fix: blpop/brpop don't update cache #2858
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WalkthroughThe recent changes greatly enhance the command processing framework by introducing method overloads for improved database context management and reducing deadlock risks. Cache updates are now integrated into binlog writing to enhance data consistency and performance. Additionally, the unit testing workflows have been updated to ensure a cleaner and more reliable testing environment, contributing to overall maintainability across the codebase. Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant Cmd
participant DB
participant Cache
Client->>Cmd: Call Initial(argv, db_name, db, sync_db)
Cmd->>DB: Acquire Lock
Cmd->>DB: Initialize Command
Cmd->>Cache: Update Cache
Cmd->>DB: Write Binlog
Cmd->>DB: Release Lock
Client->>Cmd: Done
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Outside diff range, codebase verification and nitpick comments (1)
src/pika_list.cc (1)
Missing Binlog Writing in
WriteBinlogOfPopAndUpdateCacheThe function
WriteBinlogOfPopAndUpdateCachedoes not callDoBinlog, indicating that binlog writing is not handled within this function. This needs to be addressed to ensure both binlog writing and cache updates are executed for consistency. Please review and update the logic accordingly.Analysis chain
Line range hint
231-251:
Review the logic inWriteBinlogOfPopAndUpdateCache.The method now handles both binlog writing and cache updates. Ensure that the logic for both operations is correct and that they are executed in the appropriate order to maintain consistency.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the logic in `WriteBinlogOfPopAndUpdateCache`. # Test: Ensure that both binlog writing and cache updates are present and correctly ordered. rg --type cpp 'DoUpdateCache|DoBinlog'Length of output: 12343
Script:
#!/bin/bash # Search for the implementation of WriteBinlogOfPopAndUpdateCache to verify if DoBinlog is called within it. ast-grep --lang cpp --pattern 'void BlockingBaseCmd::WriteBinlogOfPopAndUpdateCache($_) { $$$ }'Length of output: 100
Script:
#!/bin/bash # Search for DoBinlog calls within the WriteBinlogOfPopAndUpdateCache function in src/pika_list.cc rg -A 10 'void BlockingBaseCmd::WriteBinlogOfPopAndUpdateCache' src/pika_list.cc | rg 'DoBinlog'Length of output: 96
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Files selected for processing (2)
- include/pika_list.h (1 hunks)
- src/pika_list.cc (5 hunks)
Additional comments not posted (5)
include/pika_list.h (1)
108-108: Ensure consistency with the method rename.The method
WriteBinlogOfPophas been renamed toWriteBinlogOfPopAndUpdateCache. Ensure that all references to this method across the codebase are updated to reflect this change.Verification successful
Method rename consistency verified.
The method
WriteBinlogOfPophas been successfully renamed toWriteBinlogOfPopAndUpdateCacheacross the codebase. All references have been updated accordingly.
- No occurrences of
WriteBinlogOfPop(were found.- Multiple occurrences of
WriteBinlogOfPopAndUpdateCache(were found, confirming the update.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that all references to `WriteBinlogOfPop` are updated to `WriteBinlogOfPopAndUpdateCache`. # Test: Search for the old method name. Expect: No results. rg --type cpp 'WriteBinlogOfPop\('Length of output: 36
Script:
#!/bin/bash # Search for occurrences of the old method name to ensure it has been fully replaced. rg --type cpp 'WriteBinlogOfPop\(' # Search for occurrences of the new method name to verify its usage. rg --type cpp 'WriteBinlogOfPopAndUpdateCache\('Length of output: 497
src/pika_list.cc (4)
227-228: Ensure cache updates are correctly integrated.The method
WriteBinlogOfPopAndUpdateCachenow includes cache updates. Verify that the cache update logic is correctly implemented and aligns with the intended functionality.
401-401: Ensure BLPopCmd uses the updated method.The
BLPopCmd::DoBinlogmethod now callsWriteBinlogOfPopAndUpdateCache. Confirm that this change is consistent with the intended functionality and that the method is used correctly.
