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https://issues.apache.org/jira/browse/JCR-2581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13004474#comment-13004474
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Petr Udalau commented on JCR-2581:
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The same problem:
http://dev.day.com/discussion-groups/content/lists/jackrabbit-users/2011-03/2011-03-02_NPE_on_checkin_when_using_transactions_Marlis_Lamp.html
> Get NPE when custom node was updated
> ------------------------------------
>
> Key: JCR-2581
> URL: https://issues.apache.org/jira/browse/JCR-2581
> Project: Jackrabbit Content Repository
> Issue Type: Bug
> Components: jackrabbit-core
> Affects Versions: 2.0.0
> Environment: Windows XP
> JDK 1.5.12
> JBoss 4.2.3
> Reporter: Stas
>
> I try to upgrade jackrabbit version in my project from 1.6 to 2.0. Some
> things from 2.0 are very usable. Thank you all for your job. But after
> transition on new version i get "magic" problems. I often catch NPE exception
> from inside jackrabbit api. After some investigations and tests i had found
> one of many problems.
> What i do in my test?
> I declare custom node type in cnd file. Then register it.
> [my:test] > nt:folder
> orderable
> - myp:html (string)
> = ''
> autocreated
> copy
> Call method create.
> private void testCreate(String name, String html, CredentialsTO credentials){
> Node docRootNode;
> Session session = null;
> try {
> session = getSession(credentials);
> docRootNode = session.getRootNode();
> Node testNode = docRootNode.addNode(name, "my:test");
> testNode.setProperty("myp:html", html);
> testNode.addMixin("mix:versionable");
> session.save();
>
> session.getWorkspace().getVersionManager().checkin(testNode.getPath());
> } catch (Exception e) {
> //do something
> } finally {
> logout(session);
> }
> }
> Then do update.
> private void testUpdate(String name, String html, CredentialsTO credentials){
> Session session = null;
> Node docRootNode;
> try {
> session = getSession(credentials);
> docRootNode = session.getRootNode();
> Node testNode = docRootNode.getNode(name);
>
> session.getWorkspace().getVersionManager().checkout(testNode.getPath());
> testNode.setProperty("myp:html", html);
> session.save();
>
> session.getWorkspace().getVersionManager().checkin(testNode.getPath());
> } catch (Exception e) {
> // do something
> } finally {
> logout(session);
> }
> }
> After last checkin in update method i always catch NullPointerException. I
> had connected src of jcr and jackrabbit and done some debug. This is method
> which throw exception in org.apache.jackrabbit.core.ItemManager.
> private boolean canRead(ItemData data, Path path) throws
> AccessDeniedException, RepositoryException {
> // JCR-1601: cached item may just have been invalidated
> ItemState state = data.getState();
> if (state == null) {
> throw new InvalidItemStateException(data.getId() + ": the item
> does not exist anymore");
> }
> if (state.getStatus() == ItemState.STATUS_NEW &&
> !data.getDefinition().isProtected()) { // THIS IS RIGHT
> PLACE data.getDefinition() = null
> // NEW items can always be read as long they have been added
> // through the API and NOT by the system (i.e. protected props).
> return true;
> } else {
> return (path == null) ?
> canRead(data.getId()) :
> session.getAccessManager().canRead(path);
> }
> }
> I don't understand when and why definition in NodeData can be null? This is
> my fault, wrong settings of repository or bug of jackrabbit?
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