IllegalStateException：必须将Gremlin Server配置为使用JanusGraphManager
Set graphNames = JanusGraphFactory.getGraphNames(); for(String name:graphNames) { System.out.println(name); } 上面的代码片段产生以下exception
java.lang.IllegalStateException: Gremlin Server must be configured to use the JanusGraphManager. at com.google.common.base.Preconditions.checkState(Preconditions.java:173) at org.janusgraph.core.JanusGraphFactory.getGraphNames(JanusGraphFactory.java:175) at com.JanusTest.controllers.JanusController.getPersonDetail(JanusController.java:66)
my.properties
gremlin.graph=org.janusgraph.core.JanusGraphFactory storage.backend=cql storage.hostname=127.0.0.1 cache.db-cache = true cache.db-cache-clean-wait = 20 cache.db-cache-time = 180000 cache.db-cache-size = 0.5 index.search.backend=elasticsearch index.search.hostname=127.0.0.1
小鬼，server.yaml
host: 0.0.0.0 port: 8182 scriptEvaluationTimeout: 30000 channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer graphManager: org.janusgraph.graphdb.management.JanusGraphManager graphs: { ConfigurationManagementGraph: conf/my.properties, } plugins: - janusgraph.imports scriptEngines: { gremlin-groovy: { imports: [java.lang.Math], staticImports: [java.lang.Math.PI], scripts: [scripts/empty-sample.groovy]}} serializers: - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }} - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0, config: {ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }} - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }} - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }} - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }} - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }} 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}, 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
这个答案与其他问题类似。
需要JanusGraphFactory.getGraphNames()的调用发送到远程服务器。 如果您在Gremlin控制台中工作，请首先建立远程会话连接，然后设置远程控制台模式。
gremlin> :remote connect tinkerpop.server conf/remote.yaml session ==>Configured localhost/127.0.0.1:8182 gremlin> :remote console ==>All scripts will now be sent to Gremlin Server - [localhost:8182]-[5206cdde-b231-41fa-9e6c-69feac0fe2b2] - type ':remote console' to return to local mode
然后如JanusGraph文档中所述“ 列出图形 ”：
ConfiguredGraphFactory.getGraphNames()将返回一组图表名称，您已使用ConfigurationManagementGraph API为其创建了配置。
JanusGraphFactory.getGraphNames()返回一组您已实例化的图形名称，并且引用存储在JanusGraphManager中。
如果您没有使用Gremlin控制台，那么您应该使用远程客户端（例如TinkerPop gremlin-driver （Java））将您的请求发送到Gremlin服务器。