[OAK-6410] NPE when removing inexistent property from checked in node

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.6.0
• Fix Version/s: 1.7.3, 1.6.3, 1.8.0
• Component/s: jcr
• Assignee: Marcel Reutegger
• Reporter: Ioan-Cristian Linte
• Created: 29/Jun/17 15:59
• Updated: 06/Jul/17 15:34
• Resolved: 03/Jul/17 09:48

Description

While running AEM 6.3 which uses oak 1.6.1 the following exception was seen in the logs:
Stacktrace:
java.lang.NullPointerException: null
at org.apache.jackrabbit.oak.jcr.session.NodeImpl$37.checkPreconditions(NodeImpl.java:1449)
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.prePerform(SessionDelegate.java:615)
at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.perform(SessionDelegate.java:205)
at org.apache.jackrabbit.oak.jcr.session.ItemImpl.perform(ItemImpl.java:112)
at org.apache.jackrabbit.oak.jcr.session.NodeImpl.internalRemoveProperty(NodeImpl.java:1444)
at org.apache.jackrabbit.oak.jcr.session.NodeImpl.setProperty(NodeImpl.java:354)
....... AEM Code

I have reproduced the NPE with the following code:

Node parent = session.getRootNode().addNode("parent", "nt:unstructured");
Node child = parent.addNode("child", "nt:unstructured");
child.addMixin("mix:versionable");
session.save();
session.getWorkspace().getVersionManager().checkin(child.getPath());
Node node = (Node) session.getItem("/parent/child");
node.setProperty("inexistent", (Value) null);