Tinkerpop 和 ArangoDB：MissingPropertyException：没有这样的属性：class 的图表：Script1

Question

我正在尝试将 ArangoDB 用作 community supported provider for Tinkerpop，以便我可以在 Python 项目中使用 Gremlin，但出现以下错误：

[ERROR] DefaultGremlinScriptEngineManager - Could not create GremlinScriptEngine for gremlin-groovy
java.lang.IllegalStateException: javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: graph for class: Script1

我已经按照 Wiki 定义了 properties and yaml 个配置文件。

这是我的 properties 配置 conf/modern-arangodb.properties:

gremlin.graph = com.arangodb.tinkerpop.gremlin.structure.ArangoDBGraph
gremlin.arangodb.conf.graph.db = tinkerpop
gremlin.arangodb.conf.graph.name = modern
gremlin.arangodb.conf.graph.vertex = Place
gremlin.arangodb.conf.graph.edge = Transition
gremlin.arangodb.conf.arangodb.hosts = 127.0.0.1:8529
gremlin.arangodb.conf.arangodb.user = root
gremlin.arangodb.conf.arangodb.password = openSesame

这是我的 yaml 配置 conf/gremlin-server-arangodb.yaml:

host: localhost
port: 8182
scriptEvaluationTimeout: 30000
channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer
graphs: {
  modern: conf/modern-arangodb.properties}
scriptEngines: {
  gremlin-groovy: {
    plugins: { org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
               com.arangodb.tinkerpop.gremlin.jsr223.ArangoDBGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},
               org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: [scripts/empty-sample.groovy]}}}}
serializers:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}             # application/vnd.gremlin-v3.0+gryo
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { serializeResultToString: true }}                                                                       # application/vnd.gremlin-v3.0+gryo-stringd
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}         # application/json
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV2d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV2d0] }}         # application/vnd.gremlin-v2.0+json
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1 }                                                                                                            # application/vnd.graphbinary-v1.0
processors:
  - { className: org.apache.tinkerpop.gremlin.server.op.session.SessionOpProcessor, config: { sessionTimeout: 28800000 }}
  - { className: org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor, config: { cacheExpirationTime: 600000, cacheMaxSize: 1000 }}
metrics: {
  consoleReporter: {enabled: true, interval: 180000},
  csvReporter: {enabled: true, interval: 180000, fileName: /tmp/gremlin-server-metrics.csv},
  jmxReporter: {enabled: true},
  slf4jReporter: {enabled: true, interval: 180000}}
strictTransactionManagement: false
idleConnectionTimeout: 0
keepAliveInterval: 0
maxInitialLineLength: 4096
maxHeaderSize: 8192
maxChunkSize: 8192
maxContentLength: 65536
maxAccumulationBufferComponents: 1024
resultIterationBatchSize: 64
writeBufferLowWaterMark: 32768
writeBufferHighWaterMark: 65536
ssl: {
  enabled: false}

然后我使用 ArangoDB docker image（版本 3.6.3）和运行:

docker run -p 8529:8529 -e ARANGO_ROOT_PASSWORD=openSesame arangodb/arangodb:3.6.3

然后我运行 Gremlin 服务器（版本 3.4.6）和运行:

GREMLIN_YAML=conf/gremlin-server-arangodb.yaml bin/gremlin-server.sh console

之后终端returns出现上述错误No such property: graph for class: Script1

Answer 1

问题

问题与配置有关。

配置文件conf/gremlin-server-arangodb.yaml提到了一个key/value由属性文件定义的图表对列表：

graphs: {
  modern: conf/modern-arangodb.properties}

然后在 scriptEngines.gremlin-groovy.plugins 它引用：

ScriptFileGremlinPlugin: {files: [scripts/empty-sample.groovy]}

它指定了一个名为 g 的图表。

（在脚本文件中 scripts/empty-sample.groovy）：

globals << [g : graph.traversal().withStrategies(ReferenceElementStrategy.instance())]

没有定义全局的graph，实际上在yaml文件中调用了modern。

分辨率

因此，对 gremlin-server-arangodb.yaml 文件进行了细微更改。此外，conf/modern-arangodb.properties 图形名称已更改为匹配。

已更新conf/modern-arangodb.properties：

gremlin.graph = com.arangodb.tinkerpop.gremlin.structure.ArangoDBGraph
gremlin.arangodb.conf.graph.db = tinkerpop
gremlin.arangodb.conf.graph.name = graph
gremlin.arangodb.conf.graph.vertex = Place
gremlin.arangodb.conf.graph.edge = Transition
gremlin.arangodb.conf.arangodb.hosts = 127.0.0.1:8529
gremlin.arangodb.conf.arangodb.user = root
gremlin.arangodb.conf.arangodb.password = openSesame

已更新conf/gremlin-server-arangodb.yaml：

host: localhost
port: 8182
scriptEvaluationTimeout: 600000
channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer
graphs: {
  graph: conf/modern-arangodb.properties}
scriptEngines: {
  gremlin-groovy: {
    plugins: { org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
               com.arangodb.tinkerpop.gremlin.jsr223.ArangoDBGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},
               org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: [scripts/empty-sample.groovy]}}}}
serializers:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}             # application/vnd.gremlin-v3.0+gryo
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { serializeResultToString: true }}                                                                       # application/vnd.gremlin-v3.0+gryo-stringd
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}         # application/json
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV2d0, config: { ioRegistries: [org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV2d0] }}         # application/vnd.gremlin-v2.0+json
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1 }                                                                                                            # application/vnd.graphbinary-v1.0
processors:
  - { className: org.apache.tinkerpop.gremlin.server.op.session.SessionOpProcessor, config: { sessionTimeout: 28800000 }}
  - { className: org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor, config: { cacheExpirationTime: 600000, cacheMaxSize: 1000 }}
metrics: {
  consoleReporter: {enabled: true, interval: 180000},
  csvReporter: {enabled: true, interval: 180000, fileName: /tmp/gremlin-server-metrics.csv},
  jmxReporter: {enabled: true},
  slf4jReporter: {enabled: true, interval: 180000}}
strictTransactionManagement: false
idleConnectionTimeout: 0
keepAliveInterval: 0
maxInitialLineLength: 4096
maxHeaderSize: 8192
maxChunkSize: 8192
maxContentLength: 65536
maxAccumulationBufferComponents: 1024
resultIterationBatchSize: 64
writeBufferLowWaterMark: 32768
writeBufferHighWaterMark: 65536
ssl: {
  enabled: false}

Tinkerpop 和 ArangoDB：MissingPropertyException：没有这样的 属性：class 的图表：Script1

Tinkerpop and ArangoDB : MissingPropertyException: No such property: graph for class: Script1

gremlin

arangodb

docker

gremlin-server

问题

分辨率

Tinkerpop 和 ArangoDB：MissingPropertyException：没有这样的属性：class 的图表：Script1