keyspace: fail to split keyspace group twice

[lhy1024]

Bug Report

What did you do?

run a cluster with pre-alloc "keyspace_a" and "keyspace_b"

run ./pd-ctl keyspace-group 0 1 2

but it keep in split and fail to split again

What did you expect to see?

split twice successful

What did you see instead?

failed

What version of PD are you using (pd-server -V)?

master

[lhy1024]

It is a bug in pd client.

We create tsoSvcDiscovery with setServiceMode in

pd/client/client.go

Line 504 in a0beaef

c.pdSvcDiscovery = newPDServiceDiscovery(

And we get keyspace id with loadKeyspaceMeta in

pd/client/client.go

Line 510 in a0beaef

if err := c.initRetry(c.loadKeyspaceMeta, keyspaceName); err != nil {

We only update keyspaceID in pdSvcDiscovery and tsoSvcDiscovery still use default keyspace.