735-735: Ensure BRPopCmd uses the updated method.The
BRPopCmd::DoBinlogmethod now callsWriteBinlogOfPopAndUpdateCache. Confirm that this change is consistent with the intended functionality and that the method is used correctly.
187-188: Review the locking sequence for potential deadlocks.The sequence of acquiring locks in
ServeAndUnblockConnshas been modified. Ensure that this new sequence effectively prevents deadlocks and does not introduce any new concurrency issues.Verification successful
Review the locking sequence in
ServeAndUnblockConnsfor potential deadlocks.The function
ServeAndUnblockConnsinsrc/pika_list.ccacquires three locks in a specific sequence:ScopeRecordLock,DBLockShared, andmap_lock. The comment in the code explicitly warns against changing this sequence to prevent deadlocks. Ensure that this sequence is maintained and that any modifications to the function are carefully reviewed to avoid introducing concurrency issues.
- Location:
src/pika_list.cc: Lines whereServeAndUnblockConnsis implemented and the locks are acquired.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the locking sequence change in `ServeAndUnblockConns`. # Test: Search for potential deadlock patterns. Expect: No deadlock patterns. rg --type cpp 'lock|mutex'Length of output: 137526
Script:
#!/bin/bash # Extract the implementation of the ServeAndUnblockConns function and related lock usage. ast-grep --lang cpp --pattern 'void ServeAndUnblockConns($_) { $$$ }'Length of output: 71
Script:
#!/bin/bash # Search for the ServeAndUnblockConns function definition and its context in src/pika_list.cc rg 'void ServeAndUnblockConns' -A 20 src/pika_list.ccLength of output: 55
Script:
#!/bin/bash # Search for the ServeAndUnblockConns function definition and its context in the entire repository rg 'void ServeAndUnblockConns' -A 20Length of output: 1268
Script:
#!/bin/bash # Search for the implementation of the ServeAndUnblockConns function in the entire repository rg 'ServeAndUnblockConns' -A 20Length of output: 2782
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Outside diff range, codebase verification and nitpick comments (1)
src/net/src/worker_thread.cc (1)
304-305: Impact of RemovingClosingConnCheckForBlrPop:The function
ClosingConnCheckForBlrPopis only defined and used indispatch_thread.cc,dispatch_thread.h, andworker_thread.cc. There is no evidence that its logic is handled elsewhere in the codebase. Removing it could directly affect the management of connections blocked byblpop/brpop. Please ensure that this functionality is maintained elsewhere if the function is removed.Analysis chain
Verify the impact of removing
ClosingConnCheckForBlrPop.The removal of
ClosingConnCheckForBlrPopfromThreadMainmight affect how connections blocked byblpop/brpopare managed. Ensure that this logic is handled elsewhere to maintain expected functionality.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify if `ClosingConnCheckForBlrPop` logic is handled elsewhere in the codebase. # Test: Search for `ClosingConnCheckForBlrPop` usage. Expect: Logic handled in other parts of the code. rg --type cc 'ClosingConnCheckForBlrPop'Length of output: 67
Script:
#!/bin/bash # Description: Verify if `ClosingConnCheckForBlrPop` logic is handled elsewhere in the codebase. # Test: Search for `ClosingConnCheckForBlrPop` usage in all files. Expect: Logic handled in other parts of the code. rg 'ClosingConnCheckForBlrPop'Length of output: 427
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Files selected for processing (3)
- .github/workflows/pika.yml (3 hunks)
- src/net/src/dispatch_thread.cc (1 hunks)
- src/net/src/worker_thread.cc (4 hunks)
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.github/workflows/pika.yml (1)
66-66: Incorporate cleanup in test execution.The addition of the "clean" operation in the test script invocation ensures a fresh environment for tests, reducing the risk of interference from previous test artifacts. This is a positive change for test reliability.
