revert(relayer): potential deadlock #3036
Conversation
WalkthroughThe recent changes streamline the balance management and request handling in the relayer service. Key modifications include the removal of mutex locks associated with balance checks, simplifying the logic and improving performance. However, these adjustments raise potential concerns about concurrency issues, indicating a shift in synchronization mechanisms and possibly altering how balance-related functionality is handled overall. Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant QuoteRequestHandler
participant Relayer
Client->>QuoteRequestHandler: Submit Quote Request
QuoteRequestHandler->>QuoteRequestHandler: Handle Seen
QuoteRequestHandler->>Relayer: Commit Pending Balance
Relayer->>QuoteRequestHandler: Process Request
QuoteRequestHandler->>Client: Response
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PR Summary
This pull request reverts changes related to balance locking mechanisms in the RFQ relayer service, simplifying the code but potentially impacting concurrency control.
- Removed
commitPendingBalancefunction and associated locking inhandleSeenandhandleNotEnoughInventoryfunctions - Eliminated
balanceMtxfield fromRelayerandQuoteRequestHandlerstructs - Simplified balance checking process in
handleSeen, directly usingGetCommittableBalance - Removed
getBalanceMtxKeyfunction, indicating a change in balance-related synchronization - These changes may improve performance but could introduce potential thread safety issues
3 file(s) reviewed, 1 comment(s)
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| @@ -167,7 +165,6 @@ func NewRelayer(ctx context.Context, metricHandler metrics.Handler, cfg relconfi | |||
| apiClient: apiClient, | |||
| semaphore: semaphore.NewWeighted(maxConcurrentRequests), | |||
| handlerMtx: mapmutex.NewStringMapMutex(), | |||
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logic: balanceMtx initialization removed. Verify if balance synchronization is still properly handled.
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #3036 +/- ##
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- Coverage 23.38100% 23.37680% -0.00421%
===================================================
Files 644 644
Lines 50139 50148 +9
Branches 82 82
===================================================
Hits 11723 11723
- Misses 37255 37264 +9
Partials 1161 1161
Flags with carried forward coverage won't be shown. Click here to find out more. ☔ View full report in Codecov by Sentry. |
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Actionable comments posted: 0
Review details
Configuration used: .coderabbit.yaml
Review profile: CHILL
Files selected for processing (3)
- services/rfq/relayer/service/handlers.go (3 hunks)
- services/rfq/relayer/service/relayer.go (2 hunks)
- services/rfq/relayer/service/statushandler.go (2 hunks)
Additional comments not posted (8)
services/rfq/relayer/service/statushandler.go (3)
Line range hint
34-34: Review the removal ofbalanceMtx.The
balanceMtxfield has been removed from theQuoteRequestHandlerstruct. Ensure that balance synchronization is handled appropriately elsewhere to avoid concurrency issues.
Line range hint
61-61: Verify synchronization sufficiency withhandlerMtx.The
requestToHandlerfunction now initializesQuoteRequestHandlerwithoutbalanceMtx, relying onhandlerMtx. Ensure this is sufficient for all synchronization needs.
Line range hint
88-90: Ensure adequate locking withhandlerMtx.The
mutexMiddlewarefunction useshandlerMtxfor locking. Verify that this provides adequate synchronization for the operations performed.services/rfq/relayer/service/relayer.go (2)
64-64: Review the removal ofbalanceMtx.The
balanceMtxfield has been removed from theRelayerstruct. Ensure that balance synchronization is handled appropriately elsewhere to avoid concurrency issues.
Line range hint
119-119: Verify impact of removingbalanceMtxinitialization.The
NewRelayerfunction no longer initializesbalanceMtx. Ensure that this change does not affect functionality or introduce concurrency issues.Verification successful
Impact of Removing
balanceMtxInitialization VerifiedThe removal of
balanceMtxinitialization in theNewRelayerfunction was part of a commit that reverted a previous feature adding mutex on committable balance consumption. This indicates thatbalanceMtxwas used for synchronizing balance requests but has been intentionally removed, likely due to a design decision or because it was no longer needed.
- The commit history shows that
balanceMtxand its associated logic were completely removed, suggesting that the codebase has been refactored to function without it.- There are no remaining references to
balanceMtxin the current codebase, confirming its removal and the absence of dependency issues.Therefore, the removal of
balanceMtxdoes not negatively impact the current functionality or introduce concurrency issues. The code has been adjusted accordingly to operate without this mutex.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the impact of removing `balanceMtx` initialization in `NewRelayer`. # Test: Check for any dependencies on `balanceMtx` initialization that might affect functionality. rg --type go 'NewRelayer'Length of output: 3456
Script:
#!/bin/bash # Description: Search for references to `balanceMtx` in the codebase to assess its previous usage. # Find all occurrences of `balanceMtx` to understand its role and impact. rg --type go 'balanceMtx'Length of output: 25
Script:
#!/bin/bash # Description: Check the version control history for any recent changes related to `balanceMtx`. # Search the git log for any commits mentioning `balanceMtx`. git log -p -S 'balanceMtx'Length of output: 53648
services/rfq/relayer/service/handlers.go (3)
490-495: Verify safety of removing balance locking logic.The
handleNotEnoughInventoryfunction no longer uses balance locking logic. Ensure that this change does not introduce concurrency issues.
214-221: Verify safety of removing locking mechanisms.The
commitPendingBalancefunction no longer uses locking mechanisms. Ensure that this change does not introduce concurrency issues.
214-221: Verify safety of removing immediate balance commitment.The
handleSeenfunction no longer commits pending balances immediately. Ensure that this change does not introduce race conditions or other issues.Verification successful
Removal of Immediate Balance Commitment is Safe
The
handleSeenfunction's removal of immediate balance commitment is managed safely by the checks and processes inhandleCommitPending. The latter ensures that requests are only processed when conditions are met, reducing the risk of race conditions.
- The
handleCommitPendingfunction checks block confirmations and bridge status before updating request status and forwarding.- These mechanisms ensure that requests are handled safely and sequentially.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the safety of removing immediate balance commitment in `handleSeen`. # Test: Check for potential race conditions or issues introduced by this change. rg --type go 'handleSeen'Length of output: 565
Script:
#!/bin/bash # Search for the implementation of the `handleSeen` function to understand its logic. ast-grep --lang go --pattern 'func (q *QuoteRequestHandler) handleSeen($_, $_, $_) $_'Length of output: 7031
Script:
#!/bin/bash # Search for the implementation of the `handleCommitPending` function to verify its handling of requests. ast-grep --lang go --pattern 'func (q *QuoteRequestHandler) handleCommitPending($_, $_, $_) $_'Length of output: 4326
Description
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Additional context
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Metadata
Summary by CodeRabbit
New Features
Bug Fixes
Refactor
QuoteRequestHandlerandRelayerto eliminate balance-related fields and methods, indicating a shift in balance management strategy.Documentation