We noticed that TestUpstreamListener would deadlock sometimes when run
with the race detector. While debugging this issue I found and fixed the
following problems.
1. the net.Listener was not being closed properly when Listener.Stop was
called. This caused the Listener.Serve goroutine to run forever.
Fixed by storing a reference to net.Listener and closing it properly
when Listener.Stop is called.
2. call connWG.Add in the correct place. WaitGroup.Add must be called
before starting a goroutine, not from inside the goroutine.
3. Set metrics config EnableRuntimeMetrics to `false` so that we don't
start a background goroutine in each test for no reason. There is no
way to shutdown this goroutine, and it was an added distraction while
debugging these timeouts.
5. two tests were calling require.NoError from a goroutine.
require.NoError calls t.FailNow, which MUST be called from the main
test goroutine. Instead use t.Errorf, which can be called from other
goroutines and will still fail the test.
6. `assertCurrentGaugeValue` wass breaking out of a for loop, which
would cause the `RWMutex.RUnlock` to be missed. Fixed by calling
unlock before `break`.
The core issue of a deadlock was fixed by https://github.com/armon/go-metrics/pull/124.
Previous getFromView would call view.Result when the result may not have been returned
(because the index is updated past the minIndex. This would allocate a slice and sort it
for no reason, because the values would never be returned.
Fix this by re-ordering the operations in getFromView.
The test changes in this commit were an attempt to cover the case where
an update is received but the index does not exceed the minIndex.
Also rename it to readEntry now that it doesn't return the entire entry. Based on feedback
in PR review, the full entry is not used by the caller, and accessing the fields wouldn't be
safe outside the lock, so it is safer to return only the Materializer
grpclog.SetLoggerV2 is meant to be called only once before any gRPC requests are received, but
each test that uses TestAgent will call NewBaseDeps again. Use a sync.Once to prevent the grpc
logging from being re-initialized by each test.
This will mean that a test can't use a fake logger to capture logs from the gRPC server.
These tests can flake when we get a notification for an earlier event.
Retry the read from update channel a few times to make sure we get the
event we expect.
Split the TestStreamingClient into the two logical components the real
client uses. This allows us to test multiple clients properly.
Previously writing of ctx from multiple Subscribe calls was showing a
data race.
Once this was fixed a test started to fail because the request had to be
made with a greater index, so that the store.Get call did not return
immediately.
The idleTTL was being written and read concurrently. Instead move the idleTTL to a struct
field so that when one test patches the TTL it does not impact others.
The background goroutines for the store can outlive a test because context cancellation
is async.
Setting this field to a value is equivalent to using the 'near' query paramter.
The intent is to sort the results by proximity to the node requesting
them. However with connect we send the results to envoy, which doesn't
care about the order, so setting this field is increasing the work
performed for no gain.
It is necessary to unset this field now because we would like connect
to use streaming, but streaming does not support sorting by proximity.
Remove View.Result error return value, it was always nil, and seems like it will likely always remain nill
since it is simply reading a stored value.
Also replace some cache types with local types.
And only start expiration time when the last request ends. This makes tracking expiry simpler, and
ensures that no entry can be expired while there are active requests.
* CLI: Add support for reading internal raft snapshots to snapshot inspect
* Add snapshot inspect test for raw state files
* Add changelog entry
* Update .changelog/10089.txt
* website: add back unlinked pages to match previous state
* website: add unlinked content check
* website: add hidden nav-data to unlinked content check
Daniel Nephin
Jamie Finnigan
Kenia
hc-github-team-consul-core
John Cowen
Zachary Shilton
Matt Keeler
Paul Banks
R.B. Boyer