titan- elasticseach and com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex

Question

I am a newbie with titan.

I am using ubuntu 12.04 and using cassandra 2.0 and ES 1.0 installed from deb packages.

I am trying to get ES to work with titan.

gremlin> g = TitanFactory.open('/var/titan-cassandra-0.4.2/conf/titan-cassandra.properties') 
Could not find implementation class: com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex

storage.index.search.backend=elasticsearch
storage.index.search.hostname=127.0.0.1
storage.index.search.cluster-name=elasticsearch
storage.index.search.index-name=titan
storage.index.search.client-only=true
storage.index.search.sniff=false
storage.index.search.local-mode=false

So..does titan work wit ES?

update...

I am now using the server version for 4.2 titan-server-0.4.2.zip. Now I get the below.

gremlin> g = TitanFactory.open('/var/titan-server-0.4.2/conf/titan-server.properties')
WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [0] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@1f6d83b9, error [true], resetting
Could not instantiate implementation: com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex
Display stack trace? [yN] WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [1] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@2e37735d, error [true], resetting
WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [2] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@62c436b7, error [true], resetting
WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [3] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@21cccaf3, error [true], resetting
WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [4] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@597b112, error [true], resetting
WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [5] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@76088b4b, error [true], resetting
WARN  org.elasticsearch.transport.netty  - [Key] Message not fully read (response) for [6] handler org.elasticsearch.client.transport.TransportClientNodesService$SniffNodesSampler$1$1@547da7dd, error [true], resetting

Answer 1

You have to use ElasticSearch 0.90.5, which is corresponding to the version that is used by Titan 0.4.2.

Cassandra 2.0 is okay although Titan 0.4.2 packages with 1.2.

Answer 2

Sorry we couldn't get to your issue in a more timely fashion. As suggested on the mailing list this morning, you likely have a dependency problem as that error is indicative of titan-es-x.y.z.jar not being around. What version of Titan did you download? Note the feature matrix:

https://github.com/thinkaurelius/titan/wiki/Downloads#wiki-feature-matrix

You won't have ES packaged unless you download Titan Server or Titan All. We hope to improve packaging in Titan 0.5 to make things easier.