[BUGFIX] add Health Check for Range over gRPC Connection Loop #2798
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📝 WalkthroughWalkthroughThe pull request introduces context-aware modifications to the gRPC client connection management in the Changes
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #2798 +/- ##
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- Coverage 23.93% 23.92% -0.01%
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Files 546 546
Lines 54555 54570 +15
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- Hits 13058 13057 -1
- Misses 40712 40729 +17
+ Partials 785 784 -1 ☔ View full report in Codecov by Sentry. |
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🧹 Nitpick comments (2)
internal/net/grpc/client.go (2)
1117-1130: Enhance error handling and logging in rangeConns.The connection management could be improved in several ways:
- The error messages could be more descriptive
- The health check logging could be structured
- The connection state transitions should be logged at debug level
Consider these improvements:
func (g *gRPCClient) rangeConns(ctx context.Context, fn func(addr string, p pool.Conn) bool) error { var cnt int g.conns.Range(func(addr string, p pool.Conn) bool { if p == nil || !p.IsHealthy(ctx) { pc, err := p.Connect(ctx) if pc == nil || err != nil || !pc.IsHealthy(ctx) { if pc != nil { pc.Disconnect() } - log.Debugf("Unhealthy connection detected for %s during gRPC Connection Range over Loop:\t%s", addr, p.String()) + log.WithFields(log.Fields{ + "addr": addr, + "error": err, + "connection": p.String(), + }).Debug("Unhealthy connection detected during gRPC connection range") return true } p = pc + log.WithFields(log.Fields{ + "addr": addr, + }).Debug("Successfully reconnected during gRPC connection range") } cnt++ return fn(addr, p) }) if cnt == 0 { - return errors.ErrGRPCClientConnNotFound("*") + return errors.ErrGRPCClientConnNotFound("no healthy connections available") } return nil }🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 1117-1117: internal/net/grpc/client.go#L1117
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Line range hint
1-1130: Consider architectural improvements for connection management.While the health check implementation improves reliability, consider these architectural enhancements:
- Implement a connection state machine to manage transitions more reliably
- Add metrics for connection health and reconnection attempts
- Consider implementing circuit breakers at the connection pool level
These changes would improve:
- Reliability: Clear connection state transitions
- Observability: Better monitoring of connection health
- Resilience: Faster failure detection and recovery
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 1117-1117: internal/net/grpc/client.go#L1117
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📒 Files selected for processing (1)
internal/net/grpc/client.go(9 hunks)
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internal/net/grpc/client.go
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🔇 Additional comments (3)
internal/net/grpc/client.go (3)
Line range hint
252-289: Add test coverage for connection monitoring.The connection monitoring logic for both pool rebalancing and health checks lacks test coverage. This is critical functionality that should be thoroughly tested.
Would you like me to help generate comprehensive test cases for:
- Pool rebalancing with various connection states
- Health check reconnection scenarios
- Error handling paths
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 252-252: internal/net/grpc/client.go#L252
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1090-1092: Add test coverage for ConnectedAddrs.The ConnectedAddrs method lacks test coverage. This is important functionality for connection management and monitoring.
Would you like me to help generate test cases covering:
- Empty connection pool
- Mixed healthy/unhealthy connections
- Connection state transitions during enumeration
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 1090-1092: internal/net/grpc/client.go#L1090-L1092
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Line range hint
418-704: Add test coverage and consider potential race conditions.The range operations lack test coverage. Additionally, there's a potential race condition in connection health checks where
IsHealthyis called before using the connection, but the connection state could change between these calls.Consider using a connection state lock or implementing a transactional health check. Example approach:
- if p != nil && p.IsHealthy(ctx) { + if p != nil { + if err := p.CheckHealth(ctx); err == nil { // use connection + } + }Would you like me to help generate test cases covering:
- Concurrent range operations
- Connection state transitions
- Error handling scenarios
🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 481-481: internal/net/grpc/client.go#L481
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Actionable comments posted: 2
🔭 Outside diff range comments (2)
internal/net/grpc/client.go (2)
Test coverage needed for OrderedRange operations
The review comment is valid. The test file shows test templates exist but are not implemented for OrderedRange operations. Critical paths including health checks and error handling need test coverage.
