Re: NPE in BlobInputStream

On Sun, 26 Nov 2006, Kris Jurka wrote:

> On Fri, 24 Nov 2006, matrixx wrote:
>
>> im using the postgresql-8.1-407.jdbc3.jar driver over hibernate 3 to access
>> databases.
>>
>> Our application currently runs with mysql and mssql drivers without any
>> problems. With the postgresql driver i get the following exception:
>>
>> [ModuleProfile.deserialize@AWT-EventQueue-0] ERROR: Error deserializing
>> blob.
>> java.lang.NullPointerException
>>     at
>> org.postgresql.largeobject.BlobInputStream.close(BlobInputStream.java:115)
>>     at java.beans.XMLDecoder.close(XMLDecoder.java:152)
>>     ...
>>
>> I dont know if its a driver bug, or a hibernate issue.
>>
>
> It's a driver bug that's caused by one of two possible issues.  It's
> impossible to tell which from this stacktrace alone.
>
> 1) The BlobInputStream is violating the contract of the close method that
> allows you to call it more than once.
>
> 2) You've called getInputStream more than once on a Blob and it can't handle
> two streams simultaneously.
>

I've applied a more complete fix for these issues to CVS HEAD.

Kris Jurka