https://tools.ietf.org/html/rfc7540#section-5.3.3 explains how to
transform dependency tree to avoid circular dependency. Previously,
we wrongly always moved the dependent stream under the root stream.
The correct destination is the parent stream of the stream to
reprioritize. This commit fixes this bug.
nghttp2_on_invalid_header_callback is similar to
nghttp2_on_header_callback, but the former is only called when the
invalid header field is received which is silently ignored when the
callback is not set. With this callback, application inspects the
incoming invalid field, and it also can reset stream from this
callback by returning NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE, or using
nghttp2_submit_rst_stream() directly with the error code of choice.
We also added nghttp2_on_invalid_header_callback2, which uses
reference counted header fields.
We have a code to call error callback when invalid header is received
and it is treated as stream error. But we didn't if the incoming
header is invalid, but just ignored. This generosity is required to
handle public Internet connections especially when nghttp2 is used as
forward proxy.
This commit also fixes the bug that old configuration is still used
for worker process. The another bug fix is that inherited, but not
used fd is not closed in worker process. That makes reloading next
configuration fail if it contains the address which are leaked into
worker process.
This commit implements configuration reloading with SIGHUP.
There are rough edges left:
* Rename SignalServer with more meaningful name, say, WorkerProcess.
* We should introduce global configuration object which is not
affected by configuration reloading. It should hold cmdcfgs, argc,
argv, and last worker PID.
* We should close the listener file descriptor when some operation was
failed after that.
The N-th -p options sets N-th URI's weight. If the number of -p is
less than the number of URIs, the last -p value is repeated. If no -p
is set, use default weight, 16.
clang + libc++ does not work, it still requires libc++_shared.so
runtime even if -lstdc++ is used, which supposed to link with static
version of libc++.
Previously, we didn't retry request on connection failure. Sometimes
we hit the edge case where connection is about to lost just when we
write request. To avoid this situation, we now retry request to
failed attempt. We also add ConnectBlocker to MemcachedConnection not
to attempt to connect to memcached if connection could not be made
previously.
Tatsuhiro Tsujikawa
Wenfeng Liu
Tomasz Buchert