On 11/12/17 09:38, George News wrote:
Hi,
I'm facing the exception that I include below. I guess this is because I'm not
properly opening a transaction or so.
Let's try to explain a bit to guess if this is the problem:
- I have multiple graphs which I merge using MultiUnion
- I generate the MultiUnion in one transaction, but the use of the joined graph
is done in another transaction.
- I use a single static final Dataset from
TDBFactory.createDataset(TRIPLE_STORE_PATH);
- Read and write operations are done in different threads, so maybe we have
started a join for read and in parallel we are writing on one of the graphs
included in the union.
Any hint is welcome.
Regards,
Jorge
org.apache.jena.tdb.base.file.FileException: In the middle of an alloc-write
This could be related to JENA-1516. Part of that, for 3.5.0, is bad
testing of the alloc-write flag in read().
The only test case we have for this only occurs under quite high load
with more concurrent requests than real threads in the Fuseki server.
Andy
