Some times i get below exception using embedded JanusServer (cassandra + es):

gremlin> g.V().valueMap()

Encountered error in deserializer [null value returned]. Check serializer compatibility.

Type ':help' or ':h' for help.

Display stack trace? [yN]y

org.apache.tinkerpop.gremlin.groovy.plugin.RemoteException: Encountered error in deserializer [null value returned]. Check serializer compatibility.

at org.apache.tinkerpop.gremlin.console.groovy.plugin.DriverRemoteAcceptor.submit(DriverRemoteAcceptor.java:170)

at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:99)

at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:122)

at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:95)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)

at sun.reflect.GeneratedMethodAccessor36.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1215)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:124)

at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:59)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)

at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)

at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1215)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132)

at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152)

at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:83)

at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)

at org.apache.tinkerpop.gremlin.console.Console.<init>(Console.groovy:152)

at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:232)

at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:455)

After restarting the JanusServer it starts working.

~AnkurG

Hi,

 In JanusGraph to create edges we have two steps process:

1. First identify the vertex
2. Then create edges between vertex

Linkage between both steps is through App only.

How ever in neo4j, we can create edges using one step:

MATCH (a:player), (b:Country) WHERE a.POB = "X" AND b.name = "Y" 

CREATE (a)-[r: Z]->(b) 

RETURN a,b

Can we achieve the same in JanusGraph using Janus or tinkerpoop.

~AnkurG

Hi,

I am using JanusGraph 0.1.1. And using logback:

       <logger name="org.janusgraph" level="DEBUG" additivity="false">

<appender-ref ref="CONSOLE" />

</logger>

<logger name="org.apache" level="DEBUG" additivity="false">

<appender-ref ref="CONSOLE" />

</logger>

        <root level="debug">

<appender-ref ref="CONSOLE" />

</root>

This result in following output only:

15:28:23,108  INFO ReflectiveConfigOptionLoader:173 - Loaded and initialized config classes: 9 OK out of 12 attempts in PT0.018S

15:28:23,171  INFO Reflections:224 - Reflections took 38 ms to scan 1 urls, producing 12 keys and 25 values 

15:28:23,244  INFO CassandraThriftStoreManager:628 - Closed Thrift connection pooler.

15:28:23,251  INFO GraphDatabaseConfiguration:1563 - Generated unique-instance-id=0a96cb391964-MacBook-Pro-3-local1

15:28:23,263  INFO Backend:463 - Configuring index [search]

15:28:23,355  INFO plugins:151 - [Solarr] loaded [], sites []

15:28:23,875  INFO ElasticSearchIndex:368 - Configured remote host: 127.0.0.1 : 9300

15:28:24,043  INFO Backend:178 - Initiated backend operations thread pool of size 8

15:28:24,165  INFO KCVSLog:744 - Loaded unidentified ReadMarker start time 2017-09-13T09:58:24.152Z into org.janusgraph.diskstorage.log.kcvs.KCVSLog$MessagePuller@7fcff1b9

15:28:25,409  INFO CassandraThriftStoreManager:628 - Closed Thrift connection pooler.

How i can enable logging to see the internals and queries fired against JanusGraph.

~AnkurG

 

I added 1000 vertices to Janusgraph. When I query for a subset of them, sometimes it returns the result, sometimes it throws this RemoteException. It is not consistent. Any thoughts why this is happening ?

Only one vertex has label and all other vertices have attributes.

When I do this query - g.V().hasLabel('root').id() , it is always giving RemoteException

The first number in between should be smaller than the second. Try:

g.V().has('longitude', between(-113, -110)).limit(3)

Cheers,

Daniel

On Thu, Sep 14, 2017 at 12:14 PM, Brandon Dean <en...@...> wrote:

I have ran into an issue recently where I am receiving incorrect results when submitting certain queries.  Here is an example:

gremlin> g.V().has('longitude', between(-110, -113)).limit(3)

gremlin> g.V().has('longitude', between(-111.726, -111.72)).limit(3)

==>v[393719920]

==>v[119910496]

==>v[365723728]

The first query should have returned the results in the second query at a minimum.  I receive no errors and there is nothing in the log files that seems to indicate an issue.  My next step will be to turn on DEBUG logging, but does anyone have any suggestions on how else to troubleshoot an issue like this?

I am utilizing the builtin instance of C* and ElasticSearch with version 0.1.1 of JanusGraph.

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You should use indexes.

You should use indexes.

You can change it, just not through the properties file. You have to use the Management interface.   See  http://docs.janusgraph.org/latest/configuration.html#configuration-global

Robert Dale

On Wed, Sep 13, 2017 at 5:30 PM, J MacNaught <j...@...> wrote:

Thank you for the example, it helped to know it was supposed to work.  However, I couldn't get your example to work at first. I still got this error:

        java.lang.IllegalStateException: Need to set configuration value: root.attributes.custom.attribute-class

which is really not helpful because if you change the option name to "root.xxx" the error messages go away, but it's not really fixed.

Ultimately, the only way I could get it to work was to delete my cassandra database and start over.   I thought that options which were GLOBAL_OFFLINE could still be configured after DB initialization.

On Wednesday, September 13, 2017 at 2:42:44 PM UTC-4, Jason Plurad wrote:

That functionality works. I've ported my Titan example over to JanusGraph. You shouldn't have "root." on your properties.
Note that JanusGraph registers a standard serializer for HashMap, so an exception would have been thrown if you attempted to register one for it.

On Monday, September 11, 2017 at 5:42:02 PM UTC-4, J MacNaught wrote:

Hi all,

I'm porting my application from Titan to JanusGraph.

I was able to define a custom serializer for certain Java types, for example, ArrayList.

I cannot get this to work in JanusGraph.

I have this in my configuration: 

root.attributes.custom.attribute1.attribute-class=java.util.HashMap

root.attributes.custom.attribute1.serializer-class=com.ibm.research.psyche.core.serializer.GenericSerializer

root.attributes.custom.attribute2.attribute-class = java.util.LinkedHashMap

root.attributes.custom.attribute2.serializer-class = com.ibm.research.psyche.core.serializer.GenericSerializer

root.attributes.custom.attribute3.attribute-class = java.util.ArrayList

root.attributes.custom.attribute3.serializer-class = com.ibm.research.psyche.core.serializer.GenericSerializer

root.attributes.custom.attribute4.attribute-class = java.util.LinkedList

root.attributes.custom.attribute4.serializer-class = com.ibm.research.psyche.core.serializer.GenericSerializer

I get this error when defining the property:

java.lang.IllegalArgumentException: Not a supported data type: class java.util.ArrayList

at com.google.common.base.Preconditions.checkArgument(Preconditions.java:120) ~[guava-15.0.jar:?]

at org.janusgraph.graphdb.types.StandardPropertyKeyMaker.make(StandardPropertyKeyMaker.java:93) ~[janusgraph-core-0.1.1.jar:?]

.....

Are custom attributes supported anymore?

Note that the Configuration Reference in the documentations says that the option name should be this: 

attributes.custom.[X].attribute-class

But you get this error: java.lang.IllegalStateException: Need to set configuration value: root.attributes.custom.attribute-class

Thanks!

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