Without this change, alloc_endpoint cancel the context passed to handler
when we detect EOF. This races driver in setting exit code; and we run
into a case where the exec process terminates cleanly yet we attempt to
mark it as failed with context error.
Here, we rely on the driver to handle errors returned from Stream and
without racing to set an error.
Previous commit could introduce a deadlock if the capacityChangeCh was
full and the receiving side exited before freeing a slot for the sending
side could send. Flush would then block forever waiting to acquire the
lock just to throw the pending update away.
The race is around getting/setting the chan field, not chan operations,
so only lock around getting the chan field.
I assume the mutex was being released before sending on capacityChangeCh
to avoid blocking in the critical section, but:
1. This is race.
2. capacityChangeCh has a *huge* buffer (8096). If it's full things
already seem Very Bad, and a little backpressure seems appropriate.
Nomad 0.9 incidentally set effective capabilities that is higher than
what's expected of a `nobody` process, and what's set in 0.8.
This change restores the capabilities to ones used in Nomad 0.9.
`*Config.ConfigureTLS()` is invoked internally by `NewClient` and API
consumers should not invoke directly.
Now that http client is created in `api.NewClient`,
`*Config.ConfigureTLS` makes no sense. API consumers that call it
explicitly can remove the invocation and preserve the behavior.
Allow clients to configure httpClient, e.g. set a pooled/keep-alive
client.
When caller configures HttpClient explicitly, we aim to use as-is; e.g.
we assume it's configured with TLS already. Expose `ConfigureTLS` to
aid api consumers with configuring their http client.
Also, removes `SetTimeout` call that I believe is internal only and has
odd side-effects when called on already created config. Also deprecates
`config.ConfigureTLS` in preference to the new `ConfigureTLS`.
Handle stalled readers (e.g. network write got stalled), by having
escaping io have a buffer so it looks for escaped characters in the
stream.
This simplifies the implementation considerably, as we can look
for new lines followed by escaped characters directly.
Also, we add a test to ensure that any partial results are flushed to
readers.
