gremlin-groovy is not an available GremlinScriptEngine

[kovid1304]

I am trying to run JanusGraph to read data stored in cassandra table running on seprate pod . i have deployed docker image of janusgraph in my kubernetes cluster to read the data from Cassandra and I am getting this error and the Gremlin server gives me this output-
178 [main] INFO org.apache.tinkerpop.gremlin.server.GremlinServer - Configuring Gremlin Server from /opt/janusgraph/conf/gremlin-server/gremlin-server.yaml
264 [main] INFO org.apache.tinkerpop.gremlin.server.util.MetricManager - Configured Metrics ConsoleReporter configured with report interval=180000ms
267 [main] INFO org.apache.tinkerpop.gremlin.server.util.MetricManager - Configured Metrics CsvReporter configured with report interval=180000ms to fileName=/tmp/gremlin-server-metrics.csv
353 [main] INFO org.apache.tinkerpop.gremlin.server.util.MetricManager - Configured Metrics JmxReporter configured with domain= and agentId=
362 [main] INFO org.apache.tinkerpop.gremlin.server.util.MetricManager - Configured Metrics Slf4jReporter configured with interval=180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics
1013 [main] INFO com.datastax.driver.core.GuavaCompatibility - Detected Guava < 19 in the classpath, using legacy compatibility layer
1153 [main] INFO com.datastax.driver.core.Native - Could not load JNR C Library, native system calls through this library will not be available (set this logger level to DEBUG to see the full stack trace).
1153 [main] INFO com.datastax.driver.core.ClockFactory - Using java.lang.System clock to generate timestamps.
1261 [main] INFO com.datastax.driver.core.NettyUtil - Found Netty's native epoll transport in the classpath, using it
1855 [main] INFO com.datastax.driver.core.policies.DCAwareRoundRobinPolicy - Using data-center name 'Pod' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
1857 [main] INFO com.datastax.driver.core.Cluster - New Cassandra host /192.168.109.214:9042 added
1857 [main] INFO com.datastax.driver.core.Cluster - New Cassandra host cassandra/192.168.63.183:9042 added
1858 [main] INFO com.datastax.driver.core.Cluster - New Cassandra host /192.168.184.203:9042 added
2187 [main] ERROR org.janusgraph.diskstorage.configuration.backend.CommonsConfiguration - Failed to parse configuration string "[20, 20]" into type class java.lang.Integer due to the following reflection exception
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.janusgraph.diskstorage.configuration.backend.CommonsConfiguration.constructFromStringArgument(CommonsConfiguration.java:134)
at org.janusgraph.diskstorage.configuration.backend.CommonsConfiguration.get(CommonsConfiguration.java:79)
at org.janusgraph.diskstorage.configuration.BasicConfiguration.get(BasicConfiguration.java:68)
at org.janusgraph.diskstorage.configuration.BasicConfiguration.getAll(BasicConfiguration.java:95)
at org.janusgraph.diskstorage.configuration.builder.ReadConfigurationBuilder.getOptionsWithDiscrepancies(ReadConfigurationBuilder.java:242)
at org.janusgraph.diskstorage.configuration.builder.ReadConfigurationBuilder.checkOptionsWithDiscrepancies(ReadConfigurationBuilder.java:215)
at org.janusgraph.diskstorage.configuration.builder.ReadConfigurationBuilder.buildGlobalConfiguration(ReadConfigurationBuilder.java:91)
at org.janusgraph.graphdb.configuration.builder.GraphDatabaseConfigurationBuilder.build(GraphDatabaseConfigurationBuilder.java:53)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:161)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:132)
at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:78)
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:70)
at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:104)
at org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager.lambda$new$0(DefaultGraphManager.java:57)
at java.util.LinkedHashMap$LinkedEntrySet.forEach(LinkedHashMap.java:671)
at org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager.(DefaultGraphManager.java:55)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.(ServerGremlinExecutor.java:80)
at org.apache.tinkerpop.gremlin.server.GremlinServer.(GremlinServer.java:120)
at org.apache.tinkerpop.gremlin.server.GremlinServer.(GremlinServer.java:84)
at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.java:343)
Caused by: java.lang.NumberFormatException: For input string: "[20, 20]"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.(Integer.java:867)
... 33 more
4414 [main] WARN org.apache.tinkerpop.gremlin.server.GremlinServer - Graph [graph] configured at [conf/gremlin-server/janusgraph-cql.properties] could not be instantiated and will not be available in Gremlin Server. GraphFactory message: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]

[FlorianHockmann]

Can you please show how you configure JanusGraph Server? It sounds like the config is broken:

 Failed to parse configuration string "[20, 20]"