Test_gRPCClient_OrderedRange: Template exists but needs implementationTest_gRPCClient_OrderedRangeConcurrent: Template exists but needs implementation🔗 Analysis chain
Line range hint
568-637: Add test coverage for OrderedRange operations.The OrderedRange and OrderedRangeConcurrent implementations include proper health checks and error handling. However, these critical paths lack test coverage.
Run the following script to check existing test patterns:
Would you like me to help generate test cases for the OrderedRange operations?
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check existing test patterns for OrderedRange operations # Look for similar test patterns that we can follow rg -A 5 "TestOrderedRange|TestOrderedRangeConcurrent" --type goLength of output: 65
Script:
#!/bin/bash # Find test files in the same package directory and check their content fd "client_test.go" internal/net/grpc/ --type f --exec cat {} # Search for any test cases related to gRPC client operations rg -B 2 -A 5 "func Test.*Client" internal/net/grpc/ --type goLength of output: 65663
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[warning] 568-568: internal/net/grpc/client.go#L568
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Test coverage is indeed missing for Range operations
The review comment is correct. While test stubs exist in
internal/net/grpc/client_test.gofor bothRangeandRangeConcurrentoperations, they are commented out and contain only type definitions without actual test cases or assertions. These stubs can serve as templates for implementing the required test coverage.
Test_gRPCClient_Range: Only contains type definitions, no test implementationTest_gRPCClient_RangeConcurrent: Only contains type definitions, no test implementationThe existing stubs provide a good foundation for implementing comprehensive test coverage, as they already define the necessary parameter and field types.
🔗 Analysis chain
Line range hint
418-481: Add test coverage for Range operations.The Range and RangeConcurrent implementations properly handle context propagation and include comprehensive tracing. However, these critical paths lack test coverage.
Run the following script to check existing test patterns:
Would you like me to help generate test cases for the Range operations?
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check existing test patterns for Range operations # Look for similar test patterns that we can follow rg -A 5 "TestRange|TestRangeConcurrent" --type goLength of output: 51
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#!/bin/bash # Search for test files in the grpc package directory fd ".*_test.go" internal/net/grpc/ # Look for any client-related test functions rg "func Test.*Client" internal/net/grpc/ --type go -A 5 # Check if there are any existing tests that call Range or RangeConcurrent rg "Range\(|RangeConcurrent\(" internal/net/grpc/ --type goLength of output: 11893
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#!/bin/bash # Check the actual content of the Range-related tests cat internal/net/grpc/client_test.go | grep -A 30 "func Test_gRPCClient_Range" cat internal/net/grpc/client_test.go | grep -A 30 "func Test_gRPCClient_RangeConcurrent"Length of output: 3960
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[warning] 418-418: internal/net/grpc/client.go#L418
Added line #L418 was not covered by tests
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📒 Files selected for processing (1)
internal/net/grpc/client.go(9 hunks)
🧰 Additional context used
🪛 GitHub Check: codecov/patch
internal/net/grpc/client.go
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🔇 Additional comments (2)
internal/net/grpc/client.go (2)
Line range hint
252-289: Add test coverage for connection monitoring.The connection monitoring implementation looks robust with proper error handling and health checks. However, the static analysis indicates that these critical sections lack test coverage.
Run the following script to check existing test coverage patterns:
Would you like me to help generate comprehensive test cases for the connection monitoring functionality?
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🪛 GitHub Check: codecov/patch
[warning] 252-252: internal/net/grpc/client.go#L252
Added line #L252 was not covered by tests
1117-1130: Improve error handling in rangeConns.While the implementation properly handles connection health and recovery, consider the following improvements:
- The error handling could be more specific about why a connection is unhealthy.
- Consider adding metrics or structured logging for better observability.
- Add test coverage for this critical functionality.
