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目前 advanced-java 只有 [yanglbme](http

Today, etcdctl endpoint health only performs a quorum GET. If server is corrupted or exceeded quota (which put the server into read only mode), this command incorrectly returns healthy.

Currently, the C++ compiler generates lots of warnings: https://xgboost-ci.net/blue/organizations/jenkins/xgboost/detail/master/516/pipeline/61. It would be great to reduce the number of warnings.

Note to new contributors: Post a comment here if you'd like to work on this issue. Feel free to ping me for help.

The Akka modules page in the docs (https://doc.akka.io/docs/akka/current/typed/guide/modules.html) doesn't include Akka Projections:

https://github.com/akka/akka/blob/294c534d1533e1bcf1c425af6137d51bdbc25e6f/akka-docs/src/main/paradox/typed/guide/modules.md#L7-L15

Let's support at least reading "b3" header from a single string, most commonly traceid-spanid-1
It would also be nice to support optionally writing this, especially in message providers or others with constrained environments.

Expected behavior

As discussed on openzipkin/b3-propagation#21 and first implemented here: https://github.com/openzipkin/brave/blob/master/brave/src/main/java/bra

Hello Philip!
I think there is an issue with this part of the code of rqlite (store/store.go).

func (s *Store) Database(leader bool) ([]byte, error) {
	if leader && s.raft.State() != raft.Leader {
		return nil, ErrNotLeader
	}
	// Ensure only one snapshot can take place at once, and block all queries.
	s.mu.Lock()
	defer s.mu.Unlock()

	f, err := ioutil.TempFile("", "rqlilte-snap-

Is your feature request related to a problem? Please describe.
Using Reset command with CLI will get code:deadline-exceeded message:timeout easily because reset requires replay in the server. It's quite resource consuming, depending on the length/size of the history.

By default the CLI context timeout is only 5 seconds:
https://github.com/uber/cadence/blob/63bdb5d7a04285cf57992c574639c9

The blockchain v2 reactor utilizes concurrency to saturate the bottleneck of writing blocks to disk. This concurrency is internal to the reactor where the reactor itself will launch and manage internal state machines running as go-routines. This configuration makes testing difficult as we don't know when messages processed by internal state machines will be processed and when we can assert that th