IJ000453: Unable to get managed connection datasources
17:03:38,942 WARN [org.hibernate.engine.jdbc.internal.JdbcServicesImpl] (MSC service thread 1-2) HHH000342: Could not obtain connection to query metadata : javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/studentDS
I'm getting this error .... May I know .. what and why this occur and solution also
Hibernate is asking the DataSource you specified for a connection but the DataSource says it cannot return one. Beyond that, you have not given nearly enough information...