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http://issues.apache.org/jira/browse/JCR-551?page=comments#action_12431877 ]
Jaka Jaksic commented on JCR-551:
---------------------------------
Oh, it's actually like this:
String propertyValue = null;
node.setProperty("corruptionTest", propertyValue, PropertyType.STRING);
session.save();
You can insert this into any simple test case.
(Of course, I do not intentionally set the value to null in my code - I have a
parametrized function that sets some items' properties, which can also be null,
and I expected the property to be automatically erased in that case.)
> Null values cause BLOB corruption
> ---------------------------------
>
> Key: JCR-551
> URL: http://issues.apache.org/jira/browse/JCR-551
> Project: Jackrabbit
> Issue Type: Bug
> Components: core
> Affects Versions: 1.0.1
> Reporter: Jaka Jaksic
> Assigned To: Stefan Guggisberg
> Priority: Critical
>
> Using the file persistence manager (not sure about other managers) there is a
> way to produce a corrupt property BLOB, which can then be neither read nor
> modified nor deleted. Once this happens, Jackrabbit starts throwing "failed
> to read property state" exceptions every time it hits that property, and
> essentially becomes useless until the BLOB is fixed (e.g. with a hex editor).
> The problem is caused by passing a null value to a setProperty overload other
> than setProperty(String, Value).
> For example:
> node.setProperty("corruptionTest", null, PropertyType.STRING);
> This produces a corrupt BLOB (the data in the BLOB indicates value count = 1,
> then the BLOB ends) instead of removing the property or at least throwing an
> exception.
> setProperty(String, Value) properly removes the property if a null is passed
> to it, as documented in the JCR spec. I think other overloads should do the
> same, although this is not explicitly stated in the spec. In any case they
> should not corrupt repository data.
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