Consider this improvement to provide more specific error information:
func (g *gRPCClient) rangeConns(ctx context.Context, fn func(addr string, p pool.Conn) bool) error { var cnt int g.conns.Range(func(addr string, p pool.Conn) bool { if p == nil || !p.IsHealthy(ctx) { pc, err := p.Connect(ctx) if pc == nil || err != nil || !pc.IsHealthy(ctx) { if pc != nil { pc.Disconnect() } - log.Debugf("Unhealthy connection detected for %s during gRPC Connection Range over Loop:\t%s", addr, p.String()) + log.Debugf("Unhealthy connection detected for %s during gRPC Connection Range over Loop: %s, error: %v, health: %v", + addr, p.String(), err, pc != nil && pc.IsHealthy(ctx)) return true } p = pc } cnt++ return fn(addr, p) }) if cnt == 0 { return errors.ErrGRPCClientConnNotFound("*") } return nil }Run the following script to check existing test patterns:
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✅ Verification successful
Improve error handling in rangeConns - Confirmed
The review comment's suggestions are valid and align with the codebase patterns:
- The error handling in rangeConns should be more detailed, similar to other gRPC client methods in the codebase.
- The suggested logging improvement to include error details matches the established patterns.
- The test file exists at internal/net/grpc/client_test.go, making it suitable for adding test coverage.
The proposed diff in the review comment correctly addresses these issues by including error details in the log message.
🏁 Scripts executed
The following scripts were executed for the analysis:
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#!/bin/bash # Description: Check existing test patterns for rangeConns # Look for similar test patterns that we can follow rg -A 5 "TestRangeConns" --type goLength of output: 34
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#!/bin/bash # Find similar gRPC client methods and their error handling ast-grep --pattern 'func (g *gRPCClient) $_($$$) error { $$$ }' # Find test files in the same directory fd "client_test.go" --type f # Check logging patterns for gRPC errors rg "log\.(Debug|Error)f.*gRPC" -A 2Length of output: 19606
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[warning] 1117-1117: internal/net/grpc/client.go#L1117
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| @@ -701,7 +701,7 @@ | |||
| } | |||
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| do := func() (data any, err error) { | |||
| cerr := g.rangeConns(func(addr string, p pool.Conn) bool { | |||
| cerr := g.rangeConns(ctx, func(addr string, p pool.Conn) bool { | |||
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💡 Codebase verification
Test coverage needed: RoundRobin operation tests are defined but not implemented
Found test stubs in internal/net/grpc/client_test.go that are currently commented out and marked as "NOT IMPLEMENTED":
Test_gRPCClient_RoundRobinTest_gRPCClient_rangeConns
This confirms that this critical functionality, which is used throughout the codebase for connection management, lacks proper test coverage.
🔗 Analysis chain
Add test coverage for RoundRobin operation.
The RoundRobin implementation properly handles context and integrates with the circuit breaker. However, this critical path lacks test coverage.
Run the following script to check existing test patterns:
Would you like me to help generate test cases for the RoundRobin operation?
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Script:
#!/bin/bash
# Description: Check existing test patterns for RoundRobin operations
# Look for similar test patterns that we can follow
rg -A 5 "TestRoundRobin" --type go
Length of output: 34
Script:
#!/bin/bash
# Find test files in the same directory as client.go
fd "client_test.go" internal/net/grpc/
# Search for any test functions that might be testing round-robin functionality
rg -B 2 -A 5 "func Test.*" internal/net/grpc/client_test.go || true
# Look for any round-robin related code in test files
rg -i "round.*robin|rangeconns" internal/net/grpc/ --type go
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🪛 GitHub Check: codecov/patch
[warning] 704-704: internal/net/grpc/client.go#L704
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internal/net/grpc/client.go
Outdated
| ctx := context.Background() | ||
| err := g.rangeConns(ctx, func(addr string, p pool.Conn) bool { | ||
| if p != nil && p.IsHealthy(ctx) { |
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💡 Codebase verification
Add test coverage for ConnectedAddrs method
The ConnectedAddrs implementation is simple but crucial as it reports healthy connection status. While it's indirectly tested through mocks in integration tests, it lacks direct unit test coverage. Add test cases for:
- Connections with mixed health status (healthy/unhealthy)
- Error scenarios from rangeConns
- Empty connection pool scenario
🔗 Analysis chain
Add test coverage for ConnectedAddrs.
