Hi Philippe,
The issue is Windows.
There is a bug in the JDK on a NTFS filesystem whereby memory mapped
files are not deleted until the JVM exits. The JDK issue is "won't fix".
https://github.com/apache/jena/issues/2092#issuecomment-1810362743
WSL has linux filesystem semantics - no issue.
For you example below, you could PUT the new triples into the dtabase
which will clear out the old data.
Andy
On 20/06/2024 13:51, Philippe Genoud wrote:
I have an issue with Fuseki 5.0.0 running on Windows (10 or 11) when I
try to remove a existing dataset using the Web UI.
Here are the operations I'm performing
1) Create en new DataSet named Test1
2) Remove the DataSet
3) In the interface everything seems going fine, no message
But in fact the file (folder Test1 containing the dataset data) is not
destroyed on my hard disk and I get a Exception message on the console
saying that The process cannot access the file because this file is in
use by another process
Here the trace on the console
>fuseki-server.bat
14:24:31 INFO Server :: Apache Jena Fuseki 5.0.0
14:24:31 INFO Config ::
FUSEKI_HOME=P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\.
14:24:31 INFO Config ::
FUSEKI_BASE=P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\run
14:24:31 INFO Config :: Shiro file:
file://P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\run\shiro.ini
14:24:32 INFO Server :: Configuration file:
P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\run\config.ttl
14:24:32 INFO Server :: Memory: 1,2 GiB
14:24:32 INFO Server :: Java: 17.0.5
14:24:32 INFO Server :: OS: Windows 10 10.0 amd64
14:24:32 INFO Server :: PID: 22624
14:24:32 INFO Server :: Started 2024/06/20 14:24:32 CEST on
port 3030
14:25:14 INFO Admin :: [3] Create database : name = /test1
14:25:43 INFO Admin :: [5] DELETE dataset=/test1
14:25:43 ERROR Admin :: [5] Error while deleting database
files
P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\run\databases\test1:
java.nio.file.FileSystemException:
P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\run\databases\test1\Data-0001\GOSP.bpt: Le processus ne peut pas accéder au fichier car ce fichier est utilisé par un autre processus
org.apache.jena.atlas.RuntimeIOException:
java.nio.file.FileSystemException:
P:\DevTools\SemWeb\Fuseki\apache-jena-fuseki-5.0.0\run\databases\test1\Data-0001\GOSP.bpt: Le processus ne peut pas accéder au fichier car ce fichier est utilisé par un autre processus
at org.apache.jena.atlas.io.IOX.exception(IOX.java:55)
~[fuseki-server.jar:5.0.0]
at org.apache.jena.atlas.io.IO.deleteAll(IO.java:601)
~[fuseki-server.jar:5.0.0]
at
org.apache.jena.fuseki.mgt.ActionDatasets.execDeleteItem(ActionDatasets.java:422) ~[fuseki-server.jar:5.0.0]
at
org.apache.jena.fuseki.ctl.ActionContainerItem.performDelete(ActionContainerItem.java:99) ~[fuseki-server.jar:5.0.0]
at
org.apache.jena.fuseki.ctl.ActionContainerItem.execute(ActionContainerItem.java:45) ~[fuseki-server.jar:5.0.0]
at
org.apache.jena.fuseki.ctl.ActionCtl.executeLifecycle(ActionCtl.java:50)
~[fuseki-server.jar:5.0.0]
at
org.apache.jena.fuseki.ctl.ActionCtl.process(ActionCtl.java:40)
~[fuseki-server.jar:5.0.0]
at
org.apache.jena.fuseki.servlets.ActionExecLib.execActionSub(ActionExecLib.java:127) ~[fuseki-server.jar:5.0.0]
I've tried also with Java 21.0.3 (Oracle JDK) and I got the same
message. But when launching fuseki from wsl, everything works fine.
The problem is that if a create a Dataset, put some triples in it, then
if a remove it and I create a new dataset with the same name, all the
triples stored in the previous deleted one are in the new one.
Is it a known bug ? Is there a workaround ?
Thanks for your help
Philippe
--
Philippe Genoud
Universite Grenoble Alpes
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