dosubot[bot] commented on issue #620:
URL:
https://github.com/apache/incubator-hugegraph-toolchain/issues/620#issuecomment-2327791934
<!-- Answer -->
To resolve the error "gremlin-groovy is not an available
GremlinScriptEngine" when using the Huddle tool to connect to the graph
database, ensure that the `gremlin-groovy` script engine is properly configured
in the `gremlin-server.yaml` file.
Here is the relevant section from the `gremlin-server.yaml` file that shows
how to configure the `gremlin-groovy` script engine:
```yaml
scriptEngines: {
gremlin-groovy: {
staticImports: [
org.opencypher.gremlin.process.traversal.CustomPredicates.*',
org.opencypher.gremlin.traversal.CustomFunctions.*
],
plugins: {
org.apache.hugegraph.plugin.HugeGraphGremlinPlugin: {},
org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin:
{},
org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {
classImports: [
java.lang.Math,
org.apache.hugegraph.backend.id.IdGenerator,
org.apache.hugegraph.type.define.Directions,
org.apache.hugegraph.type.define.NodeRole,
org.apache.hugegraph.masterelection.GlobalMasterInfo,
org.apache.hugegraph.util.DateUtil,
org.apache.hugegraph.traversal.algorithm.CollectionPathsTraverser,
org.apache.hugegraph.traversal.algorithm.CountTraverser,
org.apache.hugegraph.traversal.algorithm.CustomizedCrosspointsTraverser,
org.apache.hugegraph.traversal.algorithm.CustomizePathsTraverser,
org.apache.hugegraph.traversal.algorithm.FusiformSimilarityTraverser,
org.apache.hugegraph.traversal.algorithm.HugeTraverser,
org.apache.hugegraph.traversal.algorithm.JaccardSimilarTraverser,
org.apache.hugegraph.traversal.algorithm.KneighborTraverser,
org.apache.hugegraph.traversal.algorithm.KoutTraverser,
org.apache.hugegraph.traversal.algorithm.MultiNodeShortestPathTraverser,
org.apache.hugegraph.traversal.algorithm.NeighborRankTraverser,
org.apache.hugegraph.traversal.algorithm.PathsTraverser,
org.apache.hugegraph.traversal.algorithm.PersonalRankTraverser,
org.apache.hugegraph.traversal.algorithm.SameNeighborTraverser,
org.apache.hugegraph.traversal.algorithm.ShortestPathTraverser,
org.apache.hugegraph.traversal.algorithm.SingleSourceShortestPathTraverser,
org.apache.hugegraph.traversal.algorithm.SubGraphTraverser,
org.apache.hugegraph.traversal.algorithm.TemplatePathsTraverser,
org.apache.hugegraph.traversal.algorithm.steps.EdgeStep,
org.apache.hugegraph.traversal.algorithm.steps.RepeatEdgeStep,
org.apache.hugegraph.traversal.algorithm.steps.WeightedEdgeStep,
org.apache.hugegraph.traversal.optimize.ConditionP,
org.apache.hugegraph.traversal.optimize.Text,
org.apache.hugegraph.traversal.optimize.TraversalUtil,
org.opencypher.gremlin.traversal.CustomFunctions,
org.opencypher.gremlin.traversal.CustomPredicate
],
methodImports: [
java.lang.Math#*,
org.opencypher.gremlin.traversal.CustomPredicate#*,
org.opencypher.gremlin.traversal.CustomFunctions#*
]
},
org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {
files: [scripts/empty-sample.groovy]
}
}
}
}
```
Ensure that this section is correctly included in your `gremlin-server.yaml`
file and that the `gremlin-groovy` script engine is properly defined with the
necessary plugins and imports. Additionally, make sure that the
`gremlin-server.yaml` file includes other necessary configurations such as
host, port, serializers, and authentication settings as shown below:
```yaml
host: 127.0.0.1
port: 8181
evaluationTimeout: 30000
channelizer: org.apache.tinkerpop.gremlin.server.channel.WsAndHttpChannelizer
graphs: {
}
authentication: {
authenticator: org.apache.hugegraph.auth.StandardAuthenticator,
config: {
tokens: conf/rest-server.properties
}
}
serializers:
- { className:
org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1,
config: {
serializeResultToString: false,
ioRegistries: [org.apache.hugegraph.io.HugeGraphIoRegistry]
}
}
- { className:
org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0,
config: {
serializeResultToString: false,
ioRegistries: [org.apache.hugegraph.io.HugeGraphIoRegistry]
}
}
- { className:
org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV2d0,
config: {
serializeResultToString: false,
ioRegistries: [org.apache.hugegraph.io.HugeGraphIoRegistry]
}
}
- { className:
org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0,
config: {
serializeResultToString: false,
ioRegistries: [org.apache.hugegraph.io.HugeGraphIoRegistry]
}
}
metrics: {
consoleReporter: {enabled: false, interval: 180000},
csvReporter: {enabled: false, interval: 180000, fileName:
./metrics/gremlin-server-metrics.csv},
jmxReporter: {enabled: false},
slf4jReporter: {enabled: false, interval: 180000},
gangliaReporter: {enabled: false, interval: 180000, addressingMode:
MULTICAST},
graphiteReporter: {enabled: false, interval: 180000}
}
maxInitialLineLength: 4096
maxHeaderSize: 8192
maxChunkSize: 8192
maxContentLength: 65536
maxAccumulationBufferComponents: 1024
resultIterationBatchSize: 64
writeBufferLowWaterMark: 32768
writeBufferHighWaterMark: 65536
ssl: {
enabled: false
}
```
This should resolve the error and allow the Huddle tool to connect to the
graph database successfully
<sup>[[1]](https://github.com/apache/incubator-hugegraph-doc/blob/master/content/en/docs/config/config-guide.md)</sup><sup>[[2]](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-hubble/hubble-dist/assembly/travis/hugegraph-server1/gremlin-server.yaml)</sup><sup>[[3]](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-hubble/hubble-dist/assembly/travis/hugegraph-server2/gremlin-server.yaml)</sup><sup>[[4]](https://github.com/apache/incubator-hugegraph/blob/master/docker/configs/server1-conf/gremlin-server.yaml)</sup>.
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