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clientv3test: add comments for clientv3test

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Signed-off-by: shaoqin2 <21689677+shaoqin2@users.noreply.github.com>
This commit is contained in:
shaoqin4 2023-11-11 18:01:48 -05:00 committed by shaoqin2
parent 7e00a1e42b
commit 089165deec
2 changed files with 12 additions and 1 deletions
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2
client/v3/ordering/util.go
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@ -29,7 +29,7 @@ func NewOrderViolationSwitchEndpointClosure(c *clientv3.Client) OrderViolationFu
violationCount := int32(0)
return func(_ clientv3.Op, _ clientv3.OpResponse, _ int64) error {
// Each request is assigned by round-robin load-balancer's picker to a different
// endpoints. If we cycled them 5 times (even with some level of concurrency),
// endpoint. If we cycled them 5 times (even with some level of concurrency),
// with high probability no endpoint points on a member with fresh data.
// TODO: Ideally we should track members (resp.opp.Header) that returned
// stale result and explicitly temporarily disable them in 'picker'.

11
tests/integration/clientv3/ordering_util_test.go
View File

@ -24,6 +24,9 @@ import (
integration2 "go.etcd.io/etcd/tests/v3/framework/integration"
)
// TestEndpointSwitchResolvesViolation ensures
// - ErrNoGreaterRev error is returned from partitioned member when it has stale revision
// - no more error after partition recovers
func TestEndpointSwitchResolvesViolation(t *testing.T) {
integration2.BeforeTest(t)
clus := integration2.NewCluster(t, &integration2.ClusterConfig{Size: 3})
@ -78,8 +81,16 @@ func TestEndpointSwitchResolvesViolation(t *testing.T) {
if err != ordering.ErrNoGreaterRev {
t.Fatal("While speaking to partitioned leader, we should get ErrNoGreaterRev error")
}
clus.Members[2].RecoverPartition(t, clus.Members[:2]...)
time.Sleep(1 * time.Second) // give enough time for the operation
_, err = orderingKv.Get(ctx, "foo")
if err != nil {
t.Fatal("After partition recovered, third member should recover and return no error")
}
}
// TestUnresolvableOrderViolation ensures ErrNoGreaterRev error is returned when available members only have stale revisions
func TestUnresolvableOrderViolation(t *testing.T) {
integration2.BeforeTest(t)
clus := integration2.NewCluster(t, &integration2.ClusterConfig{Size: 5, UseBridge: true})