On 21/06/2022 02:24, Noah from ProvocaTeach wrote:
Hi all,
I took another look at the `journalctl` logs and noticed something in the stack
traces:
Jun 20 18:15:12 numberphile fuseki-server[8404]:
org.apache.jena.assembler.exceptions.AssemblerException: caught:
java.io.IOException: No such file or directory
Jun 20 18:15:12 numberphile fuseki-server[8404]: at
org.apache.jena.assembler.assemblers.AssemblerGroup$PlainAssemblerGroup.openBySpecificType(AssemblerGroup.java:165)
~[fuseki-server.jar:4.5.0]
Jun 20 18:15:12 numberphile fuseki-server[8404]: at
...
What’s happening in that `processServerConfiguration(FusekiConfig.java:192)` function? Is it looking for the config file and not locating it for some reason?
Yes.
(do you have any software that protects the filesystem? because
/srv/data-tier/database is not under the directory where Fuseki started)
Andy
I passed the argument `--config=/srv/data-tier/database/config.ttl` in the
`.service` file.
Best wishes,
Noah G.
On Mon, Jun 20, 2022, at 13:05, Noah from ProvocaTeach wrote:
Hi, thanks for the reply.
I could be mistaken, but I looked through the scripts, and I don’t think I’m
having Fuseki generate a PIDfile since I’m using `systemd`.
Here is my `fuseki.service` file:
[Unit]
Description=Apache Jena Fuseki
[Service]
Restart=on-abort
Type=simple
ExecStart=/srv/data-tier/fuseki/fuseki-server
--conf=/srv/data-tier/database/config.ttl --port=31457
User=fuseki
SupplementaryGroups=prte_database
Environment='FUSEKI_BASE=/srv/data-tier/database'
'FUSEKI_HOME=/srv/data-tier/fuseki' 'JVM_ARGS=-Xmx1500m'
[Install]
WantedBy=multi-user.target
The `fuseki` user owns `/srv/data-tier/database` and has read/write/execute
permissions on it.
According to the `systemd` docs
<https://www.freedesktop.org/software/systemd/man/systemd.service.html#PIDFile=>,
if I set `Type=simple` on a service, it shouldn’t be using PIDfiles.
Is that the problem? Should I have `Type` set to something else?
Best wishes,
Noah G.
On Mon, Jun 20, 2022, at 07:37, Sorin Gheorghiu wrote:
Hi,
could it be related to the file permissions for fuseki.pid? It defaults
first available of /var/run, /usr/var/run, and /tmp if not set.
Cheers,
Sorin
Am 20.06.2022 um 15:46 schrieb Noah from ProvocaTeach:
Hi all,
I am trying to run Fuseki as a `systemd` service. The service is up and
running, but every time I try to query the SPARQL endpoint from `localhost`, I
get a 503 Service Unavailable error.
$ curl -iX POST http://localhost:31457/reality/query --data "CONSTRUCT WHERE {?s ?p
?o}"
HTTP/1.1 503 Service Unavailable
Cache-Control: must-revalidate,no-cache,no-store
Content-Type: text/html;charset=iso-8859-1
Content-Length: 400
% an HTML error page
When I check the logs, I find a bunch of error messages:
Jun 20 04:42:15 numberphile systemd[1]: Started fuseki.service - Apache Jena
Fuseki.
Jun 20 04:42:25 numberphile fuseki-server[611]: 04:42:25 INFO Server
:: Apache Jena Fuseki 4.5.0
Jun 20 04:42:27 numberphile fuseki-server[611]: 04:42:27 INFO Config
:: FUSEKI_HOME=/srv/data-tier/fuseki
Jun 20 04:42:27 numberphile fuseki-server[611]: 04:42:27 INFO Config
:: FUSEKI_BASE=/srv/data-tier/database
Jun 20 04:42:27 numberphile fuseki-server[611]: 04:42:27 INFO Config
:: Shiro file: file:///srv/data-tier/database/shiro.ini
Jun 20 04:42:32 numberphile fuseki-server[611]: 04:42:32 ERROR Server
:: Exception in initialization: caught: java.io.IOException: No such file or
directory
Jun 20 04:42:32 numberphile fuseki-server[611]: 04:42:32 WARN WebAppContext
:: Failed startup of context o.e.j.w.WebAppContext@32f96bba{Apache Jena Fuseki
Server,/,file:///srv/data-tier/fuseki/webapp/,UNAVAILABLE}
Jun 20 04:42:32 numberphile fuseki-server[611]:
org.apache.jena.assembler.exceptions.AssemblerException: caught:
java.io.IOException: No such file or directory
% Many lines later…
Jun 20 04:42:32 numberphile fuseki-server[611]: Caused by:
org.apache.jena.atlas.RuntimeIOException: java.io.IOException: No such file or
directory
Jun 20 04:42:32 numberphile fuseki-server[611]: at
org.apache.jena.atlas.io.IO.exception(IO.java:336) ~[fuseki-server.jar:4.5.0]
Jun 20 04:42:32 numberphile fuseki-server[611]: at
org.apache.jena.tdb2.sys.DatabaseConnection.lockForLocation(DatabaseConnection.java:129)
~[fuseki-server.jar:4.5.0]
% Many lines later…
Jun 20 04:42:32 numberphile fuseki-server[611]: Caused by: java.io.IOException:
No such file or directory
Jun 20 04:42:32 numberphile fuseki-server[611]: at
java.io.UnixFileSystem.createFileExclusively(Native Method) ~[?:?]
Jun 20 04:42:32 numberphile fuseki-server[611]: at
java.io.File.createNewFile(File.java:1043) ~[?:?]
% Many lines later…
Jun 20 04:42:32 numberphile fuseki-server[611]: 04:42:32 INFO Server
:: Started 2022/06/20 04:42:32 PDT on port 31457
Any idea what might be causing these errors? I have not loaded anything into
the database yet. I am new to server administration, but I *think* I set all
the permissions correctly and edited the `fuseki.service` file appropriately…
Best wishes,
Noah G.
