'Export as' has bug

[s.ar...@geophy.com]

Hi all, I run a query and try to export it as RDF/XML. 

I got this error.

ERROR 2016-11-09 15:25:06,498 [StardogServer.WorkerGroup-1] com.complexible.stardog.protocols.http.server.HttpMessageEncoder:write(161): There was an error while encoding the response

java.lang.NullPointerException

at com.complexible.stardog.protocols.http.server.io.ResponseBodyEncoders$12.encode(ResponseBodyEncoders.java:418) ~[stardog-protocols-http-server-4.2.jar:?]

at com.complexible.stardog.protocols.http.server.io.ResponseBodyEncoders$2.encode(ResponseBodyEncoders.java:104) ~[stardog-protocols-http-server-4.2.jar:?]

at com.complexible.stardog.protocols.http.annex.QueryPanelEncoder.encode(QueryPanelEncoder.java:112) ~[stardog-webconsole-annex-4.2.jar:?]

at com.complexible.stardog.protocols.http.server.HttpMessageEncoder.write(HttpMessageEncoder.java:158) [stardog-protocols-http-server-4.2.jar:?]

at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:633) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext.access$1900(AbstractChannelHandlerContext.java:32) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.write(AbstractChannelHandlerContext.java:908) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.run(AbstractChannelHandlerContext.java:893) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]

ERROR 2016-11-09 15:25:06,498 [StardogServer.WorkerGroup-1] com.complexible.stardog.protocols.http.server.HttpMessageEncoder:write(171): There was an error writing the HTTP response

java.lang.NullPointerException

at com.complexible.stardog.protocols.http.server.io.ResponseBodyEncoders$12.encode(ResponseBodyEncoders.java:418) ~[stardog-protocols-http-server-4.2.jar:?]

at com.complexible.stardog.protocols.http.server.io.ResponseBodyEncoders$2.encode(ResponseBodyEncoders.java:104) ~[stardog-protocols-http-server-4.2.jar:?]

at com.complexible.stardog.protocols.http.annex.QueryPanelEncoder.encode(QueryPanelEncoder.java:112) ~[stardog-webconsole-annex-4.2.jar:?]

at com.complexible.stardog.protocols.http.server.HttpMessageEncoder.write(HttpMessageEncoder.java:158) [stardog-protocols-http-server-4.2.jar:?]

at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:633) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext.access$1900(AbstractChannelHandlerContext.java:32) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.write(AbstractChannelHandlerContext.java:908) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.run(AbstractChannelHandlerContext.java:893) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]

ERROR 2016-11-09 15:25:06,498 [StardogServer.WorkerGroup-1] com.complexible.stardog.protocols.http.server.HttpMessageEncoder:createErrorResponse(288): The result encoder received an error message it could not encode, error was:

java.lang.NullPointerException

at com.complexible.stardog.protocols.http.server.io.ResponseBodyEncoders$12.encode(ResponseBodyEncoders.java:418) ~[stardog-protocols-http-server-4.2.jar:?]

at com.complexible.stardog.protocols.http.server.io.ResponseBodyEncoders$2.encode(ResponseBodyEncoders.java:104) ~[stardog-protocols-http-server-4.2.jar:?]

at com.complexible.stardog.protocols.http.annex.QueryPanelEncoder.encode(QueryPanelEncoder.java:112) ~[stardog-webconsole-annex-4.2.jar:?]

at com.complexible.stardog.protocols.http.server.HttpMessageEncoder.write(HttpMessageEncoder.java:158) [stardog-protocols-http-server-4.2.jar:?]

at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:633) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext.access$1900(AbstractChannelHandlerContext.java:32) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.write(AbstractChannelHandlerContext.java:908) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.run(AbstractChannelHandlerContext.java:893) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [netty-all-4.0.32.Final.jar:4.0.32.Final]

at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]

[Stephen Nowell]

Hi,

What version of Stardog are you running? What was the query and what command are you using to attempt the export?

Thanks,
Stephen

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[Samur Araujo]

I think the problem is with construct type of queries.

Example:

try this query and then export.

construct {?s a ?o} where {?s ?p ?o } limit 100

I use stardog 4.2

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Senior Data Scientist 

Geophy 

www.geophy.com

Nieuwe Plantage 54-55
2611XK  Delft
+31 (0)70 7640725 

1 Fore Street
EC2Y 9DT  London
+44 (0)20 37690760

[Stephen Nowell]

Hi Samur,

Thank you for reporting this. It turns out there is a bug in the webconsole that prevents the exporting of CONSTRUCT queries. We have created internal ticket #3255 for this and it will be fixed in the upcoming 4.2.1 release.

In the meantime, you can use the CLI (`stardog query myDb "construct {?s a ?o} where {?s ?p ?o}" --format rdfxml`) or the Java API, as those are both unaffected.

Cheers,
Stephen

stardog+u...@clarkparsia.com