etcd panic-ed, so defrag response just blocked for "days"
when the actual 'v3rpc' path never returned.
We should catch this earlier.
ref. https://github.com/coreos/etcd/issues/7526
Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
The checkers and stressers should be composable without special cases; this
patch tries to address that while refactoring out some old cruft.
Namely,
* Single stresser/checker for a tester; built from composition
* Composite stresser via comma-separated list of stressers
* Split stressers into separate files
* Removed v2 only flags and special cases
* Rate limiter shared among key stresser and leases stresser
* Composite checker is now concurrent
* Stresser can return a Checker to check its invariants
* Each lease checker only operates on a single lease stresser
The following format "http://localhost:1234" causes existing port parser to fail. Add new logic to parse the host name first then extract port.
Fixes#6409
1. fix failure case counting
2. match ErrClientConnClosing in stresser
3. longer timeout for set-health-key
4. fixed range for range/delete stresser
5. remove Limit in RangeRequest
