CODEWITHSUNDEEP
elasticsearchgremlingraph-databasesjanusgraphfull-text-indexing
Harshit Sharma
Harshit Sharma

Reputation: 83

Janusgraph not able to find suitable index for a index enabled property key

I'm working on a Janusgraph application. To improve gremlin query performance we are creating two mixed indexes, one for vertices and one for edges.

Now Janusgraph can query indexes for property keys that are created and indexed at the time of index creation i.e in the same transaction. If I'm creating and indexing a new property key in a new transaction then Janusgraph is not able to query them using indexing, instead, it does a complete graph scan.

Using Janusgeaph management API I checked that all property keys are indexed and enabled, even then Janusgraph is scanning a complete graph for querying on an indexed property key.

Is there anything I'm missing? Any help would be greatly appreciated.

Backend index engine -> ElasticSearch

Backend Storage -> Cassandra

Upvotes: 1

Views: 391

Answers (1)

TechFramer - Sanil Bagzai
TechFramer - Sanil Bagzai

Reputation: 68

Have faced this problem once. Try to reindex the created index once (Index created in some other transaction). It worked for me. Hope it works for you too.

Please find the steps below:-

For Reindex:

    mgmt = graph.openManagement()
    i = mgmt.getGraphIndex('IndexName')
    mgmt.updateIndex(i, SchemaAction.REINDEX)
    mgmt.commit()

For Enable the index:

    ManagementSystem.awaitGraphIndexStatus(graph, 'IndexName').status(SchemaStatus.ENABLED).call()

NOTE: if you get "false" in enabling the index, Try enabling it 2 3 times using the same command (ManagementSystem.awaitGraphIndexStatus(graph, 'IndexName').status(SchemaStatus.ENABLED).call()). It would work eventually.

Upvotes: 0

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