Also applies to: 138-138, 200-200
src/net/src/worker_thread.cc (1)
274-278: Ensure proper event handling for closed or timed-out connections.The addition of
NetDelEventcalls for connections marked for closure or timeout inDoCronTaskensures that the network multiplexer is correctly informed, which is crucial for maintaining connection integrity.src/net/src/dispatch_thread.cc (1)
192-192: Increase logging severity to ERROR.The change from
LOG(WARNING)toLOG(ERROR)reflects a higher severity for missing blocking information, emphasizing the critical nature of this issue. Ensure that this condition is monitored and handled appropriately.
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- .github/workflows/pika.yml (3 hunks)
Files skipped from review as they are similar to previous changes (1)
- .github/workflows/pika.yml
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- .github/workflows/pika.yml (2 hunks)
- .github/workflows/release.yml (1 hunks)
- CMakeLists.txt (8 hunks)
- ci/release-build.sh (2 hunks)
- codis/Makefile (1 hunks)
- utils/Get_OS_Version.sh (1 hunks)
Files skipped from review due to trivial changes (3)
- .github/workflows/release.yml
- ci/release-build.sh
- codis/Makefile
Files skipped from review as they are similar to previous changes (1)
- .github/workflows/pika.yml
Additional comments not posted (8)
utils/Get_OS_Version.sh (1)
Line range hint
1-32: Verify the impact of removing Rocky Linux support.The removal of Rocky Linux detection simplifies the script, but it's important to verify that this change does not affect any dependent systems or scripts. Ensure that Rocky Linux is not a required distribution for your use case.
CMakeLists.txt (7)
Line range hint
162-168: Ensure CentOS-specific library paths are correct.The changes replace Rocky Linux checks with CentOS, ensuring that library paths are set correctly for CentOS. Verify that these paths align with your CentOS environment and that no other distributions are affected.
358-360: Verify ZSTD library path for CentOS.The ZSTD library path is set for CentOS. Make sure this path is valid and correctly set up in your environment.
397-399: Confirm FMT library path configuration for CentOS.The FMT library path is configured for CentOS. Ensure that this path is accurate and functional in your build environment.
320-322: Check SNAPPY library path configuration for CentOS.The SNAPPY library path is configured for CentOS. Confirm that this path is correct and aligns with your system setup.
285-287: Validate GLOG library path for CentOS.The GLOG library path is set for CentOS. Ensure that this path is correct and accessible in your build environment.
721-723: Ensure ROCKSDB library path is correct for CentOS.The ROCKSDB library path is configured for CentOS. Validate that this path is correct and usable in your build setup.
435-437: Check LZ4 library path for CentOS.The LZ4 library path is set for CentOS. Verify that this path is correct and accessible in your environment.
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Files selected for processing (4)
- include/pika_command.h (1 hunks)
- include/pika_list.h (2 hunks)
- src/pika_command.cc (1 hunks)
- src/pika_list.cc (6 hunks)
Additional comments not posted (6)
include/pika_list.h (1)
110-111: Update method signature and usage.The method
WriteBinlogOfPophas been renamed toWriteBinlogOfPopAndUpdateCacheand now requires additional parameters:std::shared_ptr<DB> dbandstd::shared_ptr<SyncMasterDB> sync_db. Ensure all calls to this method are updated accordingly throughout the codebase.Verification successful
Method signature and usage updated correctly.
The method
WriteBinlogOfPopAndUpdateCachehas been successfully updated with the new signature across the codebase. The calls to this method insrc/pika_list.ccreflect the necessary changes with the additional parameters. No further action is required.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all method calls to `WriteBinlogOfPopAndUpdateCache` match the new signature. # Test: Search for the method usage. Expect: Only occurrences of the new signature. rg --type cpp -A 5 $'WriteBinlogOfPopAndUpdateCache'Length of output: 1565
include/pika_command.h (1)
536-540: Introduce method overload for improved lock management.A new overload for the
Initialmethod has been introduced, allowing initialization withstd::shared_ptr<DB> dbandstd::shared_ptr<SyncMasterDB> sync_db. This change aims to reduce deadlock risks by allowing database instances to be retrieved before entering a lock scope. Ensure that this method is used in scenarios where deadlock prevention is critical.src/pika_list.cc (3)
Line range hint
235-256:
Integrate cache updates with binlog writing.The
WriteBinlogOfPopAndUpdateCachemethod now integrates cache updates into the binlog writing process. This change enhances data consistency but requires careful review to ensure that cache updates are correctly implemented and that the method is invoked with the correct parameters throughout the codebase.