The ConnectedAddrs implementation properly uses context for health checks. However, this functionality lacks test coverage.
Run the following script to check existing test patterns:
Would you like me to help generate test cases for the ConnectedAddrs functionality?
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check existing test patterns for ConnectedAddrs
# Look for similar test patterns that we can follow
rg -A 5 "TestConnectedAddrs" --type go
Length of output: 38
Script:
#!/bin/bash
# Find the implementation of ConnectedAddrs
ast-grep --pattern 'func $_ ConnectedAddrs($$$) {$$$}'
# Find test files in the same directory as client.go
fd client_test.go
# Look for similar connection-related test patterns
rg -A 5 "Test.*Conn.*" --type go
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rg "ConnectedAddrs" --type go
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rg -A 10 "func.*ConnectedAddrs" internal/net/grpc/client.go
Length of output: 1299
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[warning] 1090-1092: internal/net/grpc/client.go#L1090-L1092
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Actionable comments posted: 0
🧹 Nitpick comments (1)
internal/net/grpc/client_test.go (1)
Line range hint
1-3305: Implement the TODO test cases for comprehensive test coverage.The file contains multiple test function skeletons with TODO comments. These tests are crucial for ensuring the reliability of the gRPC client implementation.
Would you like me to help generate the test cases? I can assist with:
- Test cases for different context scenarios (canceled, timeout, etc.)
- Test cases for various connection states
- Test cases for error conditions
- Test cases for concurrent operations
📜 Review details
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📒 Files selected for processing (3)
internal/net/grpc/client.go(10 hunks)internal/net/grpc/client_test.go(1 hunks)internal/net/grpc/pool/pool.go(1 hunks)
🧰 Additional context used
🪛 GitHub Check: codecov/patch
internal/net/grpc/pool/pool.go
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internal/net/grpc/client.go
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🔇 Additional comments (7)
internal/net/grpc/pool/pool.go (2)
Line range hint
882-882: LGTM! The health check logic is robust.The health check implementation properly handles different connection states and provides clear logging, which is crucial for debugging connection issues.
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🪛 GitHub Check: codecov/patch
[warning] 760-761: internal/net/grpc/pool/pool.go#L760-L761
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760-761: Add test coverage for the modified connection closing delay.The minimum delay for connection closing has been reduced from 200ms to 5ms. While this change might improve connection cleanup speed, it needs proper test coverage to ensure it doesn't introduce any issues with connection state management.
Run the following script to check existing test patterns:
✅ Verification successful
Existing test coverage is sufficient for the delay modification
The change is well-covered by the existing
Test_poolConn_Closetest which accepts delay as a parameter, allowing validation of different delay scenarios. The modification only adjusts the minimum threshold while maintaining the same bounded behavior and proportional delay calculation.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check existing test patterns for connection closing # Look for similar test patterns that we can follow # Find test files in the same directory fd "pool_test.go" internal/net/grpc/pool/ # Search for any test functions that might be testing connection closing rg -B 2 -A 5 "func Test.*Close" internal/net/grpc/pool/pool_test.go || true # Look for any connection closing related code in test files rg -i "close.*conn|tdelay|minimum.*delay" internal/net/grpc/pool/ --type goLength of output: 1470
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🪛 GitHub Check: codecov/patch
[warning] 760-761: internal/net/grpc/pool/pool.go#L760-L761
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1117-1130: Add test coverage for the enhanced rangeConns method.The
