2015-08-25 09:31:35,055 WARN  org.apache.jackrabbit.core.SessionImpl            : Unclosed session detected. The session was opened here: 
java.lang.Exception: Stack Trace
	at org.apache.jackrabbit.core.SessionImpl.<init>(SessionImpl.java:222)
	at org.apache.jackrabbit.core.SessionImpl.<init>(SessionImpl.java:239)
	at org.apache.jackrabbit.core.XASessionImpl.<init>(XASessionImpl.java:101)
	at org.apache.jackrabbit.core.RepositoryImpl.createSessionInstance(RepositoryImpl.java:1613)
	at org.apache.jackrabbit.core.RepositoryImpl.createSession(RepositoryImpl.java:956)
	at org.apache.jackrabbit.core.RepositoryImpl.login(RepositoryImpl.java:1501)
	at org.apache.jackrabbit.core.jndi.BindableRepository.login(BindableRepository.java:162)
	at info.magnolia.jackrabbit.ProviderImpl.getSystemSession(ProviderImpl.java:527)
	at info.magnolia.repository.DefaultRepositoryManager.getSystemSession(DefaultRepositoryManager.java:259)
	at info.magnolia.context.SystemRepositoryStrategy.internalGetSession(SystemRepositoryStrategy.java:54)
	at info.magnolia.context.AbstractRepositoryStrategy.getSession(AbstractRepositoryStrategy.java:74)
	at info.magnolia.context.AbstractContext.getJCRSession(AbstractContext.java:132)
	at info.magnolia.context.MgnlContext.getJCRSession(MgnlContext.java:649)
	at info.magnolia.cms.security.JCRSessionOp.exec(JCRSessionOp.java:63)
	at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:385)
	at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:371)
	at info.magnolia.cms.security.MgnlUserManager.collectUniquePropertyNames(MgnlUserManager.java:648)
	at info.magnolia.cms.security.MgnlUserManager.collectUniquePropertyNames(MgnlUserManager.java:637)
	at info.magnolia.cms.security.MgnlUserManager.newUserInstance(MgnlUserManager.java:588)
	at info.magnolia.cms.security.MgnlUserManager$3.exec(MgnlUserManager.java:242)
	at info.magnolia.cms.security.MgnlUserManager$3.exec(MgnlUserManager.java:238)
	at info.magnolia.cms.security.JCRSessionOp.exec(JCRSessionOp.java:67)
	at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:385)
	at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:371)
	at info.magnolia.cms.security.MgnlUserManager.getUser(MgnlUserManager.java:238)
	at info.magnolia.cms.security.SystemUserManager.getOrCreateUser(SystemUserManager.java:191)
	at info.magnolia.cms.security.SystemUserManager.getSystemUser(SystemUserManager.java:131)
	at info.magnolia.cms.security.Security.getSystemUser(Security.java:80)
	at info.magnolia.context.AbstractContext.getUser(AbstractContext.java:72)
	at info.magnolia.context.SimpleContext.getUser(SimpleContext.java:105)
	at info.magnolia.ui.api.message.Message.<init>(Message.java:65)
	at info.magnolia.ui.api.message.Message.<init>(Message.java:74)
	at info.magnolia.module.scheduler.CommandJob.logAndSendErrorMessage(CommandJob.java:153)
	at info.magnolia.module.scheduler.CommandJob.execute(CommandJob.java:118)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:223)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)