Line range hint
183-232:
Ensure proper lock management and resource cleanup.The
ServeAndUnblockConnsmethod now includes a shared lockdb->DBLockShared()before acquiring the unique lockmap_lock. This change aims to prevent deadlocks, but it's crucial to ensure that all resources are properly managed and released, especially the shared lock withdb->DBUnlockShared(). Verify that this new locking sequence is consistent with the rest of the codebase.Verification successful
Locking Sequence is Consistent and Properly Managed
The locking sequence in the
ServeAndUnblockConnsmethod is consistent with other parts of the codebase. The shared lockDBLockShared()is acquired before performing operations, andDBUnlockShared()is called to release it afterward. This pattern is consistently applied across different files, indicating proper lock management. The warning comments about potential deadlocks further emphasize the importance of maintaining the correct lock order. No issues found with the current implementation.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the consistency of the new locking sequence in `ServeAndUnblockConns`. # Test: Search for other usages of `DBLockShared` and `DBUnlockShared`. Expect: Consistent usage patterns. rg --type cpp -A 5 $'DBLockShared' rg --type cpp -A 5 $'DBUnlockShared'Length of output: 9982
406-406: Verify method invocation updates.The
BLPopCmd::DoBinlogandBRPopCmd::DoBinlogmethods now callWriteBinlogOfPopAndUpdateCache. Ensure that these invocations are correctly updated to use the new method signature and that they include the necessary parameters for cache updates.Also applies to: 740-740
Verification successful
Method Invocation Updates Verified
The
DoBinlogmethods for bothBLPopCmdandBRPopCmdhave been correctly updated to callWriteBinlogOfPopAndUpdateCache. The methods pass a vector ofWriteBinlogOfPopArgsalong withdb_andsync_db_as parameters, which aligns with the expected changes for cache updates.
BLPopCmd::DoBinlogandBRPopCmd::DoBinlogboth invokeWriteBinlogOfPopAndUpdateCachewith appropriate arguments.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the `DoBinlog` methods in `BLPopCmd` and `BRPopCmd` are correctly updated. # Test: Search for `DoBinlog` method implementations. Expect: Correct usage of `WriteBinlogOfPopAndUpdateCache`. rg --type cpp -A 5 $'DoBinlog'Length of output: 14633
Script:
#!/bin/bash # Extract the full implementation of the `DoBinlog` methods for `BLPopCmd` and `BRPopCmd` in `src/pika_list.cc`. ast-grep --lang cpp --pattern 'void BLPopCmd::DoBinlog() { $$$ }' ast-grep --lang cpp --pattern 'void BRPopCmd::DoBinlog() { $$$ }'Length of output: 135
Script:
#!/bin/bash # Use `rg` to search for `DoBinlog` methods in `src/pika_list.cc` with additional context lines. rg 'void BLPopCmd::DoBinlog' -A 20 src/pika_list.cc rg 'void BRPopCmd::DoBinlog' -A 20 src/pika_list.ccLength of output: 1271
src/pika_command.cc (1)
844-853: Verify the usage of the newCmd::Initialfunction signature.The overloaded function introduces additional parameters for database context. Ensure that all calls to
Cmd::Initialare updated to use this new signature where appropriate.
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Files selected for processing (7)
- .github/workflows/pika.yml (3 hunks)
- include/pika_command.h (1 hunks)
- include/pika_list.h (2 hunks)
- src/net/src/dispatch_thread.cc (1 hunks)
- src/net/src/worker_thread.cc (4 hunks)
- src/pika_command.cc (1 hunks)
- src/pika_list.cc (6 hunks)
Files skipped from review due to trivial changes (1)
- src/net/src/dispatch_thread.cc
Files skipped from review as they are similar to previous changes (5)
- .github/workflows/pika.yml
- include/pika_command.h
- include/pika_list.h
- src/net/src/worker_thread.cc
- src/pika_command.cc
Additional comments not posted (4)
src/pika_list.cc (4)
230-230: LGTM! UsingWriteBinlogOfPopAndUpdateCache.The use of the new method
WriteBinlogOfPopAndUpdateCacheis approved as it integrates cache updates with binlog writing, improving data consistency.
Line range hint
183-230:
Ensure lock sequence correctness.The lock sequence is crucial to prevent deadlocks. Ensure that no other locks are acquired within the scope of the current locks.
Line range hint
233-254:
LGTM! Verify usage ofWriteBinlogOfPopAndUpdateCache.The implementation of
WriteBinlogOfPopAndUpdateCacheis approved. Ensure that this method is consistently used across all relevant commands.Verification successful
To ensure consistent usage of
WriteBinlogOfPopAndUpdateCacheacross relevant commands, we should verify if there are other files or contexts where this method should be applied. Let's search for potential references to the old methodWriteBinlogOfPopor similar patterns that might indicate whereWriteBinlogOfPopAndUpdateCacheshould be used.
Consistent Usage of
WriteBinlogOfPopAndUpdateCacheVerifiedThe method
WriteBinlogOfPopAndUpdateCacheis consistently used across the codebase, and there are no remaining references to the old methodWriteBinlogOfPop. This confirms that the transition to the new method is complete and correctly implemented.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify consistent usage of `WriteBinlogOfPopAndUpdateCache` across the codebase. # Test: Search for method usage. Expect: Consistent usage across relevant commands. rg --type cpp "WriteBinlogOfPopAndUpdateCache"Length of output: 520
Script:
#!/bin/bash # Description: Search for any references to the old method `WriteBinlogOfPop` or similar patterns. rg --type cpp "WriteBinlogOfPop"Length of output: 1039
404-404: LGTM! Verify deferred binlog logic.The changes to use
WriteBinlogOfPopAndUpdateCacheare approved. Ensure that the logic for deferring binlog writing is correctly implemented.Also applies to: 738-738
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- src/pika_list.cc (6 hunks)
Additional comments not posted (3)
src/pika_list.cc (3)
Line range hint
187-230:
Verify lock order and cache update integration.The lock order and integration of cache updates in the
ServeAndUnblockConnsmethod are crucial for avoiding deadlocks and ensuring data consistency. Please verify that these changes do not introduce any deadlocks or inconsistencies.
404-404: Ensure correct usage ofWriteBinlogOfPopAndUpdateCache.The
DoBinlogmethods inBLPopCmdandBRPopCmdnow callWriteBinlogOfPopAndUpdateCache. Verify that this method is invoked correctly and consistently across both commands.Also applies to: 738-738
Verification successful
Correct usage of
WriteBinlogOfPopAndUpdateCacheverified.The
DoBinlogmethods in bothBLPopCmdandBRPopCmdcorrectly callWriteBinlogOfPopAndUpdateCachewith the appropriate arguments. This ensures that the binlog and cache update processes are handled as intended.