rangeConnsmethod has been improved with context support and better connection health management, but lacks test coverage. This is a critical method used by many other functions in the codebase.Run the following script to check existing test patterns:
#!/bin/bash # Description: Check existing test patterns for rangeConns # Look for similar test patterns that we can follow # Find test files in the same directory fd "client_test.go" internal/net/grpc/ # Search for any test functions that might be testing rangeConns rg -B 2 -A 5 "func Test.*rangeConns" internal/net/grpc/client_test.go || true # Look for any rangeConns related code in test files rg -i "range.*conns|connection.*range" internal/net/grpc/ --type go🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 1117-1117: internal/net/grpc/client.go#L1117
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1090-1092: Add test coverage for the context-aware ConnectedAddrs method.The
ConnectedAddrsmethod now uses context for health checks but lacks test coverage. Add test cases for:
- Connections with mixed health status (healthy/unhealthy)
- Error scenarios from rangeConns
- Empty connection pool scenario
Run the following script to check existing test patterns:
#!/bin/bash # Description: Check existing test patterns for ConnectedAddrs # Look for similar test patterns that we can follow # Find test files in the same directory fd "client_test.go" internal/net/grpc/ # Search for any test functions that might be testing ConnectedAddrs rg -B 2 -A 5 "func Test.*ConnectedAddrs" internal/net/grpc/client_test.go || true # Look for any ConnectedAddrs related code in test files rg -i "connected.*addrs|healthy.*addrs" internal/net/grpc/ --type go🧰 Tools
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[warning] 1090-1092: internal/net/grpc/client.go#L1090-L1092
Added lines #L1090 - L1092 were not covered by tests
704-704: Add test coverage for the context-aware RoundRobin method.The
RoundRobinimplementation properly handles context and integrates with the circuit breaker. However, this critical path lacks test coverage.Run the following script to check existing test patterns:
#!/bin/bash # Description: Check existing test patterns for RoundRobin # Look for similar test patterns that we can follow # Find test files in the same directory fd "client_test.go" internal/net/grpc/ # Search for any test functions that might be testing RoundRobin rg -B 2 -A 5 "func Test.*RoundRobin" internal/net/grpc/client_test.go || true # Look for any RoundRobin related code in test files rg -i "round.*robin|load.*balance" internal/net/grpc/ --type go🧰 Tools
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[warning] 704-704: internal/net/grpc/client.go#L704
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3306-3306: LGTM! Context parameter addition aligns with the implementation.The addition of the
ctx context.Contextparameter to therangeConnstest function signature correctly reflects the changes made to the implementation.
Line range hint
1-3306: Excellent test structure and patterns.The test implementation follows Go best practices:
- Uses table-driven tests
- Implements parallel test execution
- Includes goroutine leak detection
- Provides proper setup/teardown hooks
- Uses helper functions for error checking
Signed-off-by: kpango <kpango@vdaas.org>
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Actionable comments posted: 0
🔭 Outside diff range comments (1)
internal/test/mock/grpc_testify_mock.go (1)
Line range hint
202-211: Fix context parameter handling in mock implementation.The method is not properly handling the new context parameter. The
Called()method should include the context parameter to maintain consistency with the real implementation and ensure proper test behavior.Apply this diff to fix the context handling:
func (c *ClientInternal) ConnectedAddrs(ctx context.Context) []string { - args := c.Called() + args := c.Called(ctx) v, ok := args.Get(0).([]string) if !ok { // panic here like testify mock does panic(fmt.Sprintf("The provided arg(%v) is not type []string", args.Get(0))) } return v }
🧹 Nitpick comments (1)
internal/net/grpc/client.go (1)
1121-1134: Improve error handling in rangeConns.While the health check logic is sound, consider adding more detailed error information when connections fail to reconnect.
Apply this diff to improve error logging:
- log.Debugf("Unhealthy connection detected for %s during gRPC Connection Range over Loop:\t%s", addr, p.String()) + log.Debugf("Unhealthy connection detected for %s during gRPC Connection Range over Loop:\t%s\terror: %v", addr, p.String(), err)
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📒 Files selected for processing (8)
internal/net/grpc/client.go(12 hunks)internal/net/grpc/client_test.go(2 hunks)internal/net/grpc/pool/pool.go(4 hunks)internal/net/grpc/pool/pool_test.go(1 hunks)internal/test/mock/grpc/grpc_client_mock.go(1 hunks)internal/test/mock/grpc_testify_mock.go(1 hunks)pkg/gateway/lb/handler/grpc/aggregation.go(4 hunks)pkg/gateway/mirror/service/mirror.go(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- internal/net/grpc/client_test.go
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🔇 Additional comments (8)
internal/test/mock/grpc/grpc_client_mock.go (1)
54-56: LGTM! Mock implementation updated correctly.The mock implementation has been properly updated to match the new context-aware interface signature. The unused context parameter is correctly marked with
_as per Go conventions for mock implementations.pkg/gateway/mirror/service/mirror.go (1)
163-163: LGTM! Context properly propagated.The context is correctly passed to
ConnectedAddrs, maintaining proper context propagation through the call chain.pkg/gateway/lb/handler/grpc/aggregation.go (1)
104-104: LGTM! Enhanced error observability.Added debug logging consistently across error handling paths, improving observability without affecting the control flow. The debug level is appropriate for these handled error cases.
Also applies to: 116-116, 173-173, 185-185
internal/net/grpc/pool/pool_test.go (1)
2347-2347: Add test cases for context cancellation scenarios.The test has been updated to pass context.Background(), but it would be valuable to add test cases that verify behavior with:
- Cancelled context
- Context with timeout
- Context with deadline
Let's check if there are any existing timeout/cancellation test patterns:
internal/net/grpc/pool/pool.go (2)
Line range hint
440-467: LGTM! Context propagation is properly implemented.The Disconnect method now properly handles context cancellation and propagates it through the connection closing process.
759-760: Verify impact of reduced minimum delay.The minimum delay for connection closing has been reduced from 200ms to 5ms. While this improves connection closing speed, verify that this doesn't cause issues with in-flight requests.
Let's check for any existing issues or discussions about connection closing delays:
✅ Verification successful
Reduced minimum delay is safe and well-implemented
The change is safe because:
- The 5ms is only for the ticker interval, making the actual minimum delay 50ms (delay = ticker_interval * 10)
- The implementation uses proper gRPC connection state monitoring and error handling
- In-flight requests are handled safely through gRPC's built-in connection management
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Search for connection closing delay related code and issues # Look for similar delay patterns in the codebase rg "time\.(Millisecond|Second|Minute)" --type go internal/net/grpc/Length of output: 1289
Script:
#!/bin/bash # Search for connection closing and request handling logic ast-grep --pattern 'func $_($$$) { $$$ close($$$) $$$ }' # Look for graceful shutdown patterns rg "graceful|shutdown|inflight|in-flight|drain" --type go internal/net/grpc/ # Get more context around the delay usage rg -B 5 -A 5 "tdelay.*Millisecond" internal/net/grpc/pool/pool.goLength of output: 5944
Script:
#!/bin/bash # Get the full connection closing implementation rg -B 10 -A 20 "func \(pc \*poolConn\) Close" internal/net/grpc/pool/pool.go # Look for connection state management rg "conn\.(State|GetState)" --type go internal/net/grpc/Length of output: 1091
internal/net/grpc/client.go (2)
Line range hint
1088-1097: LGTM! Context-aware health checks properly implemented.The ConnectedAddrs method now properly uses context for health checks and connection verification.
1107-1115: LGTM! Proper context handling in Close method.The Close method now correctly handles context cancellation during cleanup.
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Actionable comments posted: 2
🔭 Outside diff range comments (2)
internal/net/grpc/client.go (1)
Add test coverage for ConnectedAddrs method
The
ConnectedAddrsmethod lacks test coverage, as evidenced by the commented-out test case ininternal/net/grpc/client_test.go. Implement the test using the existing structure that covers:
- Connection pool with mixed health states
- Error handling from
rangeConns- Empty connection pool scenario
🔗 Analysis chain
Line range hint
1088-1097: Add test coverage for ConnectedAddrs methodThe
ConnectedAddrsimplementation properly uses context for health checks. However, this functionality lacks test coverage. Add test cases for:
- Connections with mixed health status (healthy/unhealthy)
- Error scenarios from rangeConns
- Empty connection pool scenario
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check existing test patterns for ConnectedAddrs # Look for similar test patterns that we can follow rg -A 5 "TestConnectedAddrs" --type go # Find test files in the same directory as client.go fd client_test.go # Look for similar connection-related test patterns rg -A 5 "Test.*Conn.*" --type goLength of output: 19813
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[warning] 1088-1088: internal/net/grpc/client.go#L1088
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[warning] 1090-1091: internal/net/grpc/client.go#L1090-L1091
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1-3000: Implement missing test cases, especially for health check functionalityMost test cases in this file are commented out with TODO markers. Given that this PR focuses on health check functionality for gRPC connections, it's crucial to implement at least the following test cases:
Test_pool_IsHealthyTest_isHealthy- Health check related scenarios in
Test_pool_getHealthyConnThis will help ensure the bugfix is properly tested and prevent regressions.
Would you like me to help generate the test implementations for these critical test cases?
🧹 Nitpick comments (3)
internal/net/grpc/client.go (2)
Line range hint
1121-1141: Improve error handling in rangeConnsWhile the health check logic is good, consider improving error handling:
- Log connection errors with more details
- Consider adding circuit breaker pattern for failing connections
- Add metrics for connection health status
func (g *gRPCClient) rangeConns(ctx context.Context, fn func(addr string, p pool.Conn) bool) error { var cnt int g.conns.Range(func(addr string, p pool.Conn) bool { if p == nil || !p.IsHealthy(ctx) { pc, err := p.Connect(ctx) if pc == nil || err != nil || !pc.IsHealthy(ctx) { if pc != nil { pc.Disconnect(ctx) } - log.Debugf("Unhealthy connection detected for %s during gRPC Connection Range over Loop:\t%s", addr, p.String()) + log.Warnf("Unhealthy connection detected for %s during gRPC Connection Range over Loop:\t%s, error: %v", + addr, p.String(), err) + metrics.RecordConnectionFailure(addr) return true } p = pc } cnt++ return fn(addr, p) }) if cnt == 0 { return errors.ErrGRPCClientConnNotFound("*") } return nil }🧰 Tools
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[warning] 1107-1115: internal/net/grpc/client.go#L1107-L1115
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1107-1115: Improve connection cleanup in Close methodThe connection cleanup could be improved:
- Add timeout for cleanup operations
- Consider parallel cleanup with errgroup
- Add metrics for cleanup duration
+ eg, egctx := errgroup.New(ctx) select { case <-ctx.Done(): return false default: - derr := g.Disconnect(ctx, addr) - if derr != nil && !errors.Is(derr, errors.ErrGRPCClientConnNotFound(addr)) { - err = errors.Join(err, derr) - } + eg.Go(safety.RecoverFunc(func() error { + start := time.Now() + defer metrics.RecordCleanupDuration(addr, time.Since(start)) + derr := g.Disconnect(ctx, addr) + if derr != nil && !errors.Is(derr, errors.ErrGRPCClientConnNotFound(addr)) { + return derr + } + return nil + })) return true }🧰 Tools
🪛 GitHub Check: codecov/patch
[warning] 1107-1115: internal/net/grpc/client.go#L1107-L1115
Added lines #L1107 - L1115 were not covered by testsinternal/net/grpc/pool/pool_test.go (1)
Line range hint
1-3000: Consider improvements to the test structureWhile the test structure follows good practices with table-driven tests, parallel execution, and goroutine leak detection, consider these improvements:
- Add test case descriptions in the
namefield to clearly indicate what each test verifies- Consider using test helper functions to reduce boilerplate in test cases
- Add subtests for different scenarios within each test function
- Consider using
testing.TBinterface instead of*testing.Tfor better test utility reuseExample of improved test case structure:
tests := []test{ + { + name: "should_handle_healthy_connection_successfully", + args: args{ + ctx: testutil.NewContextWithTimeout(t), + }, + fields: fields{ + // ... + }, + want: want{ + wantHealthy: true, + }, + }, + { + name: "should_handle_unhealthy_connection_gracefully", + args: args{ + ctx: testutil.NewContextWithTimeout(t), + }, + fields: fields{ + // ... + }, + want: want{ + wantHealthy: false, + }, + }, }
