# Facing error while using jsonb datatype while using Yugabyte as the persistent store for Janusgraph **URL:** \ **Category:** General\ **Created:** [November 6, 2020, 4:17am UTC](https://forum.yugabyte.com/t/facing-error-while-using-jsonb-datatype-while-using-yugabyte-as-the-persistent-store-for-janusgraph/862 "2020-11-06T04:17:25Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ankitch](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@ankitch](https://forum.yugabyte.com/u/ankitch)\ **Post date:** [November 6, 2020, 4:17am UTC](https://forum.yugabyte.com/t/facing-error-while-using-jsonb-datatype-while-using-yugabyte-as-the-persistent-store-for-janusgraph/862/1 "2020-11-06T04:17:25Z")
Getting this error on gremlin console while running command “bin/yugabyted start” on yugabyte terminal I’m using yugabyte as a storage backend with janusgraph as a middleware to connect it with gremlin server. 1702 [main] ERROR com.datastax.driver.core.SchemaParser - Error parsing schema for table system.metrics: Cluster.getMetadata().getKeyspace(“system”).getTable(“metrics”) will be missing or incomplete com.datastax.driver.core.exceptions.UnresolvedUserTypeException: Cannot resolve user type system.jsonb at com.datastax.driver.core.DataTypeCqlNameParser.parse(DataTypeCqlNameParser.java:138) at com.datastax.driver.core.TableMetadata.build(TableMetadata.java:311) at com.datastax.driver.core.SchemaParser.buildTables(SchemaParser.java:301) at com.datastax.driver.core.SchemaParser.buildKeyspaces(SchemaParser.java:202) at com.datastax.driver.core.SchemaParser.refresh(SchemaParser.java:108) at com.datastax.driver.core.ControlConnection.refreshSchema(ControlConnection.java:411) at com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:322) at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:233) 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.(CQLStoreManager.java:182) 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) at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:440) at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:411) ---
**Author:** ![dorian\_yugabyte](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.yugabyte.com/dorian_yugabyte/32/206_2.png) [@dorian\_yugabyte](https://forum.yugabyte.com/u/dorian_yugabyte)\ **Post date:** [November 6, 2020, 9:08am UTC](https://forum.yugabyte.com/t/facing-error-while-using-jsonb-datatype-while-using-yugabyte-as-the-persistent-store-for-janusgraph/862/2 "2020-11-06T09:08:43Z")
Hi @ankitch Welcome to YugabyteDB Forum! Are you using our fork of the driver [GitHub - yugabyte/cassandra-java-driver: YugabyteDB Java Driver for YCQL, based on the DataStax Java Driver](https://github.com/yugabyte/cassandra-java-driver) ? We have added jsonb support there. Regards, Dorian Technical Support Engineer ---
**Author:** ![ankitch](https://avatars.discourse-cdn.com/v4/letter/a/ce7236/32.png) [@ankitch](https://forum.yugabyte.com/u/ankitch)\ **Post date:** [November 6, 2020, 9:37am UTC](https://forum.yugabyte.com/t/facing-error-while-using-jsonb-datatype-while-using-yugabyte-as-the-persistent-store-for-janusgraph/862/3 "2020-11-06T09:37:59Z")
> [@dorian\_yugabyte](#): > > Are you using our fork of the driver Thank you for the response, no we are not using the fork of the driver, we will use and update here