SEVERE: [Channel<1>: (localhost:2379)] Uncaught exception in the SynchronizationContext. Panic!

[g83wang]

I am trying to benchmark etcd with YCSB. So, I created an etcd interface for YCSB by using jetcd.
But I keep getting the exception below.
Could someone please advise on why it happens and how to resolve it?
Thank you in advance.

SEVERE: [Channel<1>: (localhost:2379)] Uncaught exception in the SynchronizationContext. Panic!
java.lang.NoClassDefFoundError: io/perfmark/PerfMark
at io.grpc.internal.ClientCallImpl.(ClientCallImpl.java:106)
at io.grpc.internal.ManagedChannelImpl$RealChannel$1.newCall(ManagedChannelImpl.java:958)
at io.grpc.internal.ManagedChannelImpl$RealChannel.newClientCall(ManagedChannelImpl.java:1147)
at io.grpc.internal.ManagedChannelImpl$RealChannel.access$4600(ManagedChannelImpl.java:939)
at io.grpc.internal.ManagedChannelImpl$RealChannel$PendingCall$1.run(ManagedChannelImpl.java:1109)
at io.vertx.grpc.VertxChannelBuilder.lambda$build$1(VertxChannelBuilder.java:300)
at io.grpc.internal.ManagedChannelImpl$RealChannel$PendingCall.reprocess(ManagedChannelImpl.java:1102)
at io.grpc.internal.ManagedChannelImpl$RealChannel.updateConfigSelector(ManagedChannelImpl.java:1035)
at io.grpc.internal.ManagedChannelImpl$NameResolverListener$1NamesResolved.run(ManagedChannelImpl.java:1825)
at io.grpc.SynchronizationContext.drain(SynchronizationContext.java:95)
at io.grpc.SynchronizationContext.execute(SynchronizationContext.java:127)
at io.grpc.internal.ManagedChannelImpl$NameResolverListener.onResult(ManagedChannelImpl.java:1875)
at io.grpc.internal.DnsNameResolver$Resolve.run(DnsNameResolver.java:333)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)

[lburgazzoli]

you probably have different version of grpc in the classpath

[g83wang]

you probably have different version of grpc in the classpath

Thank you for your reply.
I am new to this. Could you please also suggest how to locate and resolve the issue?
Thank you.

[lburgazzoli]

That's depends on your project.
You should try to exclude the grpc dependecies from jetcd and forse a specific version