo Campos Receiving the following NullPointerException sometimes when calling session.clear() . java.lang.NullPointerException at org.hibernate.engine.StatefulPersistenceContext.clear(StatefulPersistenceContext.java:188) at org.hibernate.impl.SessionImpl.clear(SessionImpl.java:255) ... Our GUI application tries to reuse a session as shown in the simplified method below. This method may be called repeteadly from a clear/refresh button in a GUI screen. Data changes (DAO fields updated) to the session may or may not be made at discretion of the user. It is difficult to pinpoint the frequency as to when this happens. Sometimes the method may be called 10 times without incident. Try it at some other time and it may throw the exception after just couple of times. After the exception occurs the session becomes unusable and throws other exceptions if the user tries other operations such as save (update DB). // Note: session instanciated elsewhere (cacheMode = NORMAL) public void sessionReset() { m_session.getTransaction().rollback(); m_session.clear(); m_session.beginTransaction(); load(); // query to load/reload records } -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira