IoUring: extend user data from short to long by dreamlike-ocean · Pull Request #16682 · netty/netty

dreamlike-ocean · 2026-04-22T13:29:52Z

Motivation:

This PR extends io_uring userData handling from short to long without changing the existing fast path for short values.

We reuse Netty's IoUringIoHandler to drive some one-shot io_uring operations through a shared DefaultIoUringIoRegistration per EventLoop. In this model, short user data is too limited for real usage: it is not enough for some tracking payloads and cannot reliably carry values such as an fd or other larger identifiers.

Modification:

Keep the existing packed fast path when userData still fits in short.
Add a slow path for larger long userData values.
Track slow-path SQEs with a lightweight per-SQE table (PendingOpSlots) and resolve completions through the live registration table.
Keep the io_uring channel code and IoUringIoOps path compatible with long userData.

Result:
Keep long user data support for custom IoHandle, preserve near-baseline performance for the short user data path, and confine the remaining extra bookkeeping cost to the long user data slow path.

Design:
I also evaluated other tracking strategies, including open addressing and HashMap / LongObjectMap-style mappings.

In practice, they were not a better fit for this workload:

Open addressing with tombstones still introduced extra probe / insert / remove bookkeeping, and its CPU cost became more visible once removals were frequent or the live set grew larger.
HashMap / LongObjectMap-style solutions added extra lookup / indirection overhead on the slow path and were not competitive enough for this use case.
HashMap / LongObjectMap-style solutions add extra gc overhead on the slow path and were not competitive enough for this use case.
Some alternatives improved one side of the workload, but paid for it either with higher steady-state CPU cost or with a more expensive remove path.

The current approach is a better overall tradeoff for the target scenario:

custom IoHandle usage is relatively uncommon
collisions are expected to be rare
resizes should therefore also be uncommon
for non-network io_uring operations, SQEs usually have a short pending lifetime

That makes a simple array-backed per-SQE tracking scheme a good fit here: it keeps the common case straightforward and avoids introducing extra hot-path cost for more general but heavier data structures.

CustomIoHandleBenchmark on the current branch and 4.2 base

Fast path vs baseline

pendingOpsDepth	baseline fast	current fast	delta
4096	1,023,617 ops/s	1,024,338 ops/s	+0.07%
65536	974,757 ops/s	970,427 ops/s	-0.44%

Slow path vs current fast path

pendingOpsDepth	fast path	slow path	delta
4096	1,024,338 ops/s	944,886 ops/s	-7.76%
65536	970,427 ops/s	886,176 ops/s	-8.68%

These numbers are in the expected range for the added slow-path bookkeeping, while keeping the existing short-value fast path intact.

https://gist.github.com/dreamlike-ocean/05e7e272e0e6a9f45f40192229c938dc

fix #16634

…ng userData support

…h for custom IoHandle long userData

…th the fast path.

…vent-loop and off-loop submissions

…etween event-loop and off-loop submissions" This reverts commit 71f7822.

normanmaurer · 2026-04-23T16:59:07Z

@franz1981 @chrisvest PTAL as well

2. release slow-path slot before dispatch 3. keep registration ids positive via wraparound

normanmaurer · 2026-04-24T08:39:47Z

@franz1981 @chrisvest PTAL as well

normanmaurer

The next round of review

normanmaurer · 2026-04-24T08:52:26Z

+        private void resize() {
+            int oldCapacity = activeSequences.length;
+            int newCapacity = oldCapacity << 1;
+            if (newCapacity <= 0) {


Not sure we should really allow to grow it so much in the first place. Imho it would be better to have a smaller max capacity.

I can cap growth
but, it won’t be true fail-fast—registration may still fail asynchronously after the token is returned(off-eventloop) flow, so this is only a safety guard.

franz1981 · 2026-04-24T10:08:13Z

Gotta take a look. Likely Monday bud 🙏

normanmaurer · 2026-04-27T08:00:31Z

@yawkat you might also be interested...

normanmaurer

Great work!

normanmaurer · 2026-04-27T15:19:26Z

And @chrisvest

chrisvest · 2026-04-27T16:36:39Z

Will review it soon

dreamlike-ocean · 2026-05-07T05:53:55Z

Do you have any updates on this? @franz1981 @chrisvest

# Conflicts: # transport-classes-io_uring/src/main/java/io/netty/channel/uring/IoUringIoHandler.java

franz1981 · 2026-05-07T06:29:39Z

Today the day 🙏 sorry for the delay @dreamlike-ocean

…on the same EventLoop did a gathering write”'

chrisvest

Sorry it took so long to review this. I spotted a few things.

My main concern is that PendingOpSlots copes poorly with collisions, and can end up using a lot of memory in long running processes.

chrisvest · 2026-05-08T19:04:41Z

+            int mask = this.mask;
+            int slot = slot(sequence, mask);
+            while (activeSequences[slot] != INVALID_ID) {
+                resize();


This triggers a resize on any collision.

If there's a slot taken, that is never completed, then we'll resize every time the sequence wraps around.

Even without a slot that never completes, the arrays will still grow from the non-zero probability of collisions over long enough timescales.

I think we need a data structure that copes with this better; a hash table, or a tree.

it now uses a dedicated open-addressed mapping for slow-path token to context lookup.

…dressed map with negative tokens and tombstone reuse.

dreamlike-ocean · 2026-05-09T17:32:23Z

PendingOpMap replaces the old slow-path slot table with a hash-based map. This avoids resizing on every collision and makes slow-path token lookup more robust.

Using open addressing, it avoids extra per-entry object allocation on the slow path.
Using Fibonacci hashing to spread the monotonically increasing slow-path tokens across the table.
Using tombstones on delete, so removals do not force expensive reshuffling.

chrisvest

Couple of comments but otherwise this is looking good.

2.add more ut

All io_uring tests, except LoadClassTest, needs to be in the native module

chrisvest · 2026-05-12T20:22:09Z

Moved the new test to the native module to make the JDK8 build happy.

netty-project-bot · 2026-05-12T21:49:09Z

Auto-port PR for 5.0: #16806

Auto-port of #16682 to 5.0 Cherry-picked commit: 7f00b24 --- Motivation: This PR extends io_uring `userData` handling from `short` to `long` without changing the existing fast path for short values. We reuse Netty's `IoUringIoHandler` to drive some one-shot io_uring operations through a shared `DefaultIoUringIoRegistration` per `EventLoop`. In this model, `short` user data is too limited for real usage: it is not enough for some tracking payloads and cannot reliably carry values such as an `fd` or other larger identifiers. Modification: - Keep the existing packed fast path when `userData` still fits in `short`. - Add a slow path for larger `long userData` values. - Track slow-path SQEs with a lightweight per-SQE table (`PendingOpSlots`) and resolve completions through the live registration table. - Keep the io_uring channel code and `IoUringIoOps` path compatible with long `userData`. Result: Keep `long` user data support for custom `IoHandle`, preserve near-baseline performance for the `short` user data path, and confine the remaining extra bookkeeping cost to the `long` user data slow path. Design: I also evaluated other tracking strategies, including open addressing and `HashMap` / `LongObjectMap`-style mappings. In practice, they were not a better fit for this workload: - Open addressing with tombstones still introduced extra probe / insert / remove bookkeeping, and its CPU cost became more visible once removals were frequent or the live set grew larger. - `HashMap` / `LongObjectMap`-style solutions added extra lookup / indirection overhead on the slow path and were not competitive enough for this use case. - `HashMap` / `LongObjectMap`-style solutions add extra gc overhead on the slow path and were not competitive enough for this use case. - Some alternatives improved one side of the workload, but paid for it either with higher steady-state CPU cost or with a more expensive remove path. The current approach is a better overall tradeoff for the target scenario: - custom `IoHandle` usage is relatively uncommon - collisions are expected to be rare - resizes should therefore also be uncommon - for non-network io_uring operations, SQEs usually have a short pending lifetime That makes a simple array-backed per-SQE tracking scheme a good fit here: it keeps the common case straightforward and avoids introducing extra hot-path cost for more general but heavier data structures. `CustomIoHandleBenchmark` on the current branch and 4.2 base Fast path vs baseline | pendingOpsDepth | baseline fast | current fast | delta | | --- | ---: | ---: | ---: | | 4096 | 1,023,617 ops/s | 1,024,338 ops/s | +0.07% | | 65536 | 974,757 ops/s | 970,427 ops/s | -0.44% | Slow path vs current fast path | pendingOpsDepth | fast path | slow path | delta | | --- | ---: | ---: | ---: | | 4096 | 1,024,338 ops/s | 944,886 ops/s | -7.76% | | 65536 | 970,427 ops/s | 886,176 ops/s | -8.68% | These numbers are in the expected range for the added slow-path bookkeeping, while keeping the existing short-value fast path intact. https://gist.github.com/dreamlike-ocean/05e7e272e0e6a9f45f40192229c938dc fix #16634 --------- Co-authored-by: Mengyang Li <56702218+dreamlike-ocean@users.noreply.github.com> Co-authored-by: Chris Vest <christianvest_hansen@apple.com>

