This commit fixes the issue of creating member dir before validating
the configuration. When member dir exists, it indicates the local etcd
process is a valid etcd member. So we should only create member dir
after we finish configuration validation, joining validation or
discovery validation.
The raft loop would block on the applier's done channel after
persisting the raft messages; the latency could cause dropped network
messages. Instead, asynchronously notify the applier with a buffered
channel when the raft writes complete.
raft's applyc writes block on the server loop's database IO since
the next applyc read must wait on the db operation to finish.
Instead, stream applyc to a run queue outside the server loop.
In this case, we know we are waiting for an action happened on
storage. We can do a busy wait instead of calling waitSchedule.
The test previously failed on CI with no observed actions.
When a watch stream closes, both of the watcher.Chan and closec
will be closed.
If watcher.Chan is closed, we should not send out the empty event.
Sending the empty is wrong and waste a lot of CPU resources.
Instead we should just return.
We should open real txn for applying txn requests. Or the intermediate
state might be observed by reader.
This also fixes#3803. Same consistent(raft) index per multiple indenpendent
operations confuses consistentStore.
We have a structure called InternalRaftRequest. Making the function
shorter by calling it processInternalRaftReq seems to be random and
reduce the readability. So we just use the full name.
This commit fixes an error log caused by the strict reconfig checking
option.
Before:
14:21:38 etcd2 | 2015-11-05 14:21:38.870356 E | etcdhttp: got unexpected response error (etcdserver: re-configuration failed due to not enough started members)
After:
log
13:27:33 etcd2 | 2015-11-05 13:27:33.089364 E | etcdhttp: etcdserver: re-configuration failed due to not enough started members
The error is not an unexpected thing therefore the old message is
incorrect.
This moves the code to create listener and roundTripper for raft communication
to the same place, and use explicit functions to build them. This prevents
possible development errors in the future.
