Stardog run out of connection when using reasoning(true)

naru...@gmail.com

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Aug 21, 2015, 3:01:03 AM8/21/15

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Hi Stardog team,

Stardog version 3.0

We are using below method to create repository and obtain Connection.

aRepo = new StardogRepository(ConnectionConfiguration.to(dbname).credentials(username, password).reasoning(reasoning).server(dbLocation))

If reasoning(false), no issue encounter.

If reasoning(true), we encounter below exception when calling aRepo.getConnection()

com.complexible.stardog.StardogException: java.lang.NullPointerException

at com.complexible.stardog.protocols.http.client.BaseHttpClient.checkResponseCode(BaseHttpClient.java:370)

at com.complexible.stardog.protocols.http.client.BaseHttpClient.execute(BaseHttpClient.java:241)

at com.complexible.stardog.protocols.http.client.HttpClientImpl.connect(HttpClientImpl.java:211)

at com.complexible.stardog.protocols.http.client.HttpClientImpl.connect(HttpClientImpl.java:92)

at com.complexible.stardog.protocols.http.client.HttpConnection.create(HttpConnection.java:43)

at com.complexible.stardog.protocols.http.client.HttpDriver.connect(HttpDriver.java:85)

at com.complexible.stardog.api.DriverManager.getConnection(DriverManager.java:71)

at com.complexible.stardog.api.ConnectionConfiguration.connect(ConnectionConfiguration.java:136)

at com.complexible.stardog.api.ConnectionPoolableObjectFactory.makeObject(ConnectionPoolableObjectFactory.java:37)

at org.apache.commons.pool.impl.GenericObjectPool.addObject(GenericObjectPool.java:1691)

at org.apache.commons.pool.PoolUtils.prefill(PoolUtils.java:315)

at com.complexible.common.pool.ApachePoolImpl.<init>(ApachePoolImpl.java:36)

at com.complexible.stardog.api.ConnectionPoolConfig$ApacheConnectionPool.<init>(ConnectionPoolConfig.java:119)

at com.complexible.stardog.api.ConnectionPoolConfig.create(ConnectionPoolConfig.java:112)

at com.complexible.stardog.sesame.StardogRepository.<init>(StardogRepository.java:56)

It seems like a bug because by turning off reasoning, no issue encounter.

Thanks

Duc

Michael Grove

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Aug 21, 2015, 5:05:49 PM8/21/15

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Are there any stack traces in the server log?

Cheers,

Mike

It seems like a bug because by turning off reasoning, no issue encounter.

Thanks
Duc

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naru...@gmail.com

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Aug 23, 2015, 9:14:37 PM8/23/15

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Hi Mike,

Unfortunately there's no exception in server log. The log stop in the middle of sentence.

[WARNING com.clarkparsia.blackout.ALLFilter.visit - Aug 24, 2015 09:09:14.511] EquivalentClasses(telco:blanknode72812, or(om-10:Degree_Celsius_multipl

e_or_submultiple, om-10:Kelvin_multiple_or_submultiple, telco:blanknode72765)) is not a valid SL axiom.

[WARNING com.clarkparsia.blackout.ALLFilter.visit - Aug 24, 2015 09:09:14.511] EquivalentClasses(telco:blanknode36789, or(om-10

In client side, we could see below:

2015-08-24 09:09:12,291 [http-nio-8080-exec-7] INFO co.wds.xi.km2.web.EntityController- Searching list of entities for class: https://xi.xerox.com/1.0/domain/telco/Device