Example in Java client can not be run

[jackyluo-learning]

I have replaced the endpoint with my greptimeDB cluster, but failed to run Example. Someone can help?
The exception can be seen below:

Exception in thread "main" java.util.concurrent.ExecutionException: io.grpc.StatusRuntimeException: INTERNAL: failed to decode Protobuf message: InsertExpr.expr: ObjectExpr.expr: DatabaseRequest.exprs: BatchRequest.databases: invalid string value: data is not UTF-8 encoded
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908)
at io.greptime.example.Example.runInsert(Example.java:111)
at io.greptime.example.Example.main(Example.java:77)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: failed to decode Protobuf message: InsertExpr.expr: ObjectExpr.expr: DatabaseRequest.exprs: BatchRequest.databases: invalid string value: data is not UTF-8 encoded
at io.grpc.Status.asRuntimeException(Status.java:535)
at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:487)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at io.greptime.rpc.interceptors.ClientRequestLimitInterceptor$1$1.onClose(ClientRequestLimitInterceptor.java:87)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at io.grpc.internal.DelayedClientCall$DelayedListener$3.run(DelayedClientCall.java:470)
at io.grpc.internal.DelayedClientCall$DelayedListener.delayOrExecute(DelayedClientCall.java:434)
at io.grpc.internal.DelayedClientCall$DelayedListener.onClose(DelayedClientCall.java:467)
at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:563)
at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:744)

[evenyag]

Already answered in GreptimeTeam/greptimedb-client-java#9