…ip ci] Bumps `netty.version` from 4.2.13.Final to 4.2.14.Final. Updates `io.netty:netty-transport` from 4.2.13.Final to 4.2.14.Final Release notes *Sourced from [io.netty:netty-transport's releases](https://github.com/netty/netty/releases).* > netty-4.2.14.Final > ------------------ > > What's Changed > -------------- > > * HTTP: Fix revapi failure introduced by 84530fa81e12dcd1d42310bb20c1385cb44128d8 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16748](https://redirect.github.com/netty/netty/pull/16748) > * HTTP: Re-add constructor to HttpProxyHandler that was removed by mistake by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16747](https://redirect.github.com/netty/netty/pull/16747) > * Marshalling: Explicit document security requirements by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16752](https://redirect.github.com/netty/netty/pull/16752) > * Fix io\_uring op completion TRACE logging by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16755](https://redirect.github.com/netty/netty/pull/16755) > * Quic: Ensure writes are done before notify close promise of QuicheQui… by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16758](https://redirect.github.com/netty/netty/pull/16758) > * Avoid re-parsing openssl key material with non-cached provider by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16759](https://redirect.github.com/netty/netty/pull/16759) > * Pin HTTP/RTSP version + method normalization to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16765](https://redirect.github.com/netty/netty/pull/16765) > * Fill MsgHdrMemoryArray#hdrs with null entry on release by [`@tsegismont`](https://github.com/tsegismont) in [netty/netty#16764](https://redirect.github.com/netty/netty/pull/16764) > * Revapi: Use default "oldVersion" by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16774](https://redirect.github.com/netty/netty/pull/16774) > * Adaptive: Fix concurrency issue in adaptive allocator by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16767](https://redirect.github.com/netty/netty/pull/16767) > * Auto-port 4.2: Make bulk byte moving in ByteBuf faster by [`@netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16781](https://redirect.github.com/netty/netty/pull/16781) > * Pin multipart Content-Type / Content-Transfer-Encoding case folding to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16768](https://redirect.github.com/netty/netty/pull/16768) > * Remove dead native declarations by [`@pandareen`](https://github.com/pandareen) in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * Isolate tests that modify available Security providers by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16793](https://redirect.github.com/netty/netty/pull/16793) > * Remove test annotations from a method that isn't a test by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16792](https://redirect.github.com/netty/netty/pull/16792) > * Enable OpenSslCachingKeyMaterialProvider to evict stale entries after cert rotation by [`@zhangweikop`](https://github.com/zhangweikop) in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * IoUring: extend user data from short to long by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16682](https://redirect.github.com/netty/netty/pull/16682) > * Revert CompositeByteBuf component search fast path by [`@yawkat`](https://github.com/yawkat) in [netty/netty#16811](https://redirect.github.com/netty/netty/pull/16811) > * HTTP2: Use 100 as default max concurrent streams setting by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16804](https://redirect.github.com/netty/netty/pull/16804) > * Fix ResumptionController wrapping by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16815](https://redirect.github.com/netty/netty/pull/16815) > * Resolve all localhost addresses without querying DNS servers by [`@JulianVennen`](https://github.com/JulianVennen) in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules are configured but remote peer is using ipv4 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16803](https://redirect.github.com/netty/netty/pull/16803) > * Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16788](https://redirect.github.com/netty/netty/pull/16788) > * Route synchronous onLookupComplete exceptions via fireExceptionCaught by [`@kwondh5217`](https://github.com/kwondh5217) in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * IoUring: Stop generic FileRegion drain loop when transferred() reaches count() by [`@LuciferYang`](https://github.com/LuciferYang) in [netty/netty#16826](https://redirect.github.com/netty/netty/pull/16826) > * MQTT: Allow MQTT 5 CONNECT with password only by [`@shblue21`](https://github.com/shblue21) in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > * Fix MQTT decoder size check after variable header replay by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16787](https://redirect.github.com/netty/netty/pull/16787) > > New Contributors > ---------------- > > * [`@pandareen`](https://github.com/pandareen) made their first contribution in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * [`@zhangweikop`](https://github.com/zhangweikop) made their first contribution in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * [`@JulianVennen`](https://github.com/JulianVennen) made their first contribution in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * [`@kwondh5217`](https://github.com/kwondh5217) made their first contribution in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * [`@shblue21`](https://github.com/shblue21) made their first contribution in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > > **Full Changelog**: <netty/netty@netty-4.2.13.Final...netty-4.2.14.Final> Commits * [`0a60b75`](netty/netty@0a60b75) [maven-release-plugin] prepare release netty-4.2.14.Final * [`72df658`](netty/netty@72df658) Fix MQTT decoder size check after variable header replay ([#16787](https://redirect.github.com/netty/netty/issues/16787)) * [`7125dba`](netty/netty@7125dba) MQTT: Allow MQTT 5 CONNECT with password only ([#16833](https://redirect.github.com/netty/netty/issues/16833)) * [`9e19320`](netty/netty@9e19320) IoUring: Stop generic FileRegion drain loop when transferred() reaches count(... * [`4ce9f17`](netty/netty@4ce9f17) Route synchronous onLookupComplete exceptions via fireExceptionCaught ([#16794](https://redirect.github.com/netty/netty/issues/16794)) * [`f7b1b7d`](netty/netty@f7b1b7d) Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe... * [`0ccb265`](netty/netty@0ccb265) IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules ... * [`a6aeb6d`](netty/netty@a6aeb6d) Resolve all localhost addresses without querying DNS servers ([#16749](https://redirect.github.com/netty/netty/issues/16749)) * [`c328ba2`](netty/netty@c328ba2) Fix ResumptionController wrapping ([#16815](https://redirect.github.com/netty/netty/issues/16815)) * [`bc5862b`](netty/netty@bc5862b) HTTP2: Use 100 as default max concurrent streams setting ([#16804](https://redirect.github.com/netty/netty/issues/16804)) * Additional commits viewable in [compare view](netty/netty@netty-4.2.13.Final...netty-4.2.14.Final) Updates `io.netty:netty-codec` from 4.2.13.Final to 4.2.14.Final Release notes *Sourced from [io.netty:netty-codec's releases](https://github.com/netty/netty/releases).* > netty-4.2.14.Final > ------------------ > > What's Changed > -------------- > > * HTTP: Fix revapi failure introduced by 84530fa81e12dcd1d42310bb20c1385cb44128d8 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16748](https://redirect.github.com/netty/netty/pull/16748) > * HTTP: Re-add constructor to HttpProxyHandler that was removed by mistake by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16747](https://redirect.github.com/netty/netty/pull/16747) > * Marshalling: Explicit document security requirements by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16752](https://redirect.github.com/netty/netty/pull/16752) > * Fix io\_uring op completion TRACE logging by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16755](https://redirect.github.com/netty/netty/pull/16755) > * Quic: Ensure writes are done before notify close promise of QuicheQui… by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16758](https://redirect.github.com/netty/netty/pull/16758) > * Avoid re-parsing openssl key material with non-cached provider by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16759](https://redirect.github.com/netty/netty/pull/16759) > * Pin HTTP/RTSP version + method normalization to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16765](https://redirect.github.com/netty/netty/pull/16765) > * Fill MsgHdrMemoryArray#hdrs with null entry on release by [`@tsegismont`](https://github.com/tsegismont) in [netty/netty#16764](https://redirect.github.com/netty/netty/pull/16764) > * Revapi: Use default "oldVersion" by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16774](https://redirect.github.com/netty/netty/pull/16774) > * Adaptive: Fix concurrency issue in adaptive allocator by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16767](https://redirect.github.com/netty/netty/pull/16767) > * Auto-port 4.2: Make bulk byte moving in ByteBuf faster by [`@netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16781](https://redirect.github.com/netty/netty/pull/16781) > * Pin multipart Content-Type / Content-Transfer-Encoding case folding to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16768](https://redirect.github.com/netty/netty/pull/16768) > * Remove dead native declarations by [`@pandareen`](https://github.com/pandareen) in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * Isolate tests that modify available Security providers by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16793](https://redirect.github.com/netty/netty/pull/16793) > * Remove test annotations from a method that isn't a test by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16792](https://redirect.github.com/netty/netty/pull/16792) > * Enable OpenSslCachingKeyMaterialProvider to evict stale entries after cert rotation by [`@zhangweikop`](https://github.com/zhangweikop) in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * IoUring: extend user data from short to long by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16682](https://redirect.github.com/netty/netty/pull/16682) > * Revert CompositeByteBuf component search fast path by [`@yawkat`](https://github.com/yawkat) in [netty/netty#16811](https://redirect.github.com/netty/netty/pull/16811) > * HTTP2: Use 100 as default max concurrent streams setting by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16804](https://redirect.github.com/netty/netty/pull/16804) > * Fix ResumptionController