Hi Marc, 

Sorry for slow reply, I missed the response notification (if one was sent). Anyways, I tried out your suggestion, and it seems like it might be an issue rather than just inconsistent behaviour. Details below:

 

gremlin> graph = JanusGraphFactory.build().set('storage.backend','hbase').set('storage.hbase.table','janusgraph').open()

==>standardjanusgraph[hbase:[127.0.0.1]]

gremlin> 

gremlin> m=graph.openManagement()

==>org.janusgraph.graphdb.database.management.ManagementSystem@fe7b6b0

gremlin> vl=m.makeVertexLabel('system').partition().make()

==>system

gremlin> pk=m.makePropertyKey('system_id').dataType(String.class).make()

==>system_id

gremlin> i=m.buildIndex('idx_system_id', Vertex.class).addKey(pk).indexOnly(vl).unique().buildCompositeIndex()

==>idx_system_id

gremlin> m.commit()

==>null

gremlin>  g=graph.traversal()

==>graphtraversalsource[standardjanusgraph[hbase:[127.0.0.1]], standard]

gremlin> g.addV('system').property('system_id','A') 

==>v[4226]

gremlin> g.tx().commit()

==>null

gremlin> g.addV('system').property('system_id','A')

==>v[8202]

gremlin> g.tx().commit()

==>null

gremlin> g.V()

==>v[8202]

==>v[4226]

gremlin> g.V().properties()

==>vp[system_id->A]

==>vp[system_id->A]

On Friday, March 17, 2017 at 8:57:37 PM UTC, HadoopMarc wrote:

Hi Ivan,

When I first read your question on March 6 I thought this one was not for me, but I see now that you still did not get an answer. I agree it looks suspicious, but there is still one thing I would like you to try: in the first code block when you add the vertex for the second time, could you try a commit then?   What may be the case is that you get an immediate error when a second identical vertex is added within the same transaction, but that you get a uniqueness error across transactions only at commit time of the second transaction.

Cheers,    Marc

Op maandag 6 maart 2017 17:58:25 UTC+1 schreef Ivan Cikic:

So, evaluating JanusGraph for a project, I ran into this: unique index on a Vertex property with a specific VertexLabel constraint doesn't seem to be respected across transactions? Or I'm just doing something wrong? Code snippet below should reproduce the issue.

plugin activated: janusgraph.imports
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
plugin activated: tinkerpop.hadoop
plugin activated: tinkerpop.spark
plugin activated: tinkerpop.tinkergraph

gremlin> graph = JanusGraphFactory.build().set('storage.backend','hbase').set('storage.hbase.table','janusgraph').open()
==>standardjanusgraph[hbase:[127.0.0.1]]
gremlin> m=graph.openManagement()
==>org.janusgraph.graphdb.database.management.ManagementSystem@541179e7
gremlin> vl=m.makeVertexLabel('system').partition().make()
==>system
gremlin> pk=m.makePropertyKey('system_id').dataType(String.class).make()
==>system_id
gremlin> i=m.buildIndex('idx_system_id', Vertex.class).addKey(pk).indexOnly(vl).unique().buildCompositeIndex()
==>idx_system_id
gremlin> m.commit()
==>null
gremlin> g=graph.traversal()
==>graphtraversalsource[standardjanusgraph[hbase:[127.0.0.1]], standard]
gremlin> g.addV('system').property('system_id','A')  
==>v[4226]                                                              <-- add Vertex: OK
gremlin> g.tx().commit()
==>null
gremlin> g.addV('system').property('system_id','A')
==>v[8202]                                                              <-- add Vertex with same property value: OK
gremlin> g.addV('system').property('system_id','A')                     <-- add Vertex with same property value same TX: FAIL
Adding this property for key [system_id] and value [A] violates a uniqueness constraint [idx_system_id]

Compared to this behaviour when using unique index without a VertexLabel constraint:

gremlin> graph = JanusGraphFactory.build().set('storage.backend','hbase').set('storage.hbase.table','janusgraph2').open()
==>standardjanusgraph[hbase:[127.0.0.1]]
gremlin> m=graph.openManagement()
==>org.janusgraph.graphdb.database.management.ManagementSystem@27443560
gremlin> vl=m.makeVertexLabel('system').partition().make()
==>system
gremlin> pk=m.makePropertyKey('system_id').dataType(String.class).make()
==>system_id
gremlin> i=m.buildIndex('idx_system_id', Vertex.class).addKey(pk).unique().buildCompositeIndex()  <-- no indexOnly
==>idx_system_id
gremlin> m.commit()
==>null
gremlin> g=graph.traversal()
==>graphtraversalsource[standardjanusgraph[hbase:[127.0.0.1]], standard]
gremlin> g.addV('system').property('system_id','A')
==>v[4226]
gremlin> g.addV('system').property('system_id','A')         <-- add Vertex with same property value same TX: FAIL
Adding this property for key [system_id] and value [A] violates a uniqueness constraint [idx_system_id]
gremlin> g.tx().commit()
==>null
gremlin> g.addV('system').property('system_id','A')         <-- add Vertex with same property value new TX: FAIL
Adding this property for key [system_id] and value [A] violates a uniqueness constraint [idx_system_id]

Thanks,

Ivan