Reimplemented close/idle_timeout/stop/onGoAway/input_shutdown following more closely the specification.
In particular, the semantic of sending a GOAWAY is now to:
* stop creation of new both local and remote streams
* record the last processed stream
* continue processing streams that are pending
This means that a GOAWAY is "graceful" in the sense that it allows for streams to be completed by applications.
The semantic of stop() and idle timeout is harsher: for pending streams a RST_STREAM is sent to the other peer and they are failed locally.
Added support for GOAWAY with 2^31-1 lastStreamId.
Added support for a peer to send and receive multiple GOAWAY frames.
Reviewed the stream creation/destruction mechanism so that when the last stream completes after a GOAWAY, proper actions can be run to tear down the connection.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
* Fixes#3766 - Introduce HTTP/2 API to batch frames.
Introduced Stream.FrameList to hold HEADERS+DATA+HEADERS frames.
These are often used by the client and by the server when the
request/response content is known and FrameList will allow to
send them in a single TCP write, rather than multiple ones.
Rewritten HttpSenderOverHTTP2.sendHeaders() and
HttpTransportOverHTTP2.sendHeaders() to take advantage of
FrameList.
Now using ConcurrentHashMap as a client context, because
with DEBUG logging enabled it may be access concurrently.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Reworked HTTP/2 release after an exchange is terminated.
Previously, the release was bound to 2 events: onStreamClosed(),
introduced for #2796, and exchangeTerminated().
Unfortunately, if the former happens before the latter and
closes the connection, the latter will see the exchange as
aborted, while in fact it was successful, causing what
reported in #5147, an AsynchronousCloseException.
Now, the release is always performed by the exchangeTerminated()
event. With respect to #2796, the stream is always already
closed by the time the exchangeTerminated() event fires (it
was not before).
Reworked the implementation of RoundRobinConnectionPool using
a lock and aggressively trying to open new connections.
A second fix is related to HttpDestination.release(Connection).
If the connection is closed for e.g. overuse, we need to trigger
the processing of queued requests via send(create: true).
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Fixed MaxConcurrentStreamsTest - it was always broken.
The problem was that the call to super.onSettings(...) was done
_after_ sending the request, so the connection pool was still
configured with the default maxMultiplex=1024.
Also fixed AbstractConnectionPool to avoid a second call to
activate() if we are not trying to create a new connection.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
* Fixes#4855 - Occasional h2spec failures on CI
In case of bad usage of the HTTP/2 API, we don't want to close()
the stream but just fail the callback, because the stream
may be performing actions triggered by a legit API usage.
In case of a call to `AsyncListener.onError()`, applications may decide to call
AsyncContext.complete() and that would be a correct usage of the Servlet API.
This case was not well handled and was wrongly producing a WARN log with an
`IllegalStateException`.
Completely rewritten `HttpTransportOverHTTP2.TransportCallback`.
The rewrite handles correctly asynchronous failures that now are executed
sequentially (and not concurrently) with writes.
If a write is in progress, the failure will just change the state and at the
end of the write a check on the state will determine what actions to take.
A session failure is now handled in HTTP2Session by first failing all the
streams - which notifies the Stream.Listeners - and then failing the session
- which notifies the Session.Listener.
The stream failures are executed concurrently by dispatching each one to a
different thread; this means that the stream failure callbacks are executed
concurrently (likely sending RST_STREAM frames).
The session failure callback is completed only when all the stream failure
callbacks have completed, to ensure that a GOAWAY frame is processed after
all the RST_STREAM frames.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
* Fixes#4904 - WebsocketClient creates more connections than needed.
Fixed connection pool's `acquire()` methods to correctly take into account the number of queued requests.
Now the connection creation is conditional, triggered by
explicit send() or failures.
The connection creation is not triggered _after_ a send(),
where we aggressively send more queued requests - or
in release(), where we send queued request after a previous
one was completed.
Now the connection close/removal aggressively sends more
requests triggering the connection creation.
Also fixed a collateral bug in `BufferingResponseListener` - wrong calculation of the max content length.
Restored `ConnectionPoolTest` that was disabled in #2540, cleaned it up, and let it run for hours without failures.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Modified jetty-alpn-openjdk8-* classes to support both
pre 8u252 (via alpn-boot) and post 8u252 (via standard API).
Replaced usages of -Xbootclasspath with -javaagent, and
using Jetty ALPN Agent jar rather than Jetty ALPN boot jar.
Removed all alpn-1.8.0*.mod files since now it is
possible to use a fixed version of the ALPN Agent
to cover all the versions.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Now correctly handling no demand before the content
in FCGI and HTTP2 transports.
Fixed HttpRequest to correctly forward onBeforeContent()
to wrapped listeners.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
* Issue #4265 Remove doError
The doError method and the ErrorDispatchHandler class were
hang overs from when we needed to dispatch into a context to get sendError called, which would then generate the error page.
Now sendError doesn't do any generation, rather it changes state that arranges either for a minimal error page to be generated or an ERROR dispatch to a real handler/servlet to generate the error page.
Thus the ErrorDispatchHandler and doError methods can now be removed.
Signed-off-by: Greg Wilkins <gregw@webtide.com>
* Issue #4265 Remove doError
Moved the error page dispatching logic back to the ErrorHandler class to assist with backwards compatibility
Signed-off-by: Greg Wilkins <gregw@webtide.com>
* Issue #4265 Remove doError
Moved the error page dispatching logic back to the ErrorHandler class to assist with backwards compatibility
Signed-off-by: Greg Wilkins <gregw@webtide.com>
* Issue #4265 doError
Updates from review.
Signed-off-by: Greg Wilkins <gregw@webtide.com>
Invalid HTTP/2 headers are now causing an error rather than being ignored.
HTTP2Flusher now catches HpackException.StreamException and generates a
RST_STREAM frame, rather than just closing the connection.
Modified HpackEncoder to throw HpackException in case of encoding failure.
Introduced HpackEncoder.validateEncoding (defaults true) so validation of
the headers can be disabled (useful for tests).
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
