Mirror/seaweedfs - seaweedfs - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Chris Lu	5b86d33c3c	Fix worker reconnection race condition causing context canceled errors (#7825 ) * Fix worker reconnection race condition causing context canceled errors Fixes #7824 This commit fixes critical connection stability issues between admin server and workers that manifested as rapid reconnection cycles with 'context canceled' errors, particularly after 24+ hours of operation in containerized environments. Root Cause: ----------- Race condition where TWO goroutines were calling stream.Recv() on the same gRPC bidirectional stream concurrently: 1. sendRegistrationSync() started a goroutine that calls stream.Recv() 2. handleIncoming() also calls stream.Recv() in a loop Per gRPC specification, only ONE goroutine can call Recv() on a stream at a time. Concurrent Recv() calls cause undefined behavior, manifesting as 'context canceled' errors and stream corruption. The race occurred during worker reconnection: - Sometimes sendRegistrationSync goroutine read the registration response first (success) - Sometimes handleIncoming read it first, causing sendRegistrationSync to timeout - This left the stream in an inconsistent state, triggering 'context canceled' error - The error triggered rapid reconnection attempts, creating a reconnection storm Why it happened after 24 hours: Container orchestration systems (Docker Swarm/Kubernetes) periodically restart pods. Over time, workers reconnect multiple times. Each reconnection had a chance of hitting the race condition. Eventually the race manifested and caused the connection storm. Changes: -------- weed/worker/client.go: - Start handleIncoming and handleOutgoing goroutines BEFORE sending registration - Use sendRegistration() instead of sendRegistrationSync() - Ensures only ONE goroutine (handleIncoming) calls stream.Recv() - Eliminates race condition entirely weed/admin/dash/worker_grpc_server.go: - Clean up old connection when worker reconnects with same ID - Cancel old connection context to stop its goroutines - Prevents resource leaks and stale connection accumulation Impact: ------- Before: Random 'context canceled' errors during reconnection, rapid reconnection cycles, resource leaks, requires manual restart to recover After: Reliable reconnection, single Recv() goroutine, proper cleanup, stable operation over 24+ hours Testing: -------- Build verified successful with no compilation errors. How to reproduce the bug: 1. Start admin server and worker 2. Restart admin server (simulates container recreation) 3. Worker reconnects 4. Race condition may manifest, causing 'context canceled' error 5. Observe rapid reconnection cycles in logs The fix is backward compatible and requires no configuration changes. * Add MaxConnectionAge to gRPC server for Docker Swarm DNS handling - Configure MaxConnectionAge and MaxConnectionAgeGrace for gRPC server - Expand error detection in shouldInvalidateConnection for better cache invalidation - Add connection lifecycle logging for debugging * Add topology validation and nil-safety checks - Add validation guards in UpdateTopology to prevent invalid updates - Add nil-safety checks in rebuildIndexes - Add GetDiskCount method for diagnostic purposes * Fix worker registration race condition - Reorder goroutine startup in WorkerStream to prevent race conditions - Add defensive cleanup in unregisterWorker with panic-safe channel closing * Add comprehensive topology update logging - Enhance UpdateTopologyInfo with detailed logging of datacenter/node/disk counts - Add metrics logging for topology changes * Add periodic diagnostic status logging - Implement topologyStatusLoop running every 5 minutes - Add logTopologyStatus function reporting system metrics - Run as background goroutine in maintenance manager * Enhance master client connection logging - Add connection timing logs in tryConnectToMaster - Add reconnection attempt counting in KeepConnectedToMaster - Improve diagnostic visibility for connection issues * Remove unused sendRegistrationSync function - Function is no longer called after switching to asynchronous sendRegistration - Contains the problematic concurrent stream.Recv() pattern that caused race conditions - Cleanup as suggested in PR review * Clarify comment for channel closing during disconnection - Improve comment to explain why channels are closed and their effect - Make the code more self-documenting as suggested in PR review * Address code review feedback: refactor and improvements - Extract topology counting logic to shared helper function CountTopologyResources() to eliminate duplication between topology_management.go and maintenance_integration.go - Use gRPC status codes for more robust error detection in shouldInvalidateConnection(), falling