wrapping by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16815](https://redirect.github.com/netty/netty/pull/16815) > * Resolve all localhost addresses without querying DNS servers by [`@JulianVennen`](https://github.com/JulianVennen) in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules are configured but remote peer is using ipv4 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16803](https://redirect.github.com/netty/netty/pull/16803) > * Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16788](https://redirect.github.com/netty/netty/pull/16788) > * Route synchronous onLookupComplete exceptions via fireExceptionCaught by [`@kwondh5217`](https://github.com/kwondh5217) in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * IoUring: Stop generic FileRegion drain loop when transferred() reaches count() by [`@LuciferYang`](https://github.com/LuciferYang) in [netty/netty#16826](https://redirect.github.com/netty/netty/pull/16826) > * MQTT: Allow MQTT 5 CONNECT with password only by [`@shblue21`](https://github.com/shblue21) in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > * Fix MQTT decoder size check after variable header replay by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16787](https://redirect.github.com/netty/netty/pull/16787) > > New Contributors > ---------------- > > * [`@pandareen`](https://github.com/pandareen) made their first contribution in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * [`@zhangweikop`](https://github.com/zhangweikop) made their first contribution in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * [`@JulianVennen`](https://github.com/JulianVennen) made their first contribution in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * [`@kwondh5217`](https://github.com/kwondh5217) made their first contribution in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * [`@shblue21`](https://github.com/shblue21) made their first contribution in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > > **Full Changelog**: <netty/netty@netty-4.2.13.Final...netty-4.2.14.Final> Commits * [`0a60b75`](netty/netty@0a60b75) [maven-release-plugin] prepare release netty-4.2.14.Final * [`72df658`](netty/netty@72df658) Fix MQTT decoder size check after variable header replay ([#16787](https://redirect.github.com/netty/netty/issues/16787)) * [`7125dba`](netty/netty@7125dba) MQTT: Allow MQTT 5 CONNECT with password only ([#16833](https://redirect.github.com/netty/netty/issues/16833)) * [`9e19320`](netty/netty@9e19320) IoUring: Stop generic FileRegion drain loop when transferred() reaches count(... * [`4ce9f17`](netty/netty@4ce9f17) Route synchronous onLookupComplete exceptions via fireExceptionCaught ([#16794](https://redirect.github.com/netty/netty/issues/16794)) * [`f7b1b7d`](netty/netty@f7b1b7d) Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe... * [`0ccb265`](netty/netty@0ccb265) IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules ... * [`a6aeb6d`](netty/netty@a6aeb6d) Resolve all localhost addresses without querying DNS servers ([#16749](https://redirect.github.com/netty/netty/issues/16749)) * [`c328ba2`](netty/netty@c328ba2) Fix ResumptionController wrapping ([#16815](https://redirect.github.com/netty/netty/issues/16815)) * [`bc5862b`](netty/netty@bc5862b) HTTP2: Use 100 as default max concurrent streams setting ([#16804](https://redirect.github.com/netty/netty/issues/16804)) * Additional commits viewable in [compare view](netty/netty@netty-4.2.13.Final...netty-4.2.14.Final) Updates `io.netty:netty-handler` from 4.2.13.Final to 4.2.14.Final Release notes *Sourced from [io.netty:netty-handler's releases](https://github.com/netty/netty/releases).* > netty-4.2.14.Final > ------------------ > > What's Changed > -------------- > > * HTTP: Fix revapi failure introduced by 84530fa81e12dcd1d42310bb20c1385cb44128d8 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16748](https://redirect.github.com/netty/netty/pull/16748) > * HTTP: Re-add constructor to HttpProxyHandler that was removed by mistake by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16747](https://redirect.github.com/netty/netty/pull/16747) > * Marshalling: Explicit document security requirements by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16752](https://redirect.github.com/netty/netty/pull/16752) > * Fix io\_uring op completion TRACE logging by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16755](https://redirect.github.com/netty/netty/pull/16755) > * Quic: Ensure writes are done before notify close promise of QuicheQui… by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16758](https://redirect.github.com/netty/netty/pull/16758) > * Avoid re-parsing openssl key material with non-cached provider by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16759](https://redirect.github.com/netty/netty/pull/16759) > * Pin HTTP/RTSP version + method normalization to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16765](https://redirect.github.com/netty/netty/pull/16765) > * Fill MsgHdrMemoryArray#hdrs with null entry on release by [`@tsegismont`](https://github.com/tsegismont) in [netty/netty#16764](https://redirect.github.com/netty/netty/pull/16764) > * Revapi: Use default "oldVersion" by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16774](https://redirect.github.com/netty/netty/pull/16774) > * Adaptive: Fix concurrency