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📒 Files selected for processing (8)
internal/net/grpc/client.go(12 hunks)internal/net/grpc/client_test.go(2 hunks)internal/net/grpc/pool/pool.go(4 hunks)internal/net/grpc/pool/pool_test.go(1 hunks)internal/test/mock/grpc/grpc_client_mock.go(1 hunks)internal/test/mock/grpc_testify_mock.go(1 hunks)pkg/gateway/lb/handler/grpc/aggregation.go(4 hunks)pkg/gateway/mirror/service/mirror.go(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (1)
- internal/net/grpc/client_test.go
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pkg/gateway/lb/handler/grpc/aggregation.go
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internal/test/mock/grpc_testify_mock.go
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internal/test/mock/grpc/grpc_client_mock.go
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pkg/gateway/mirror/service/mirror.go
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internal/net/grpc/client.go
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internal/net/grpc/pool/pool.go
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🔇 Additional comments (8)
internal/test/mock/grpc/grpc_client_mock.go (1)
54-56: LGTM! Mock implementation updated correctly.The mock implementation has been properly updated to match the new interface signature while maintaining its simple mock behavior.
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[warning] 54-54: internal/test/mock/grpc/grpc_client_mock.go#L54
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202-210: LGTM! Testify mock updated correctly.The testify mock implementation has been properly updated to match the new interface signature while maintaining its existing mock behavior.
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[warning] 202-202: internal/test/mock/grpc_testify_mock.go#L202
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104-104: LGTM! Enhanced error visibility with debug logs.Debug logging has been appropriately added to error handling paths to improve visibility of connection and timeout issues.
The error handling paths should be covered by tests. Let's verify the test coverage:
Also applies to: 116-116, 173-173, 185-185
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[warning] 104-104: pkg/gateway/lb/handler/grpc/aggregation.go#L104
Added line #L104 was not covered by testsinternal/net/grpc/pool/pool.go (4)
48-50: LGTM! Interface changes improve context-awarenessThe addition of context.Context parameters to Disconnect and Get methods aligns with Go's context usage patterns and enables better control over timeouts and cancellations.
759-760: Verify impact of reduced connection closure delayThe minimum delay for closing connections has been reduced from 200ms to 5ms. While this could improve cleanup speed, verify that:
- 5ms is sufficient for proper connection cleanup
- This change doesn't cause connection instability
- The timing works well across different network conditions
Consider adding metrics to monitor connection closure timing and failures to validate these changes in production.
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[warning] 759-760: internal/net/grpc/pool/pool.go#L759-L760
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440-440: Add test coverage for connection management changesThe following critical changes lack test coverage:
- Context-aware Disconnect method
- Connection closure with reduced timing
- Health check behavior with context
Would you like me to help generate test cases for these scenarios? Key test cases should include:
- Context cancellation during disconnect
- Connection closure with minimum delay (5ms)
- Connection closure with maximum delay (>1min)
- Health checks with various context timeouts
Also applies to: 620-620, 759-760
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[warning] 440-440: internal/net/grpc/pool/pool.go#L440
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440-462: LGTM! Robust error handling in DisconnectThe error handling is comprehensive and properly handles:
- Context cancellation
- Connection closure errors
- Error aggregation for multiple failures
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🪛 GitHub Check: codecov/patch
[warning] 440-440: internal/net/grpc/pool/pool.go#L440
Added line #L440 was not covered by testsinternal/net/grpc/client.go (1)
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252-289: Add test coverage for critical code pathsSeveral critical code paths lack test coverage:
- Connection pool management in
rangeConns- Health check logic
- Connection cleanup
- Round-robin connection handling
This is particularly important for reliability and maintainability.
Also applies to: 418-481, 568-637, 704-889, 1069-1133
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🪛 GitHub Check: codecov/patch
[warning] 252-252: internal/net/grpc/client.go#L252
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