back to string matching for transport-level errors - Add recover wrapper for channel close consistency in cleanupStaleConnections() to match unregisterWorker() pattern * Update grpc_client_server.go * Fix data race on lastSeen field access - Add mutex protection around conn.lastSeen = time.Now() in WorkerStream method - Ensures thread-safe access consistent with cleanupStaleConnections * Fix goroutine leaks in worker reconnection logic - Close streamExit in reconnect() before creating new connection - Close streamExit in attemptConnection() when sendRegistration fails - Prevents orphaned handleOutgoing/handleIncoming goroutines from previous connections - Ensures proper cleanup of goroutines competing for shared outgoing channel * Minor cleanup improvements for consistency and clarity - Remove redundant string checks in shouldInvalidateConnection that overlap with gRPC status codes - Add recover block to Stop() method for consistency with other channel close operations - Maintains valuable DNS and transport-specific error detection while eliminating redundancy * Improve topology update error handling - Return descriptive errors instead of silently preserving topology for invalid updates - Change nil topologyInfo case to return 'rejected invalid topology update: nil topologyInfo' - Change empty DataCenterInfos case to return 'rejected invalid topology update: empty DataCenterInfos (had X nodes, Y disks)' - Keep existing glog.Warningf calls but append error details to logs before returning errors - Allows callers to distinguish rejected updates and handle them appropriately * Refactor safe channel closing into helper method - Add safeCloseOutgoingChannel helper method to eliminate code duplication - Replace repeated recover blocks in Stop, unregisterWorker, and cleanupStaleConnections - Improves maintainability and ensures consistent error handling across all channel close operations - Maintains same panic recovery behavior with contextual source identification * Make connection invalidation string matching case-insensitive - Convert error string to lowercase once for all string.Contains checks - Improves robustness by catching error message variations from different sources - Eliminates need for separate 'DNS resolution' and 'dns' checks - Maintains same error detection coverage with better reliability * Clean up warning logs in UpdateTopology to avoid duplicating error text - Remove duplicated error phrases from glog.Warningf messages - Keep concise contextual warnings that don't repeat the fmt.Errorf content - Maintain same error returns for backward compatibility * Add robust validation to prevent topology wipeout during master restart - Reject topology updates with 0 nodes when current topology has nodes - Prevents transient empty topology from overwriting valid state - Improves resilience during master restart scenarios - Maintains backward compatibility for legitimate empty topology updates	2 months ago
chrislu	b7ba6785a2	go fmt	4 months ago
Chris Lu	97f3028782	Clean up logs and deprecated functions (#7339 ) * less logs * fix deprecated grpc.Dial	4 months ago
Chris Lu	0975968e71	admin: Refactor task destination planning (#7063 ) * refactor planning into task detection * refactoring worker tasks * refactor * compiles, but only balance task is registered * compiles, but has nil exception * avoid nil logger * add back ec task * setting ec log directory * implement balance and vacuum tasks * EC tasks will no longer fail with "file not found" errors * Use ReceiveFile API to send locally generated shards * distributing shard files and ecx,ecj,vif files * generate .ecx files correctly * do not mount all possible EC shards (0-13) on every destination * use constants * delete all replicas * rename files * pass in volume size to tasks	6 months ago
Chris Lu	891a2fb6eb	Admin: misc improvements on admin server and workers. EC now works. (#7055 ) * initial design * added simulation as tests * reorganized the codebase to move the simulation framework and tests into their own dedicated package * integration test. ec worker task * remove "enhanced" reference * start master, volume servers, filer Current Status ✅ Master: Healthy and running (port 9333) ✅ Filer: Healthy and running (port 8888) ✅ Volume Servers: All 6 servers running (ports 8080-8085) 🔄 Admin/Workers: Will start when dependencies are ready * generate write load * tasks are assigned * admin start wtih grpc port. worker has its own working directory * Update .gitignore * working worker and admin. Task detection is not working yet. * compiles, detection uses volumeSizeLimitMB from master * compiles * worker retries connecting to admin * build and restart * rendering pending tasks * skip task ID column * sticky worker id * test canScheduleTaskNow * worker reconnect