issue in adaptive allocator by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16767](https://redirect.github.com/netty/netty/pull/16767) > * Auto-port 4.2: Make bulk byte moving in ByteBuf faster by [`@netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16781](https://redirect.github.com/netty/netty/pull/16781) > * Pin multipart Content-Type / Content-Transfer-Encoding case folding to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16768](https://redirect.github.com/netty/netty/pull/16768) > * Remove dead native declarations by [`@pandareen`](https://github.com/pandareen) in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * Isolate tests that modify available Security providers by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16793](https://redirect.github.com/netty/netty/pull/16793) > * Remove test annotations from a method that isn't a test by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16792](https://redirect.github.com/netty/netty/pull/16792) > * Enable OpenSslCachingKeyMaterialProvider to evict stale entries after cert rotation by [`@zhangweikop`](https://github.com/zhangweikop) in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * IoUring: extend user data from short to long by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16682](https://redirect.github.com/netty/netty/pull/16682) > * Revert CompositeByteBuf component search fast path by [`@yawkat`](https://github.com/yawkat) in [netty/netty#16811](https://redirect.github.com/netty/netty/pull/16811) > * HTTP2: Use 100 as default max concurrent streams setting by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16804](https://redirect.github.com/netty/netty/pull/16804) > * Fix ResumptionController wrapping by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16815](https://redirect.github.com/netty/netty/pull/16815) > * Resolve all localhost addresses without querying DNS servers by [`@JulianVennen`](https://github.com/JulianVennen) in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules are configured but remote peer is using ipv4 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16803](https://redirect.github.com/netty/netty/pull/16803) > * Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16788](https://redirect.github.com/netty/netty/pull/16788) > * Route synchronous onLookupComplete exceptions via fireExceptionCaught by [`@kwondh5217`](https://github.com/kwondh5217) in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * IoUring: Stop generic FileRegion drain loop when transferred() reaches count() by [`@LuciferYang`](https://github.com/LuciferYang) in [netty/netty#16826](https://redirect.github.com/netty/netty/pull/16826) > * MQTT: Allow MQTT 5 CONNECT with password only by [`@shblue21`](https://github.com/shblue21) in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > * Fix MQTT decoder size check after variable header replay by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16787](https://redirect.github.com/netty/netty/pull/16787) > > New Contributors > ---------------- > > * [`@pandareen`](https://github.com/pandareen) made their first contribution in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * [`@zhangweikop`](https://github.com/zhangweikop) made their first contribution in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * [`@JulianVennen`](https://github.com/JulianVennen) made their first contribution in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * [`@kwondh5217`](https://github.com/kwondh5217) made their first contribution in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * [`@shblue21`](https://github.com/shblue21) made their first contribution in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > > **Full Changelog**: <netty/netty@netty-4.2.13.Final...netty-4.2.14.Final> Commits * [`0a60b75`](netty/netty@0a60b75) [maven-release-plugin] prepare release netty-4.2.14.Final * [`72df658`](netty/netty@72df658) Fix MQTT decoder size check after variable header replay ([#16787](https://redirect.github.com/netty/netty/issues/16787)) * [`7125dba`](netty/netty@7125dba) MQTT: Allow MQTT 5 CONNECT with password only ([#16833](https://redirect.github.com/netty/netty/issues/16833)) * [`9e19320`](netty/netty@9e19320) IoUring: Stop generic FileRegion drain loop when transferred() reaches count(... * [`4ce9f17`](netty/netty@4ce9f17) Route synchronous onLookupComplete exceptions via fireExceptionCaught ([#16794](https://redirect.github.com/netty/netty/issues/16794)) * [`f7b1b7d`](netty/netty@f7b1b7d) Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe... * [`0ccb265`](netty/netty@0ccb265) IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules ... * [`a6aeb6d`](netty/netty@a6aeb6d) Resolve all localhost addresses without querying DNS servers ([#16749](https://redirect.github.com/netty/netty/issues/16749)) * [`c328ba2`](netty/netty@c328ba2) Fix ResumptionController wrapping ([#16815](https://redirect.github.com/netty/netty/issues/16815)) * [`bc5862b`](netty/netty@bc5862b) HTTP2: Use 100 as default max concurrent streams setting ([#16804](https://redirect.github.com/netty/netty/issues/16804)) * Additional commits viewable in [compare view](netty/netty@netty-4.2.13.Final...netty-4.2.14.Final) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- Dependabot commands and options You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

