2262 [main] INFO  com.datastax.driver.core  - DataStax Java driver 3.8.0 for Apache Cassandra

2346 [main] INFO  com.datastax.driver.core.GuavaCompatibility  - Detected Guava < 19 in the classpath, using legacy compatibility layer

2853 [main] INFO  com.datastax.driver.core.ClockFactory  - Using native clock to generate timestamps.

3173 [main] INFO  com.datastax.driver.core.NettyUtil  - Found Netty's native epoll transport in the classpath, using it

3594 [main] WARN  org.apache.tinkerpop.gremlin.server.GremlinServer  - Graph [graph] configured at [/etc/opt/janusgraph/janusgraph.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]

at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:81)

at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:69)

at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:103)

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.<init>(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.<init>(ServerGremlinExecutor.java:80)

at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:122)

at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.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(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:77)

... 13 more

Caused by: java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cql.CQLStoreManager

at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:64)

at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:440)

at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:411)

at org.janusgraph.graphdb.configuration.builder.GraphDatabaseConfigurationBuilder.build(GraphDatabaseConfigurationBuilder.java:50)

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)

... 18 more

Caused by: 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.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:58)

... 24 more

Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1:9042 (com.datastax.driver.core.exceptions.TransportException: [/127.0.0.1:9042] Cannot connect))

at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:268)

at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:107)

at com.datastax.driver.core.Cluster$Manager.negotiateProtocolVersionAndConnect(Cluster.java:1813)

at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1726)

at com.datastax.driver.core.Cluster.init(Cluster.java:214)

at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:387)

at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:366)

at com.datastax.driver.core.Cluster.connect(Cluster.java:311)

at org.janusgraph.diskstorage.cql.CQLStoreManager.initializeSession(CQLStoreManager.java:320)

at org.janusgraph.diskstorage.cql.CQLStoreManager.<init>(CQLStoreManager.java:182)

... 29 more