Failed to connect VTTablet

Vitess 0.12, and keep getting errors:

Nov 26, 2021 3:51:48 PM io.vitess.shaded.io.grpc.internal.ManagedChannelOrphanWrapper$ManagedChannelReference cleanQueue
SEVERE: *~*~*~ Channel ManagedChannelImpl{logId=23354, target=10.224.72.227:15999} was not shutdown properly!!! ~*~*~*
Make sure to call shutdown()/shutdownNow() and wait until awaitTermination() returns true.
java.lang.RuntimeException: ManagedChannel allocation site
at io.vitess.shaded.io.grpc.internal.ManagedChannelOrphanWrapper$ManagedChannelReference.(ManagedChannelOrphanWrapper.java:93)
at io.vitess.shaded.io.grpc.internal.ManagedChannelOrphanWrapper.(ManagedChannelOrphanWrapper.java:53)
at io.vitess.shaded.io.grpc.internal.ManagedChannelOrphanWrapper.(ManagedChannelOrphanWrapper.java:44)
at io.vitess.shaded.io.grpc.internal.ManagedChannelImplBuilder.build(ManagedChannelImplBuilder.java:596)
at io.vitess.shaded.io.grpc.ForwardingChannelBuilder.build(ForwardingChannelBuilder.java:255)
at com.jd.jdbc.queryservice.TabletDialer.dial(TabletDialer.java:49)
at com.jd.jdbc.discovery.TabletHealthCheck.getTabletQueryServiceLocked(TabletHealthCheck.java:132)
at com.jd.jdbc.discovery.TabletHealthCheck.getHealthCheckQueryService(TabletHealthCheck.java:121)
at com.jd.jdbc.discovery.TabletHealthCheck.startHealthCheckStream(TabletHealthCheck.java:217)
at com.jd.jdbc.discovery.HealthCheck$1.lambda$run$0(HealthCheck.java:410)
at java.base/java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1603)
at com.jd.jdbc.discovery.HealthCheck$1.run(HealthCheck.java:383)
at java.base/java.util.TimerThread.mainLoop(Timer.java:556)
at java.base/java.util.TimerThread.run(Timer.java:506)