title: GraphFactory could not instantiate this Graph implementation [class org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph]]
body: <p>I have High Availability cluster(Neo4j) in which on master I have gremlin server and on slave there is gremlin console. But when I start gremlin server on master I get following error. I tried the same procedure with different versions of gremlin server and console but I am unable to access graph from gremlin console. When I hit g.V() in console I get error of gremlin-groovy is not an available GremlinScriptEngine" in gremlin console.</p>
  
  <pre><code>ec2-user@ip-172-31-0-10 apache-tinkerpop-gremlin-server-3.4.2]$ sudo bin/greml                                                                                        in-server.sh ./conf/gremlin-server-neo4j.yaml
  [INFO] GremlinServer - 3.4.2
           \,,,/
           (o o)
  -----oOOo-(3)-oOOo-----
  
  [INFO] GremlinServer - Configuring Gremlin Server from ./conf/gremlin-server-neo                                                                                        4j.yaml
  [INFO] MetricManager - Configured Metrics ConsoleReporter configured with report                                                                                         interval=180000ms
  [INFO] MetricManager - Configured Metrics CsvReporter configured with report int                                                                                        erval=180000ms to fileName=/tmp/gremlin-server-metrics.csv
  [INFO] MetricManager - Configured Metrics JmxReporter configured with domain= an                                                                                        d agentId=
  [INFO] MetricManager - Configured Metrics Slf4jReporter configured with interval                                                                                        =180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jRepor                                                                                        terMetrics
  [WARN] DefaultGraphManager - Graph [graph] configured at [conf/neo4j-ha.properti                                                                                        es] could not be instantiated and will not be available in Gremlin Server.  Grap                                                                                        hFactory message: GraphFactory could not instantiate this Graph implementation [                                                                                        class org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph]
  java.lang.RuntimeException: GraphFactory could not instantiate this Graph implem                                                                                        entation [class org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph]
          at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFa                                                                                        ctory.java:82)
          at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFa                                                                                        ctory.java:70)
          at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFa                                                                                        ctory.java:104)
          at org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager.lambda$n                                                                                        ew$0(DefaultGraphManager.java:57)
          at java.util.LinkedHashMap$LinkedEntrySet.forEach(LinkedHashMap.java:671                                                                                        )
          at org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager.&lt;init&gt;(D                                                                                        efaultGraphManager.java:55)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct                                                                                        orAccessorImpl.java:62)
          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC                                                                                        onstructorAccessorImpl.java:45)
          at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
          at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.&lt;init&gt;                                                                                        (ServerGremlinExecutor.java:80)
          at org.apache.tinkerpop.gremlin.server.GremlinServer.&lt;init&gt;(GremlinServe                                                                                        r.java:122)
          at org.apache.tinkerpop.gremlin.server.GremlinServer.&lt;init&gt;(GremlinServe                                                                                        r.java:86)
          at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.                                                                                        java:345)
  Caused by: java.lang.reflect.InvocationTargetException
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.                                                                                        java:62)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces                                                                                        sorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFa                                                                                        ctory.java:78)
          ... 13 more
  Caused by: java.lang.ClassCastException: java.util.ArrayList cannot be cast to j                                                                                        ava.lang.String
          at org.neo4j.graphdb.factory.GraphDatabaseBuilder.setConfig(GraphDatabas                                                                                        eBuilder.java:126)
          at org.neo4j.tinkerpop.api.impl.Neo4jFactoryImpl.newGraphDatabase(Neo4jF                                                                                        actoryImpl.java:45)
          at org.neo4j.tinkerpop.api.Neo4jFactory$Builder.open(Neo4jFactory.java:3                                                                                        2)
          at org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph.&lt;init&gt;(Neo4jG                                                                                        raph.java:125)
          at org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph.open(Neo4jGra                                                                                        ph.java:139)
          ... 18 more
  [INFO] ServerGremlinExecutor - Initialized Gremlin thread pool.  Threads in pool                                                                                         named with pattern gremlin-*
  [INFO] ServerGremlinExecutor - Initialized GremlinExecutor and preparing Gremlin                                                                                        ScriptEngines instances.
