Gremlin server via http

temp...@gmail.com

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Nov 2, 2016, 9:17:50 AM11/2/16

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Hi!

I'm using Stardog 4.2 and Gremlin server (TinkerPop 3.0.2). In latest version of Stardog, protocol SNARL is deprecated, but in docs gremlin-server configuration connection URL is "snarl://localhost:5820".

How run Gremlin server via HTTP?

Stardog working with TinkerPop 3.0.2 only?

Latest version 3.2.3 calling java exception.

Thanks in advance!

Zachary Whitley

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Nov 2, 2016, 12:35:41 PM11/2/16

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Specifically it supports 3.0.2-incubating which is available at https://tinkerpop.apache.org/downloads.html

http://docs.stardog.com/#_property_graphs

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temp...@gmail.com

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Nov 3, 2016, 3:52:28 AM11/3/16

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In latest version Stardog SNARL not available:

...

Stardog server is listening on all network interfaces.

HTTP server available at http://localhost:5820.

...

My gremlin config:

gremlin.graph=com.complexible.stardog.gremlin.structure.StardogGraph

stardog.connection=snarl://localhost:5820/db3

I tried set stardog.connection=http://localhost:5820/db3, but I get an exception.

How to connect gremlin via http, or enable SNARL?

Stephen Nowell

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Nov 3, 2016, 7:31:10 AM11/3/16

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Hi,

As of version 4.2, the SNARL protocol has been deprecated [1] and it will be completely removed in 5.x. You are, for now, able to start the server with the --snarl option to re-enable it, however this is just a temporary solution until the 5.x release cycle, at which point that will no longer work.

What is the exception that you get when changing snarl:// to http:// ?

Cheers,
Stephen

[1] http://docs.stardog.com/release-notes/#_4_2_release

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temp...@gmail.com

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Nov 3, 2016, 11:37:05 AM11/3/16

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[WARN] ServiceRegistry - New service class com.complexible.common.rdf.rio.writer.TurtleWriterFactory replaces existing service class org.openrdf.rio.turtle.TurtleWriterFactory

[WARN] Slf4JLogger - An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.

java.lang.NoSuchMethodError: org.apache.http.impl.client.DefaultHttpClient.execute(Lorg/apache/http/HttpHost;Lorg/apache/http/HttpRequest;Lorg/apache/http/protocol/HttpContext;)Lorg/apache/http/client/methods/CloseableHttpResponse;

at com.complexible.stardog.protocols.http.client.BaseHttpClient.executeRaw(BaseHttpClient.java:318)

at com.complexible.stardog.protocols.http.client.BaseHttpClient.execute(BaseHttpClient.java:303)

at com.complexible.stardog.protocols.http.client.HttpClientImpl.connect(HttpClientImpl.java:212)

at com.complexible.stardog.protocols.http.client.HttpClientImpl.connect(HttpClientImpl.java:93)

at com.complexible.stardog.protocols.http.client.HttpConnection.create(HttpConnection.java:44)

at com.complexible.stardog.protocols.http.client.HttpDriver.connect(HttpDriver.java:75)

at com.complexible.stardog.api.DriverManager.getConnection(DriverManager.java:74)

at com.complexible.stardog.api.ConnectionConfiguration.connect(ConnectionConfiguration.java:126)

at com.complexible.stardog.gremlin.structure.tx.AbstractStardogTransaction.connection(AbstractStardogTransaction.java:73)

at com.complexible.stardog.gremlin.structure.tx.DefaultStardogTransaction.connection(DefaultStardogTransaction.java:22)

at com.complexible.stardog.gremlin.structure.tx.DefaultStardogTransaction.doOpen(DefaultStardogTransaction.java:35)

at org.apache.tinkerpop.gremlin.structure.util.AbstractTransaction.open(AbstractTransaction.java:87)

at org.apache.tinkerpop.gremlin.structure.Transaction$READ_WRITE_BEHAVIOR$1.accept(Transaction.java:209)

at org.apache.tinkerpop.gremlin.structure.Transaction$READ_WRITE_BEHAVIOR$1.accept(Transaction.java:206)

at org.apache.tinkerpop.gremlin.structure.util.AbstractTransaction.rollback(AbstractTransaction.java:104)

at org.apache.tinkerpop.gremlin.server.GraphManager.lambda$rollbackAll$29(GraphManager.java:99)

at java.util.concurrent.ConcurrentHashMap$EntrySetView.forEach(Unknown Source)

at org.apache.tinkerpop.gremlin.server.GraphManager.rollbackAll(GraphManager.java:96)

at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.lambda$new$18(ServerGremlinExecutor.java:102)

at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.eval(GremlinExecutor.java:253)

at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.eval(GremlinExecutor.java:234)

at org.apache.tinkerpop.gremlin.server.op.AbstractEvalOpProcessor.evalOpInternal(AbstractEvalOpProcessor.java:157)

at org.apache.tinkerpop.gremlin.server.op.standard.StandardOpProcessor.evalOp(StandardOpProcessor.java:80)

at org.apache.tinkerpop.gremlin.server.handler.OpExecutorHandler.channelRead0(OpExecutorHandler.java:66)

at org.apache.tinkerpop.gremlin.server.handler.OpExecutorHandler.channelRead0(OpExecutorHandler.java:41)

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)