…l [skip ci] Bumps [io.netty:netty-all](https://github.com/netty/netty) from 4.2.13.Final to 4.2.14.Final. Release notes *Sourced from [io.netty:netty-all's releases](https://github.com/netty/netty/releases).* > netty-4.2.14.Final > ------------------ > > What's Changed > -------------- > > * HTTP: Fix revapi failure introduced by 84530fa81e12dcd1d42310bb20c1385cb44128d8 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16748](https://redirect.github.com/netty/netty/pull/16748) > * HTTP: Re-add constructor to HttpProxyHandler that was removed by mistake by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16747](https://redirect.github.com/netty/netty/pull/16747) > * Marshalling: Explicit document security requirements by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16752](https://redirect.github.com/netty/netty/pull/16752) > * Fix io\_uring op completion TRACE logging by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16755](https://redirect.github.com/netty/netty/pull/16755) > * Quic: Ensure writes are done before notify close promise of QuicheQui… by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16758](https://redirect.github.com/netty/netty/pull/16758) > * Avoid re-parsing openssl key material with non-cached provider by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16759](https://redirect.github.com/netty/netty/pull/16759) > * Pin HTTP/RTSP version + method normalization to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16765](https://redirect.github.com/netty/netty/pull/16765) > * Fill MsgHdrMemoryArray#hdrs with null entry on release by [`@tsegismont`](https://github.com/tsegismont) in [netty/netty#16764](https://redirect.github.com/netty/netty/pull/16764) > * Revapi: Use default "oldVersion" by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16774](https://redirect.github.com/netty/netty/pull/16774) > * Adaptive: Fix concurrency issue in adaptive allocator by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16767](https://redirect.github.com/netty/netty/pull/16767) > * Auto-port 4.2: Make bulk byte moving in ByteBuf faster by [`@netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16781](https://redirect.github.com/netty/netty/pull/16781) > * Pin multipart Content-Type / Content-Transfer-Encoding case folding to Locale.US by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16768](https://redirect.github.com/netty/netty/pull/16768) > * Remove dead native declarations by [`@pandareen`](https://github.com/pandareen) in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * Isolate tests that modify available Security providers by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16793](https://redirect.github.com/netty/netty/pull/16793) > * Remove test annotations from a method that isn't a test by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16792](https://redirect.github.com/netty/netty/pull/16792) > * Enable OpenSslCachingKeyMaterialProvider to evict stale entries after cert rotation by [`@zhangweikop`](https://github.com/zhangweikop) in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * IoUring: extend user data from short to long by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16682](https://redirect.github.com/netty/netty/pull/16682) > * Revert CompositeByteBuf component search fast path by [`@yawkat`](https://github.com/yawkat) in [netty/netty#16811](https://redirect.github.com/netty/netty/pull/16811) > * HTTP2: Use 100 as default max concurrent streams setting by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16804](https://redirect.github.com/netty/netty/pull/16804) > * Fix ResumptionController wrapping by [`@chrisvest`](https://github.com/chrisvest) in [netty/netty#16815](https://redirect.github.com/netty/netty/pull/16815) > * Resolve all localhost addresses without querying DNS servers by [`@JulianVennen`](https://github.com/JulianVennen) in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules are configured but remote peer is using ipv4 by [`@normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16803](https://redirect.github.com/netty/netty/pull/16803) > * Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe by [`@dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16788](https://redirect.github.com/netty/netty/pull/16788) > * Route synchronous onLookupComplete exceptions via fireExceptionCaught by [`@kwondh5217`](https://github.com/kwondh5217) in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * IoUring: Stop generic FileRegion drain loop when transferred() reaches count() by [`@LuciferYang`](https://github.com/LuciferYang) in [netty/netty#16826](https://redirect.github.com/netty/netty/pull/16826) > * MQTT: Allow MQTT 5 CONNECT with password only by [`@shblue21`](https://github.com/shblue21) in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > * Fix MQTT decoder size check after variable header replay by [`@daguimu`](https://github.com/daguimu) in [netty/netty#16787](https://redirect.github.com/netty/netty/pull/16787) > > New Contributors > ---------------- > > * [`@pandareen`](https://github.com/pandareen) made their first contribution in [netty/netty#16783](https://redirect.github.com/netty/netty/pull/16783) > * [`@zhangweikop`](https://github.com/zhangweikop) made their first contribution in [netty/netty#16523](https://redirect.github.com/netty/netty/pull/16523) > * [`@JulianVennen`](https://github.com/JulianVennen) made their first contribution in [netty/netty#16749](https://redirect.github.com/netty/netty/pull/16749) > * [`@kwondh5217`](https://github.com/kwondh5217) made their first contribution in [netty/netty#16794](https://redirect.github.com/netty/netty/pull/16794) > * [`@shblue21`](https://github.com/shblue21) made their first contribution in [netty/netty#16833](https://redirect.github.com/netty/netty/pull/16833) > > **Full Changelog**: <netty/netty@netty-4.2.13.Final...netty-4.2.14.Final> Commits * [`0a60b75`](netty/netty@0a60b75) [maven-release-plugin] prepare release netty-4.2.14.Final * [`72df658`](netty/netty@72df658) Fix MQTT decoder size check after variable header replay ([#16787](https://redirect.github.com/netty/netty/issues/16787)) * [`7125dba`](netty/netty@7125dba) MQTT: Allow MQTT 5 CONNECT with password only ([#16833](https://redirect.github.com/netty/netty/issues/16833)) * [`9e19320`](netty/netty@9e19320) IoUring: Stop generic FileRegion drain loop when transferred() reaches count(... * [`4ce9f17`](netty/netty@4ce9f17) Route synchronous onLookupComplete exceptions via fireExceptionCaught ([#16794](https://redirect.github.com/netty/netty/issues/16794)) * [`f7b1b7d`](netty/netty@f7b1b7d) Fix memoryAddress() for direct ByteBuffers wrapped by Unpooled without Unsafe... * [`0ccb265`](netty/netty@0ccb265) IpFilter: Fix ClassCastException caused by IpSubnetFilter if only ipv6 rules ... * [`a6aeb6d`](netty/netty@a6aeb6d) Resolve all localhost addresses without querying DNS servers ([#16749](https://redirect.github.com/netty/netty/issues/16749)) * [`c328ba2`](netty/netty@c328ba2) Fix ResumptionController wrapping ([#16815](https://redirect.github.com/netty/netty/issues/16815)) * [`bc5862b`](netty/netty@bc5862b) HTTP2: Use 100 as default max concurrent streams setting ([#16804](https://redirect.github.com/netty/netty/issues/16804)) * Additional commits viewable in [compare view](netty/netty@netty-4.2.13.Final...netty-4.2.14.Final) [![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility\_score?dependency-name=io.netty:netty-all&package-manager=maven&previous-version=4.2.13.Final&new-version=4.2.14.Final)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- Dependabot commands and options You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

