Janusgraph 1.0.0 with cassandra backend : Error No serializers

Question

When trying to setup janusgraph 1.0.0 with CS & ES backend i am getting following error :

13:01:23 ERROR org.apache.tinkerpop.gremlin.server.AbstractChannelizer.configureSerializers - No serializers were successfully configured - server will not start.
13:01:23 ERROR org.apache.tinkerpop.gremlin.server.GremlinServer.start - Gremlin Server Error
java.lang.RuntimeException: Serialization configuration error.
    at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.configureSerializers(AbstractChannelizer.java:294) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.init(AbstractChannelizer.java:144) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer.init(WebSocketChannelizer.java:67) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.apache.tinkerpop.gremlin.server.GremlinServer.start(GremlinServer.java:167) [gremlin-server-3.7.0.jar:3.7.0]
    at org.janusgraph.graphdb.server.JanusGraphServer.start(JanusGraphServer.java:98) [janusgraph-server-1.0.0.jar:?]
    at org.janusgraph.graphdb.server.JanusGraphServer.main(JanusGraphServer.java:53) [janusgraph-server-1.0.0.jar:?]
13:01:23 ERROR org.janusgraph.graphdb.server.JanusGraphServer.lambda$main$0 - JanusGraph Server was unable to start and will now begin shutdown
java.util.concurrent.CompletionException: java.lang.RuntimeException: Serialization configuration error.
    at java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source) ~[?:?]
    at java.util.concurrent.CompletableFuture.uniAcceptNow(Unknown Source) [?:?]
    at java.util.concurrent.CompletableFuture.uniAcceptStage(Unknown Source) [?:?]
    at java.util.concurrent.CompletableFuture.thenAcceptAsync(Unknown Source) [?:?]
    at org.janusgraph.graphdb.server.JanusGraphServer.start(JanusGraphServer.java:99) ~[janusgraph-server-1.0.0.jar:?]
    at org.janusgraph.graphdb.server.JanusGraphServer.main(JanusGraphServer.java:53) [janusgraph-server-1.0.0.jar:?]
Caused by: java.lang.RuntimeException: Serialization configuration error.
    at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.configureSerializers(AbstractChannelizer.java:294) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.init(AbstractChannelizer.java:144) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer.init(WebSocketChannelizer.java:67) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.apache.tinkerpop.gremlin.server.GremlinServer.start(GremlinServer.java:167) ~[gremlin-server-3.7.0.jar:3.7.0]
    at org.janusgraph.graphdb.server.JanusGraphServer.start(JanusGraphServer.java:98) ~[janusgraph-server-1.0.0.jar:?]
    ... 1 more
13:01:23 INFO  org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$stop$2 - Shutting down OpProcessor[]
13:01:23 INFO  org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$stop$2 - Shutting down OpProcessor[session]
13:01:23 INFO  org.apache.tinkerpop.gremlin.server.GremlinServer.lambda$stop$2 - Shutting down OpProcessor[traversal]
13:01:23 INFO  org.apache.tinkerpop.gremlin.server.GremlinServer.stop - Shutting down thread poo

Any guidelines would help.

Thanks, Atul

Answer 1

I am experiencing a quite similar problem when upgrading Janusgraph from v0.6.0 to v1.0.0. Please check below all errors I am getting back as soon as I start the service (janusgraph.service)

ERROR org.apache.tinkerpop.gremlin.server.AbstractChannelizer.configureSerializers - No serializers were successfully configured - server will not start.

ERROR org.apache.tinkerpop.gremlin.server.GremlinServer.start - Gremlin Server Error

java.lang.RuntimeException: Serialization configuration error.
ERROR org.janusgraph.graphdb.server.JanusGraphServer.lambda$main$0 - JanusGraph Server was unable to start and will now begin shutdown

java.util.concurrent.CompletionException: java.lang.RuntimeException: Serialization configuration error.

Caused by: java.lang.RuntimeException: Serialization configuration error.

Please check my gremlin-server.yaml serializers status as well.

 serializers:
 - { className: org.apache.tinkerpop.gremlin.util.ser.GraphBinaryMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
 - { className: org.apache.tinkerpop.gremlin.util.ser.GraphBinaryMessageSerializerV1, config: { serializeResultToString: true }}
 - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONMessageSerializerV3, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  # Older serialization versions for backwards compatibility:
 - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONMessageSerializerV2, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
 - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}
 - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONUntypedMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}

Answer 2

Eventually I was able to solve the problem myself. Check the below if needed!

#
serializers:
  - { className: org.apache.tinkerpop.gremlin.util.ser.GraphBinaryMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.util.ser.GraphBinaryMessageSerializerV1, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONMessageSerializerV3, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  # Older serialization versions for backwards compatibility:
  - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONMessageSerializerV2, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}
  - { className: org.apache.tinkerpop.gremlin.util.ser.GraphSONUntypedMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}