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Re: [rdf4j-dev] NativeStore initialization with strange error in log
  • From: "Bart Hanssens (BOSA)" <bart.hanssens@xxxxxxxxxxxx>
  • Date: Mon, 30 Sep 2019 20:18:30 +0000
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  • Thread-topic: [rdf4j-dev] NativeStore initialization with strange error in log

Hi,

 

Hmz, I think this could be a regression or side-effect of  #1453 (native store context cache)

https://github.com/eclipse/rdf4j-storage/pull/253

 

Best regards

 

Bart

 

From: rdf4j-dev-bounces@xxxxxxxxxxx <rdf4j-dev-bounces@xxxxxxxxxxx> On Behalf Of Andreas Schwarte
Sent: maandag 30 september 2019 22:11
To: rdf4j developer discussions <rdf4j-dev@xxxxxxxxxxx>
Subject: [rdf4j-dev] NativeStore initialization with strange error in log

 

Hi,

 

while doing some developments on the federation module I stumbled into a strange exception trace in my log.

 

The error does not actually seem to be an error (the application continues fine), however, there is a full stack trace in the log on level INFO.

 

Example code:

 

@Test
public void demo() throws Exception {

File dataDir = tempDir.toFile();
NativeStore ns = new NativeStore(new File(dataDir, "endpoint"));

SailRepository repo = new SailRepository(ns);
repo.init();

// can do anything here

repo.shutDown();

}

 

 

 

Log output:

 

[main] INFO org.eclipse.rdf4j.sail.nativerdf.ContextStore - could not read context index: context index file /var/folders/ns/h23528px44q6yqvz45cbcfmc0000gn/T/junit8710876636775043883/endpoint/contexts.dat does not exist
java.io.IOException: context index file /var/folders/ns/h23528px44q6yqvz45cbcfmc0000gn/T/junit8710876636775043883/endpoint/contexts.dat does not exist
at org.eclipse.rdf4j.sail.nativerdf.ContextStore.readContextsFromFile(ContextStore.java:183)
at org.eclipse.rdf4j.sail.nativerdf.ContextStore.<init>(ContextStore.java:102)
at org.eclipse.rdf4j.sail.nativerdf.NativeSailStore.<init>(NativeSailStore.java:95)
at org.eclipse.rdf4j.sail.nativerdf.NativeStore.initializeInternal(NativeStore.java:264)
at org.eclipse.rdf4j.sail.helpers.AbstractSail.init(AbstractSail.java:187)
at org.eclipse.rdf4j.repository.sail.SailRepository.initializeInternal(SailRepository.java:146)
at org.eclipse.rdf4j.repository.base.AbstractRepository.init(AbstractRepository.java:39)

 

 

After this error is printed, the initialization routine re-creates the context index, and the NativeStore can be used, see org.eclipse.rdf4j.sail.nativerdf.ContextStore.initializeContextCache(). Note particularly that I successfully reach the end of the test method.

 

Am I overseeing something or maybe doing something wrong? To me this really looks suspicious.

 

Thanks,

 Andreas

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