tree 0e11986a7f6a72eb48a1361cf86f59bccdb95bc8
parent 7db1564ba1229bc42919bb1f6d9c4186f3aa8678
author Benoit Sigoure <tsunanet@gmail.com> 1503685132 +0100
committer mmukhi <mmukhi@google.com> 1503685132 -0700

transport: Fix deadlock in client keepalive. (#1460)

When gRPC keepalives are enabled (which isn't the case by default at
this time) and PermitWithoutStream is false (the default), the client
can deadlock when transitioning between having no active stream and
having one active stream.  Subsequent attempts to create a new stream
or to close the client will hang on the transport's mutex, while the
keepalive goroutine is waiting indefinitely on a channel while holding
the transport's mutex.

This fixes #1459.