dreamlike-ocean added 13 commits April 11, 2026 10:12

extend userData to long

5c56840

track registrations via intrusive list for shutdown

614396c

restore IoUringIoOps public constructor compatibility while adding lo…

5905cbb

…ng userData support

keep a fast path for short userData and use a sequence table slow pat…

6c926a3

…h for custom IoHandle long userData

add ut and more comment

e184481

slow-path completions through the live registration table to align wi…

7393c79

…th the fast path.

remove doubled linkedlist

9280078

Extract PendingOpSlots and split slow-path token generation between e…

71f7822

…vent-loop and off-loop submissions

Merge remote-tracking branch 'origin/extend_udata' into extend_udata

2daadc1

Revert "Extract PendingOpSlots and split slow-path token generation b…

f41fc0e

…etween event-loop and off-loop submissions" This reverts commit 71f7822.

remove Deprecated

0d5f0cf

Merge remote-tracking branch 'netty/4.2' into extend_udata

280e621

fix wrong name

fac7d18

normanmaurer requested changes Apr 23, 2026

View reviewed changes

1. deprecate IoUringIoEvent.data()

d009fdb

2. release slow-path slot before dispatch 3. keep registration ids positive via wraparound

dreamlike-ocean force-pushed the extend_udata branch from e62bf09 to d009fdb Compare April 23, 2026 18:45

normanmaurer requested review from chrisvest and franz1981 April 24, 2026 08:39

normanmaurer added this to the 4.2.13.Final milestone Apr 24, 2026

normanmaurer approved these changes Apr 24, 2026

View reviewed changes

1 apply review comment

57135f5

dreamlike-ocean force-pushed the extend_udata branch from d1f6c2c to 57135f5 Compare April 24, 2026 16:10

normanmaurer approved these changes Apr 27, 2026

View reviewed changes

Zir0-93 mentioned this pull request Apr 30, 2026

fix: sanitize SVG output to remove invalid XML characters hadi-technology/striff-lib#46

Merged

2 tasks

normanmaurer added this to the 4.2.14.Final milestone May 5, 2026

dreamlike-ocean added 2 commits May 7, 2026 13:56

Merge remote-tracking branch 'netty/4.2' into extend_udata

266e5f7

# Conflicts: # transport-classes-io_uring/src/main/java/io/netty/channel/uring/IoUringIoHandler.java

apply 'Fix io_uring op completion TRACE logging'

eeb8978

dreamlike-ocean and others added 3 commits May 7, 2026 16:09

Merge branch '4.2' into extend_udata

d42904a

apply 'Fix incorrect assertion which was triggered when two Channels …

c8bcc7f

…on the same EventLoop did a gathering write”'

Merge remote-tracking branch 'origin/extend_udata' into extend_udata

4d76d61

chrisvest requested changes May 8, 2026

View reviewed changes

dreamlike-ocean added 2 commits May 10, 2026 00:38

Refactor io_uring slow-path token tracking to use a primitive open-ad…

fcda24e

…dressed map with negative tokens and tombstone reuse.

fix log

991de19

chrisvest reviewed May 11, 2026

View reviewed changes

Comment thread transport-classes-io_uring/src/main/java/io/netty/channel/uring/PendingOpMap.java Outdated

Comment thread transport-classes-io_uring/src/main/java/io/netty/channel/uring/PendingOpMap.java

1.Replace tail recursion with iteration

42c422b

2.add more ut

dreamlike-ocean requested review from chrisvest May 12, 2026 03:24

chrisvest approved these changes May 12, 2026

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chrisvest added the needs-cherry-pick-5.0 This PR should be cherry-picked to 5.0 once merged. label May 12, 2026

chrisvest approved these changes May 12, 2026

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chrisvest added 2 commits May 12, 2026 10:07

Merge branch '4.2' into extend_udata

1ee6b09

Move PendingOpMapTest to the native module

e69011d

All io_uring tests, except LoadClassTest, needs to be in the native module

chrisvest enabled auto-merge (squash) May 12, 2026 20:22

chrisvest merged commit 7f00b24 into netty:4.2 May 12, 2026
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netty-project-bot mentioned this pull request May 12, 2026

Auto-port 5.0: IoUring: extend user data from short to long #16806

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github-actions Bot removed the needs-cherry-pick-5.0 This PR should be cherry-picked to 5.0 once merged. label May 12, 2026

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