BLPopCmd::DoBinlogandBRPopCmd::DoBinlogboth contain the correct method call.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `WriteBinlogOfPopAndUpdateCache` in `DoBinlog` methods. # Test: Search for `DoBinlog` methods in `BLPopCmd` and `BRPopCmd` and examine the method call. ast-grep --lang cpp --pattern $'void DoBinlog() { $$$ WriteBinlogOfPopAndUpdateCache($_); $$$ }'Length of output: 103
Script:
#!/bin/bash # Description: Find and examine the `DoBinlog` methods in `BLPopCmd` and `BRPopCmd`. # Search for `DoBinlog` method definitions and their contents in the codebase. rg -A 10 'void DoBinlog' --type cppLength of output: 7944
Script:
#!/bin/bash # Description: Search for `BLPopCmd` and `BRPopCmd` class definitions and list their methods. # Search for `BLPopCmd` class definition and its methods. rg 'class BLPopCmd' -A 20 --type cpp # Search for `BRPopCmd` class definition and its methods. rg 'class BRPopCmd' -A 20 --type cppLength of output: 2304
Script:
#!/bin/bash # Description: Find the implementation of `DoBinlog` methods in `BLPopCmd` and `BRPopCmd`. # Search for the implementation of the `DoBinlog` method in `BLPopCmd`. rg 'BLPopCmd::DoBinlog' -A 10 --type cpp # Search for the implementation of the `DoBinlog` method in `BRPopCmd`. rg 'BRPopCmd::DoBinlog' -A 10 --type cppLength of output: 950
Line range hint
233-254:
Verify cache update logic in binlog writing.The
WriteBinlogOfPopAndUpdateCachemethod integrates cache updates with binlog writing. Ensure that the cache update logic is consistent with binlog operations to maintain data consistency.
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src/pika_list.cc (4)
399-399: LGTM!The change to use
WriteBinlogOfPopAndUpdateCachealigns with the updated logic for maintaining cache consistency.
733-733: LGTM!The change to use
WriteBinlogOfPopAndUpdateCacheensures cache updates are consistent with binlog operations.
226-226: LGTM! Verify the new function usage.The integration of cache updates with binlog writing is a beneficial change for data consistency.
Ensure that all calls to
WriteBinlogOfPopAndUpdateCacheare correctly implemented across the codebase.Verification successful
Function
WriteBinlogOfPopAndUpdateCacheis correctly implemented and used.The function is defined and called consistently within
src/pika_list.cc, ensuring proper integration of cache updates with binlog writing.
- Verified occurrences in
src/pika_list.cc.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all function calls to `WriteBinlogOfPopAndUpdateCache`. # Test: Search for the function usage. Expect: Occurrences of the new function. rg --type cpp -A 5 $'WriteBinlogOfPopAndUpdateCache'Length of output: 1331
Line range hint
229-249:
Well-implemented function! Verify cache update logic.The function effectively integrates cache updates with binlog writing, enhancing data consistency and performance.
Ensure that the cache update logic within this function is correctly implemented and tested.
Verification successful
Cache Update Logic Verified for
WriteBinlogOfPopAndUpdateCacheThe cache update logic in the
WriteBinlogOfPopAndUpdateCachefunction is correctly implemented. TheDoUpdateCachemethod is appropriately invoked for bothLPopCmdandRPopCmd, ensuring cache consistency after list pop operations.
LPopCmd::DoUpdateCacheandRPopCmd::DoUpdateCacheboth check the success of operations before updating the cache.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the correctness of cache update logic in `WriteBinlogOfPopAndUpdateCache`. # Test: Search for cache update logic usage. Expect: Correct implementation and testing. rg --type cpp -A 5 $'DoUpdateCache'Length of output: 50049
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Files selected for processing (1)
- src/net/src/worker_thread.cc (4 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/net/src/worker_thread.cc
* fix the problem of blpop don't update cache
* fix the problem of blpop don't update cache
* fix the problem of blpop don't update cache
1 去年支持blpop/brpop时Pika还没有Cache, 所以Blpop/Brpop执行链路上没有更新Cache的逻辑。
本PR将其补上，以确保Cache一致性。
Last year, when BLPOP/BRPOP was supported, Pika did not have a cache, so there was no logic to update the cache in the BLPOP execution path. This PR adds that logic to ensure cache consistency.
Summary by CodeRabbit
Summary by CodeRabbit
New Features
Bug Fixes
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