  [ERROR] DefaultGremlinScriptEngineManager - Could not create GremlinScriptEngine                                                                                         for gremlin-groovy
  java.lang.IllegalStateException: javax.script.ScriptException: javax.script.Scri                                                                                        ptException: groovy.lang.MissingPropertyException: No such property: graph for c                                                                                        lass: Script1
          at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager                                                                                        .lambda$createGremlinScriptEngine$16(DefaultGremlinScriptEngineManager.java:464)
          at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:18                                                                                        4)
          at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:                                                                                        193)
          at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.j                                                                                        ava:1382)
          at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.jav                                                                                        a:580)
          at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:                                                                                        270)
          at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.j                                                                                        ava:1382)
          at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
          at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.ja                                                                                        va:471)
          at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.j                                                                                        ava:151)
          at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEac                                                                                        hOps.java:174)
          at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
          at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418                                                                                        )
          at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager                                                                                        .createGremlinScriptEngine(DefaultGremlinScriptEngineManager.java:450)
          at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager                                                                                        .getEngineByName(DefaultGremlinScriptEngineManager.java:219)
          at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.                                                                                        lambda$getEngineByName$0(CachedGremlinScriptEngineManager.java:57)
          at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHash                                                                                        Map.java:1660)
          at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.                                                                                        getEngineByName(CachedGremlinScriptEngineManager.java:57)
          at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eva                                                                                        l$0(GremlinExecutor.java:266)
          at java.util.concurrent.FutureTask.run(FutureTask.java:266)
          at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:51                                                                                        1)
          at java.util.concurrent.FutureTask.run(FutureTask.java:266)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.                                                                                        java:1149)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor                                                                                        .java:624)
          at java.lang.Thread.run(Thread.java:748)
  Caused by: javax.script.ScriptException: javax.script.ScriptException: groovy.la                                                                                        ng.MissingPropertyException: No such property: graph for class: Script1
          at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.                                                                                        eval(GremlinGroovyScriptEngine.java:378)
          at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
          at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager                                                                                        .lambda$createGremlinScriptEngine$16(DefaultGremlinScriptEngineManager.java:460)
          ... 24 more
  Caused by: javax.script.ScriptException: groovy.lang.MissingPropertyException: N                                                                                        o such property: graph for class: Script1
          at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.                                                                                        eval(GremlinGroovyScriptEngine.java:697)
          at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.                                                                                        eval(GremlinGroovyScriptEngine.java:376)
          ... 26 more
  Caused by: groovy.lang.MissingPropertyException: No such property: graph for cla                                                                                        ss: Script1
          at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptByteco                                                                                        deAdapter.java:65)
          at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(                                                                                        PogoGetPropertySite.java:51)
          at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjec                                                                                        tGetProperty(AbstractCallSite.java:309)
          at Script1.run(Script1.groovy:45)
          at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.                                                                                        eval(GremlinGroovyScriptEngine.java:674)
          ... 27 more
  [WARN] ServerGremlinExecutor - Could not initialize gremlin-groovy GremlinScript                                                                                        Engine as init script could not be evaluated
  java.util.concurrent.CompletionException: java.lang.IllegalArgumentException: gr                                                                                        emlin-groovy is not an available GremlinScriptEngine
          at java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.j                                                                                        ava:375)
          at java.util.concurrent.CompletableFuture.join(CompletableFuture.java:19                                                                                        34)
          at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.lambda                                                                                        $new$4(ServerGremlinExecutor.java:141)
          at java.util.LinkedHashMap$LinkedKeySet.forEach(LinkedHashMap.java:559)
          at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.&lt;init&gt;                                                                                        (ServerGremlinExecutor.java:136)
          at org.apache.tinkerpop.gremlin.server.GremlinServer.&lt;init&gt;(GremlinServe                                                                                        r.java:122)
          at org.apache.tinkerpop.gremlin.server.GremlinServer.&lt;init&gt;(GremlinServe                                                                                        r.java:86)
          at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.                                                                                        java:345)
  Caused by: java.lang.IllegalArgumentException: gremlin-groovy is not an availabl                                                                                        e GremlinScriptEngine
          at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.                                                                                        registerLookUpInfo(CachedGremlinScriptEngineManager.java:95)
          at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.                                                                                        getEngineByName(CachedGremlinScriptEngineManager.java:58)
          at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eva                                                                                        l$0(GremlinExecutor.java:266)
          at java.util.concurrent.FutureTask.run(FutureTask.java:266)
          at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:51                                                                                        1)
          at java.util.concurrent.FutureTask.run(FutureTask.java:266)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.                                                                                        java:1149)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor                                                                                        .java:624)
          at java.lang.Thread.run(Thread.java:748)
  [INFO] OpLoader - Adding the standard OpProcessor.
  [INFO] OpLoader - Adding the session OpProcessor.
  [INFO] OpLoader - Adding the traversal OpProcessor.
  [INFO] TraversalOpProcessor - Initialized cache for TraversalOpProcessor with si                                                                                        ze 1000 and expiration time of 600000 ms
  [INFO] GremlinServer - idleConnectionTimeout was set to 0 which resolves to 0 se                                                                                        conds when configuring this value - this feature will be disabled
  [INFO] GremlinServer - keepAliveInterval was set to 0 which resolves to 0 second                                                                                        s when configuring this value - this feature will be disabled
  [INFO] AbstractChannelizer - Configured application/vnd.gremlin-v3.0+gryo with o                                                                                        rg.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0
  [INFO] AbstractChannelizer - Configured application/vnd.gremlin-v3.0+gryo-string                                                                                        d with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0
  [INFO] AbstractChannelizer - Configured application/vnd.gremlin-v3.0+json with o                                                                                        rg.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
  [INFO] AbstractChannelizer - Configured application/json with org.apache.tinkerp                                                                                        op.gremlin.driver.ser.GraphSONMessageSerializerV3d0
  [INFO] AbstractChannelizer - Configured application/vnd.graphbinary-v1.0 with or                                                                                        g.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1
  [INFO] GremlinServer$1 - Gremlin Server configured with worker thread pool of 1,                                                                                         gremlin pool of 1 and boss thread pool of 1.
  [INFO] GremlinServer$1 - Channel started at port 8182.
  </code></pre>