Tomcat error after pulling from master branch

[Pantelis Karamolegkos]

I just pushed to my dev server the latest changes from the master branch.

Tomcat seems to be producing the following error:

catalina.out:

Aug 31, 2016 3:21:32 PM org.apache.catalina.core.StandardContext startInternal

SEVERE: Error listenerStart

localhost.2016-08-31.log 

31-Aug-2016 15:21:25.408 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log No Spring WebApplicationInitializer types detected on classpath

31-Aug-2016 15:21:32.626 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.listenerStart Exception sending context initialized event to listener instance of class org.dspace.app.util.DSpaceWebappListener

 java.lang.NullPointerException

at org.dspace.core.AbstractHibernateDAO.getHibernateSession(AbstractHibernateDAO.java:48)

at org.dspace.core.AbstractHibernateDAO.create(AbstractHibernateDAO.java:38)

at org.dspace.app.util.WebAppServiceImpl.create(WebAppServiceImpl.java:49)

at org.dspace.app.util.AbstractDSpaceWebapp.register(AbstractDSpaceWebapp.java:75)

at org.dspace.app.util.DSpaceWebappListener.contextInitialized(DSpaceWebappListener.java:31)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)

at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5221)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

31-Aug-2016 15:21:32.627 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log Initializing Spring root WebApplicationContext

No errors in the dspace logs.

Any ideas?

Thanks,

P.K.

[Tim Donohue]

Hi P.K.,

I've not seen this issue on the latest master (pre-6.0) codebase.  What version of Tomcat and Java are you running?  Does Tomcat start up properly if you reboot it?

The area where you are seeing a NullPointerException seems to be implying the DB Connection may be null (or the Context). Here's the line of code: https://github.com/DSpace/DSpace/blob/master/dspace-api/src/main/java/org/dspace/core/AbstractHibernateDAO.java#L48

Currently, I've been developing/testing off the master codebase with no issues using Tomcat 7 and Java (OpenJDK) 8.  I'm aware that Tomcat 8.0.32 has a bug that affects the XMLUI (see DS-3142: https://jira.duraspace.org/browse/DS-3142). But we haven't seen any other issues similar to this one.

- Tim

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[Pantelis Karamolegkos]

Ηi Tim.

It turns out the problem most likely had to do with custom migrations which were (apparently) placed in the form of custom modules under:

org.dspace.storage.rdbms.sqlmigration.postgres

(along with ALL other existing migration scripts produced by the dspace community)

in under the local customizations project of dspace-api, i.e. under the folder [dspace-src]/dspace/modules/additions

The (specific) problem was remedied after completely removing all scripts from the particular location.
My migration scripts were transfered to [dspace-src]/etc/postgres/

Thanks!