to admin * clean up logs * worker register itself first * worker can run ec work and report status but: 1. one volume should not be repeatedly worked on. 2. ec shards needs to be distributed and source data should be deleted. * move ec task logic * listing ec shards * local copy, ec. Need to distribute. * ec is mostly working now * distribution of ec shards needs improvement * need configuration to enable ec * show ec volumes * interval field UI component * rename * integration test with vauuming * garbage percentage threshold * fix warning * display ec shard sizes * fix ec volumes list * Update ui.go * show default values * ensure correct default value * MaintenanceConfig use ConfigField * use schema defined defaults * config * reduce duplication * refactor to use BaseUIProvider * each task register its schema * checkECEncodingCandidate use ecDetector * use vacuumDetector * use volumeSizeLimitMB * remove remove * remove unused * refactor * use new framework * remove v2 reference * refactor * left menu can scroll now * The maintenance manager was not being initialized when no data directory was configured for persistent storage. * saving config * Update task_config_schema_templ.go * enable/disable tasks * protobuf encoded task configurations * fix system settings * use ui component * remove logs * interface{} Reduction * reduce interface{} * reduce interface{} * avoid from/to map * reduce interface{} * refactor * keep it DRY * added logging * debug messages * debug level * debug * show the log caller line * use configured task policy * log level * handle admin heartbeat response * Update worker.go * fix EC rack and dc count * Report task status to admin server * fix task logging, simplify interface checking, use erasure_coding constants * factor in empty volume server during task planning * volume.list adds disk id * track disk id also * fix locking scheduled and manual scanning * add active topology * simplify task detector * ec task completed, but shards are not showing up * implement ec in ec_typed.go * adjust log level * dedup * implementing ec copying shards and only ecx files * use disk id when distributing ec shards 🎯 Planning: ActiveTopology creates DestinationPlan with specific TargetDisk 📦 Task Creation: maintenance_integration.go creates ECDestination with DiskId 🚀 Task Execution: EC task passes DiskId in VolumeEcShardsCopyRequest 💾 Volume Server: Receives disk_id and stores shards on specific disk (vs.store.Locations[req.DiskId]) 📂 File System: EC shards and metadata land in the exact disk directory planned * Delete original volume from all locations * clean up existing shard locations * local encoding and distributing * Update docker/admin_integration/EC-TESTING-README.md Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> * check volume id range * simplify * fix tests * fix types * clean up logs and tests --------- Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>	7 months ago
Chris Lu	aa66852304	Admin UI add maintenance menu (#6944 ) * add ui for maintenance * valid config loading. fix workers page. * refactor * grpc between admin and workers * add a long-running bidirectional grpc call between admin and worker * use the grpc call to heartbeat * use the grpc call to communicate * worker can remove the http client * admin uses http port + 10000 as its default grpc port * one task one package * handles connection failures gracefully with exponential backoff * grpc with insecure tls * grpc with optional tls * fix detecting tls * change time config from nano seconds to seconds * add tasks with 3 interfaces * compiles reducing hard coded * remove a couple of tasks * remove hard coded references * reduce hard coded values * remove hard coded values * remove hard coded from templ * refactor maintenance package * fix import cycle * simplify * simplify * auto register * auto register factory * auto register task types * self register types * refactor * simplify * remove one task * register ui * lazy init executor factories * use registered task types * DefaultWorkerConfig remove hard coded task types * remove more hard coded * implement get maintenance task * dynamic task configuration * "System Settings" should only have system level settings * adjust menu for tasks * ensure menu not collapsed * render job configuration well * use templ for ui of task configuration * fix ordering * fix bugs * saving duration in seconds * use value and unit for duration * Delete WORKER_REFACTORING_PLAN.md * Delete maintenance.json * Delete custom_worker_example.go * remove address from workers * remove old code from ec task * remove creating collection button * reconnect with exponential backoff * worker use security.toml * start admin server with tls info from security.toml * fix "weed admin" cli description	7 months ago