HTTP PUT deleting triples in sesame - apache

Question

I'm trying to use http PUT via cURL to update my triple store in openrdf-sesame, but I've hit a problem that I can't find a solution for.
When using POST, the triple data uploads perfectly.
But then using PUT, instead of adding the data provided, it deletes all the data from my repository. I've ran cURL in verbose mode, and it's giving back the expected HTTP status code.
I've added
<init-param>
<param-name>readonly</param-name>
<param-value>false</param-value>
</init-param>
to Apache Tomcat's web.xml,
Ive also tried the guide here: HTTP PUT Guide, but that hasn't helped either.
EDIT
Here are the cURL commands from my batch file:
call "%curl%" -# -X POST %endpoint%/statements -H "Content-Type:application/x-trig;charset=UTF-8" -d #%%X
call "%curl%" -# -X PUT %endpoint%/statements -H "Content-Type:application/x-trig;charset=UTF-8" -d #%%X
Which is essentially:
curl.exe -# -X POST http://myendpoint/statements -H "Content-Type:application/x-trig;charset=UTF-8" -d #MyTrigFile.trig
curl.exe -# -X PUT http://myendpoint/statements -H "Content-Type:application/x-trig;charset=UTF-8" -d #MyTrigFile.trig
For the moment, I've disabled authentication, but otherwise I'd also include a -u user:password argument.

Answer 1

I have just ran some tests using your exact way of invoking curl, and I can't reproduce the problem (using Sesame version 2.6.8): it works as expected here.
The only possible cause I can think of is that your TriG file has a syntax error which Sesame fails to report back.
Another possible problem is your expectations: the command as you execute it will completely clear the entire repository and replace the data with the contents of your TriG file. Were you perhaps expecting something else?
To further debug this, can you have a look in the Sesame server logs and tell us if it shows any warnings or errors? Server logs are viewable by going to http://<server:port>/openrdf-sesame/ in the browser and clicking 'System' in the menu on the left.