Fix RPC Webhook queue dropping #5163

WietseWind · 2024-10-24T06:39:30Z

Problem:

When using subscribe at admin RPC port to send webhooks for the transaction stream to a backend, on large(r) ledgers the endpoint was consistently receiving fewer HTTP POSTs with TX information than the amount of transactions in a ledger.

This resulted in some XamanWallet users, on larger ledgers, not always receiving their transaction push notifications.

Details

Admin command RPC Post to URL had a 32 queue length (hardcoded) resulting in dropping TX notifications.

As this is an admin-command only, I stripped out the entire queue length check. If admin, you should know what you are doing. If your endpoint can't efficiently handle the TPS, your problem.
Also: shorter TTL for outgoing RPC HTTP calls: was 10 minutes PER REQUEST, now is 30 seconds (still too long, but 10 minutes is a guaranteed shit show if the calls keep on hanging and stack up, especially since the 32 queue length for HTTP calls is now removed).

While dropping the queue length limit on sent WebHooks could be considered dangerous, it's guarded by admin-RPC port anyway:

rippled/src/xrpld/rpc/handlers/Subscribe.cpp

Line 51 in 63209c2

if (context.role != Role::ADMIN)

Finally:

Change timeout const to be less am 8000 biguous.

codecov · 2024-10-24T07:01:18Z

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.1%. Comparing base (a574ec6) to head (d9ce153).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #5163   +/-   ##
=======================================
  Coverage     78.1%   78.1%           
=======================================
  Files          795     795           
  Lines        68572   68568    -4     
  Branches      8285    8281    -4     
=======================================
+ Hits         53554   53559    +5     
+ Misses       15018   15009    -9

Files with missing lines	Coverage Δ
src/xrpld/net/detail/RPCCall.cpp	`94.3% <100.0%> (ø)`
src/xrpld/net/detail/RPCSub.cpp	`45.5% <ø> (+1.7%)`	⬆️

... and 4 files with indirect coverage changes

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src/xrpld/net/detail/RPCCall.cpp

src/xrpld/net/detail/RPCSub.cpp

godexsoft

Agree with @mvadari that the code comments should be removed. Also added a question.

godexsoft · 2024-12-16T15:26:43Z

src/xrpld/net/detail/RPCSub.cpp

@@ -78,12 +78,16 @@ class RPCSubImp : public RPCSub
    {
        std::lock_guard sl(mLock);

-        if (mDeque.size() >= eventQueueMax)


Unbound queues are often trouble. In this particular case, because it's protected by the ADMIN role, perhaps this is acceptable.

Yep exactly my thinking. It's an admin command. If -as an admin- you want to dump a ton in the queue, be our guest?

What about increasing eventQueueMax to a more reasonable number instead of removing this block?

@mvadari What is reasonable? Theoretically I'd want to subscribe to all transactions, and theoretically that's 1000? 1500? 2000? 3000? per ledger? Why would we limit that?

If you don't want that or don't have the resources to process it, don't subscribe to it on the admin command. If you do, why put a limit in place? And then what would be a reasonable limit?

It is an admin command. Don't do stupid things. If you're an admin, there are a million other things not to screw up. On an OS level. Service level. Security level. Making rippled send a lot of webhooks is the least of your worries.

Bump @WietseWind

This is still an issue imo. Let's at least agree why this is ok or address it in some way.

IMO, there is no reasonable limit given the ledger's potential growth. Assuming this is only relevant for admins, any potential issues are mitigated. It's not like anybody is going to be running this on a UNL validator.

I would like to see some analysis that shows that it's only relevant for admins.

Either way, ledgers are getting bigger, so a single hard-coded value ain't going to cut it. Another potential solution would be instead of a hard-coded eventQueueMax, we have a static eventQueueMax variable initialized to some reasonably large value, and a public static function that can set it. Any time something happens that might cause a large number of messages to be sent to subscribers (e.g. closing a ledger), call the setter with the number of expected messages (e.g. the ledger size). If the new value is larger, it will update eventQueueMax, and maybe add some hard-coded padding. That way the limit may grow crazy big as ledgers grow crazy big, but it will always be big enough, and the queue will not be unbound.

src/xrpld/net/detail/RPCCall.cpp

Remove comments

WietseWind · 2024-12-16T20:02:47Z

@mvadari comments removed.

ximinez

Looks good

When using subscribe at admin RPC port to send webhooks for the transaction stream to a backend, on large(r) ledgers the endpoint receives fewer HTTP POSTs with TX information than the amount of transactions in a ledger. This change removes the hardcoded queue length to avoid dropping TX notifications for the admin-only command. In addition, the per-request TTL for outgoing RPC HTTP calls has been reduced from 10 minutes to 30 seconds.

@mtrippled

* refactor: Remove unused and add missing includes (#5293) The codebase is filled with includes that are unused, and which thus can be removed. At the same time, the files often do not include all headers that contain the definitions used in those files. This change uses clang-format and clang-tidy to clean up the includes, with minor manual intervention to ensure the code compiles on all platforms. * refactor: Calculate numFeatures automatically (#5324) Requiring manual updates of numFeatures is an annoying manual process that is easily forgotten, and leads to frequent merge conflicts. This change takes advantage of the `XRPL_FEATURE` and `XRPL_FIX` macros, and adds a new `XRPL_RETIRE` macro to automatically set `numFeatures`. * refactor: Improve ordering of headers with clang-format (#5343) Removes all manual header groupings from source and header files by leveraging clang-format options. * Rename "deadlock" to "stall" in `LoadManager` (#5341) What the LoadManager class does is stall detection, which is not the same as deadlock detection. In the condition of severe CPU starvation, LoadManager will currently intentionally crash rippled reporting `LogicError: Deadlock detected`. This error message is misleading as the condition being detected is not a deadlock. This change fixes and refactors the code in response. * Adds hub.xrpl-commons.org as a new Bootstrap Cluster (#5263) * fix: Error message for ledger_entry rpc (#5344) Changes the error to `malformedAddress` for `permissioned_domain` in the `ledger_entry` rpc, when the account is not a string. This change makes it more clear to a user what is wrong with their request. * fix: Handle invalid marker parameter in grpc call (#5317) The `end_marker` is used to limit the range of ledger entries to fetch. If `end_marker` is less than `marker`, a crash can occur. This change adds an additional check. * fix: trust line RPC no ripple flag (#5345) The Trustline RPC `no_ripple` flag gets set depending on `lsfDefaultRipple` flag, which is not a flag of a trustline but of the account root. The `lsfDefaultRipple` flag does not provide any insight if this particular trust line has `lsfLowNoRipple` or `lsfHighNoRipple` flag set, so it should not be used here at all. This change simplifies the logic. * refactor: Updates Conan dependencies: RocksDB (#5335) Updates RocksDB to version 9.7.3, the latest version supported in Conan 1.x. A patch for 9.7.4 that fixes a memory leak is included. * fix: Remove null pointer deref, just do abort (#5338) This change removes the existing undefined behavior from `LogicError`, so we can be certain that there will be always a stacktrace. De-referencing a null pointer is an old trick to generate `SIGSEGV`, which would typically also create a stacktrace. However it is also an undefined behaviour and compilers can do something else. A more robust way to create a stacktrace while crashing the program is to use `std::abort`, which we have also used in this location for a long time. If we combine the two, we might not get the expected behaviour - namely, the nullpointer deref followed by `std::abort`, as handled in certain compiler versions may not immediately cause a crash. We have observed stacktrace being wiped instead, and thread put in indeterminate state, then stacktrace created without any useful information. * chore: Add PR number to payload (#5310) This PR adds one more payload field to the libXRPL compatibility check workflow - the PR number itself. * chore: Update link to ripple-binary-codec (#5355) The link to ripple-binary-codec's definitions.json appears to be outdated. The updated link is also documented here: https://xrpl.org/docs/references/protocol/binary-format#definitions-file * Prevent consensus from getting stuck in the establish phase (#5277) - Detects if the consensus process is "stalled". If it is, then we can declare a consensus and end successfully even if we do not have 80% agreement on our proposal. - "Stalled" is defined as: - We have a close time consensus - Each disputed transaction is individually stalled: - It has been in the final "stuck" 95% requirement for at least 2 (avMIN_ROUNDS) "inner rounds" of phaseEstablish, - and either all of the other trusted proposers or this validator, if proposing, have had the same vote(s) for at least 4 (avSTALLED_ROUNDS) "inner rounds", and at least 80% of the validators (including this one, if appropriate) agree about the vote (whether yes or no). - If we have been in the establish phase for more than 10x the previous consensus establish phase's time, then consensus is considered "expired", and we will leave the round, which sends a partial validation (indicating that the node is moving on without validating). Two restrictions avoid prematurely exiting, or having an extended exit in extreme situations. - The 10x time is clamped to be within a range of 15s (ledgerMAX_CONSENSUS) to 120s (ledgerABANDON_CONSENSUS). - If consensus has not had an opportunity to walk through all avalanche states (defined as not going through 8 "inner rounds" of phaseEstablish), then ConsensusState::Expired is treated as ConsensusState::No. - When enough nodes leave the round, any remaining nodes will see they've fallen behind, and move on, too, generally before hitting the timeout. Any validations or partial validations sent during this time will help the consensus process bring the nodes back together. * test: enable TxQ unit tests work with variable reference fee (#5118) In preparation for a potential reference fee change we would like to verify that fee change works as expected. The first step is to fix all unit tests to be able to work with different reference fee values. * test: enable unit tests to work with variable reference fee (#5145) Fix remaining unit tests to be able to process reference fee values other than 10. * Intrusive SHAMap smart pointers for efficient memory use and lock-free synchronization (#5152) The main goal of this optimisation is memory reduction in SHAMapTreeNodes by introducing intrusive pointers instead of standard std::shared_ptr and std::weak_ptr. * refactor: Move integration tests from 'examples/' into 'tests/' (#5367) This change moves `examples/example` into `tests/conan` to make it clear it is an integration test, and adjusts the `conan` CI job accordingly * test: enable compile time param to change reference fee value (#5159) Adds an extra CI pipeline to perform unit tests using different values for fees. * Fix undefined uint128_t type on Windows non-unity builds (#5377) As part of import optimization, a transitive include had been removed that defined `BOOST_COMP_MSVC` on Windows. In unity builds, this definition was pulled in, but in non-unity builds it was not - causing a compilation error. An inspection of the Boost code revealed that we can just gate the statements by `_MS_VER` instead. A `#pragma message` is added to verify that the statement is only printed on Windows builds. * fix: uint128 ambiguousness breaking macos unity build (#5386) * Fix to correct memory ordering for compare_exchange_weak and wait in the intrusive reference counting logic (#5381) This change addresses a memory ordering assertion failure observed on one of the Windows test machines during the IntrusiveShared_test suite. * fix: disable `channel_authorize` when `signing_support` is disabled (#5385) * fix: Use the build image from ghcr.io (#5390) The ci pipelines are constantly hitting Docker Hub's public rate limiting since increasing the number of jobs we're running. This change switches over to images hosted in GitHub's registry. * Remove UNREACHABLE from `NetworkOPsImp::processTrustedProposal` (#5387) It’s possible for this to happen legitimately if a set of peers, including a validator, are connected in a cycle, and the latency and message processing time between those peers is significantly less than the latency between the validator and the last peer. It’s unlikely in the real world, but obviously easy to simulate with Antithesis. * Instrument proposal, validation and transaction messages (#5348) Adds metric counters for the following P2P message types: * Untrusted proposal and validation messages * Duplicate proposal, validation and transaction messages * refactor(trivial): reorganize ledger entry tests and helper functions (#5376) This PR splits out `ledger_entry` tests into its own file (`LedgerEntry_test.cpp`) and alphabetizes the helper functions in `LedgerEntry.cpp`. These commits were split out of #5237 to make that PR a little more manageable, since these basic trivial changes are most of the diff. There is no code change, just moving code around. * fix: `fixPayChanV1` (#4717) This change introduces a new fix amendment (`fixPayChanV1`) that prevents the creation of new `PaymentChannelCreate` transaction with a `CancelAfter` time less than the current ledger time. It piggy backs off of fix1571. Once the amendment is activated, creating a new `PaymentChannel` will require that if you specify the `CancelAfter` time/value, that value must be greater than or equal to the current ledger time. Currently users can create a payment channel where the `CancelAfter` time is before the current ledger time. This results in the payment channel being immediately closed on the next PaymentChannel transaction. * Fix: admin RPC webhook queue limit removal and timeout reduction (#5163) When using subscribe at admin RPC port to send webhooks for the transaction stream to a backend, on large(r) ledgers the endpoint receives fewer HTTP POSTs with TX information than the amount of transactions in a ledger. This change removes the hardcoded queue length to avoid dropping TX notifications for the admin-only command. In addition, the per-request TTL for outgoing RPC HTTP calls has been reduced from 10 minutes to 30 seconds. * fix: Adds CTID to RPC tx and updates error (#4738) This change fixes a number of issues involved with CTID: * CTID is not present on all RPC tx transactions. * rpcWRONG_NETWORK is missing in the ErrorCodes.cpp * Temporary disable automatic triggering macOS pipeline (#5397) We temporarily disable running unit tests on macOS on the CI pipeline while we are investigating the delays. * refactor: Clean up test logging to make it easier to search (#5396) This PR replaces the word `failed` with `failure` in any test names and renames some test files to fix MSVC warnings, so that it is easier to search through the test output to find tests that failed. * chore: Run CI on PRs that are Ready or have the "DraftRunCI" label (#5400) - Avoids costly overhead for idle PRs where the CI results don't add any value. * fix: CTID to use correct ledger_index (#5408) * chore: Small clarification to lsfDefaultRipple comment (#5410) * fix: Replaces random endpoint resolution with sequential (#5365) This change addresses an issue where `rippled` attempts to connect to an IPv6 address, even when the local network lacks IPv6 support, resulting in a "Network is unreachable" error. The fix replaces the custom endpoint selection logic with `boost::async_connect`, which sequentially attempts to connect to available endpoints until one succeeds or all fail. * Improve transaction relay logic (#4985) Combines four related changes: 1. "Decrease `shouldRelay` limit to 30s." Pretty self-explanatory. Currently, the limit is 5 minutes, by which point the `HashRouter` entry could have expired, making this transaction look brand new (and thus causing it to be relayed back to peers which have sent it to us recently). 2. "Give a transaction more chances to be retried." Will put a transaction into `LedgerMaster`'s held transactions if the transaction gets a `ter`, `tel`, or `tef` result. Old behavior was just `ter`. * Additionally, to prevent a transaction from being repeatedly held indefinitely, it must meet some extra conditions. (Documented in a comment in the code.) 3. "Pop all transactions with sequential sequences, or tickets." When a transaction is processed successfully, currently, one held transaction for the same account (if any) will be popped out of the held transactions list, and queued up for the next transaction batch. This change pops all transactions for the account, but only if they have sequential sequences (for non-ticket transactions) or use a ticket. This issue was identified from interactions with @mtrippled's #4504, which was merged, but unfortunately reverted later by #4852. When the batches were spaced out, it could potentially take a very long time for a large number of held transactions for an account to get processed through. However, whether batched or not, this change will help get held transactions cleared out, particularly if a missing earlier transaction is what held them up. 4. "Process held transactions through existing NetworkOPs batching." In the current processing, at the end of each consensus round, all held transactions are directly applied to the open ledger, then the held list is reset. This bypasses all of the logic in `NetworkOPs::apply` which, among other things, broadcasts successful transactions to peers. This means that the transaction may not get broadcast to peers for a really long time (5 minutes in the current implementation, or 30 seconds with this first commit). If the node is a bottleneck (either due to network configuration, or because the transaction was submitted locally), the transaction may not be seen by any other nodes or validators before it expires or causes other problems. * Enable passive squelching (#5358) This change updates the squelching logic to accept squelch messages for untrusted validators. As a result, servers will also squelch untrusted validator messages reducing duplicate traffic they generate. In particular: * Updates squelch message handling logic to squelch messages for all validators, not only trusted ones. * Updates the logic to send squelch messages to peers that don't squelch themselves * Increases the threshold for the number of messages that a peer has to deliver to consider it as a candidate for validator messages. * Add PermissionDelegation feature (#5354) This change implements the account permission delegation described in XLS-75d, see XRPLF/XRPL-Standards#257. * Introduces transaction-level and granular permissions that can be delegated to other accounts. * Adds `DelegateSet` transaction to grant specified permissions to another account. * Adds `ltDelegate` ledger object to maintain the permission list for delegating/delegated account pair. * Adds an optional `Delegate` field in common fields, allowing a delegated account to send transactions on behalf of the delegating account within the granted permission scope. The `Account` field remains the delegating account; the `Delegate` field specifies the delegated account. The transaction is signed by the delegated account. * refactor: use east const convention (#5409) This change refactors the codebase to use the "east const convention", and adds a clang-format rule to follow this convention. * fix: enable LedgerStateFix for delegation (#5427) * Configure CODEOWNERS for changes to RPC code (#5266) To ensure changes to any RPC-related code are compatible with other services, such as Clio, the RPC team will be required to review them. * fix: Ensure that coverage file generation is atomic. (#5426) Running unit tests in parallel and multiple threads can write into one file can corrupt output files, and then gcovr won't be able to parse the corrupted file. This change adds -fprofile-update=atomic as instructed by https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68080. * fix: Update validators-example.txt fix xrplf example URL (#5384) * Fix: Resolve slow test on macOS pipeline (#5392) Using std::barrier performs extremely poorly (~1 hour vs ~1 minute to run the test suite) in certain macOS environments. To unblock our macOS CI pipeline, std::barrier has been replaced with a custom mutex-based barrier (Barrier) that significantly improves performance without compromising correctness. * Set version to 2.5.0-b1 --------- Co-authored-by: Bart <bthomee@users.noreply.github.com> Co-authored-by: Ed Hennis <ed@ripple.com> Co-authored-by: Bronek Kozicki <brok@incorrekt.com> Co-authored-by: Darius Tumas <Tokeiito@users.noreply.github.com> Co-authored-by: Sergey Kuznetsov <skuznetsov@ripple.com> Co-authored-by: cyan317 <120398799+cindyyan317@users.noreply.github.com> Co-authored-by: Vlad <129996061+vvysokikh1@users.noreply.github.com> Co-authored-by: Alex Kremer <akremer@ripple.com> Co-authored-by: Valentin Balaschenko <13349202+vlntb@users.noreply.github.com> Co-authored-by: Mayukha Vadari <mvadari@ripple.com> Co-authored-by: Vito Tumas <5780819+Tapanito@users.noreply.github.com> Co-authored-by: Denis Angell <dangell@transia.co> Co-authored-by: Wietse Wind <w.wind@ipublications.net> Co-authored-by: yinyiqian1 <yqian@ripple.com> Co-authored-by: Jingchen <a1q123456@users.noreply.github.com> Co-authored-by: brettmollin <brettmollin@users.noreply.github.com>

Fix RPC Webhook queue dropping

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mvadari reviewed Dec 12, 2024

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mvadari reviewed Dec 12, 2024

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godexsoft reviewed Dec 16, 2024

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WietseWind added 2 commits December 16, 2024 21:00

Remove comments

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Merge pull request #1 from WietseWind/fix/rpc-webhook-queue-rmcomment

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Merge branch 'develop' into fix/rpc-webhook-queue

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ximinez self-assigned this Mar 18, 2025

ximinez self-requested a review March 18, 2025 17:09

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bthomee requested review from mvadari and godexsoft March 18, 2025 23:49

Merge branch 'develop' into fix/rpc-webhook-queue

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mvadari approved these changes Apr 9, 2025

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bthomee added 2 commits April 9, 2025 20:17

Merge branch 'develop' into fix/rpc-webhook-queue

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Merge branch 'develop' into fix/rpc-webhook-queue

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bthomee enabled auto-merge (squash) April 10, 2025 05:38

bthomee merged commit aafd2d8 into XRPLF:develop Apr 10, 2025
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Proposed 2.5.0-rc2 #5491

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Release 2.5.0 #5501

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Set version to 2.5.0 #5502

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legleux mentioned this pull request Jun 23, 2025

Release 2.5.0 #5504

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Fix RPC Webhook queue dropping #5163

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Fix RPC Webhook queue dropping #5163

Fix RPC Webhook queue dropping #5163

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