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[FIXED] Data races websocket/shutdown, DisconnectClientByID and LDMCl…
…ientByID (#5398) Saw a data race in Travis during a websocket test during shutdown: ``` ================== WARNING: DATA RACE Write at 0x00c004430618 by goroutine 112330: github.com/nats-io/nats-server/v2/server.(*Server).Shutdown() /home/travis/gopath/src/github.com/nats-io/nats-server/server/server.go:2527 +0x87e github.com/nats-io/nats-server/v2/server.TestWSTLSConnection.deferwrap1() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket_test.go:2223 +0x33 runtime.deferreturn() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/runtime/panic.go:602 +0x5d testing.tRunner() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1689 +0x21e testing.(*T).Run.gowrap1() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1742 +0x44 Previous read at 0x00c004430618 by goroutine 112339: github.com/nats-io/nats-server/v2/server.(*client).generateClientInfoJSON() /home/travis/gopath/src/github.com/nats-io/nats-server/server/client.go:2389 +0x406 github.com/nats-io/nats-server/v2/server.(*Server).createWSClient() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket.go:1280 +0xb24 github.com/nats-io/nats-server/v2/server.(*Server).startWebsocketServer.func1() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket.go:1184 +0x1db net/http.HandlerFunc.ServeHTTP() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:2166 +0x47 net/http.(*ServeMux).ServeHTTP() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:2683 +0x1ef net/http.serverHandler.ServeHTTP() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:3137 +0x2a1 net/http.(*conn).serve() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:2039 +0x13c4 net/http.(*Server).Serve.gowrap3() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:3285 +0x4f Goroutine 112330 (running) created at: testing.(*T).Run() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1742 +0x825 testing.runTests.func1() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:2161 +0x85 testing.tRunner() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1689 +0x21e testing.runTests() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:2159 +0x8be testing.(*M).Run() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:2027 +0xf17 github.com/nats-io/nats-server/v2/server.TestMain() /home/travis/gopath/src/github.com/nats-io/nats-server/server/sublist_test.go:1602 +0x416 main.main() _testmain.go:2281 +0x2d4 Goroutine 112339 (running) created at: net/http.(*Server).Serve() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:3285 +0x8ec github.com/nats-io/nats-server/v2/server.(*Server).startWebsocketServer.func2() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket.go:1208 +0x5b ================== ================== WARNING: DATA RACE Write at 0x00c004430620 by goroutine 112330: github.com/nats-io/nats-server/v2/server.(*Server).Shutdown() /home/travis/gopath/src/github.com/nats-io/nats-server/server/server.go:2528 +0x8c4 github.com/nats-io/nats-server/v2/server.TestWSTLSConnection.deferwrap1() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket_test.go:2223 +0x33 runtime.deferreturn() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/runtime/panic.go:602 +0x5d testing.tRunner() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1689 +0x21e testing.(*T).Run.gowrap1() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1742 +0x44 Previous read at 0x00c004430620 by goroutine 112339: github.com/nats-io/nats-server/v2/server.(*client).generateClientInfoJSON() /home/travis/gopath/src/github.com/nats-io/nats-server/server/client.go:2394 +0x506 github.com/nats-io/nats-server/v2/server.(*Server).createWSClient() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket.go:1280 +0xb24 github.com/nats-io/nats-server/v2/server.(*Server).startWebsocketServer.func1() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket.go:1184 +0x1db net/http.HandlerFunc.ServeHTTP() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:2166 +0x47 net/http.(*ServeMux).ServeHTTP() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:2683 +0x1ef net/http.serverHandler.ServeHTTP() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:3137 +0x2a1 net/http.(*conn).serve() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:2039 +0x13c4 net/http.(*Server).Serve.gowrap3() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:3285 +0x4f Goroutine 112330 (running) created at: testing.(*T).Run() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1742 +0x825 testing.runTests.func1() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:2161 +0x85 testing.tRunner() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:1689 +0x21e testing.runTests() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:2159 +0x8be testing.(*M).Run() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/testing/testing.go:2027 +0xf17 github.com/nats-io/nats-server/v2/server.TestMain() /home/travis/gopath/src/github.com/nats-io/nats-server/server/sublist_test.go:1602 +0x416 main.main() _testmain.go:2281 +0x2d4 Goroutine 112339 (running) created at: net/http.(*Server).Serve() /home/travis/.gimme/versions/go1.22.2.linux.amd64/src/net/http/server.go:3285 +0x8ec github.com/nats-io/nats-server/v2/server.(*Server).startWebsocketServer.func2() /home/travis/gopath/src/github.com/nats-io/nats-server/server/websocket.go:1208 +0x5b ================== ``` Then from code inspection, also saw possible data races in DisconnectClientByID and LDMClientByID so added to the test `TestServerEventsLDMKick` and saw those: ``` ================== WARNING: DATA RACE Write at 0x00c000099320 by goroutine 491: runtime.mapaccess2_fast64() /usr/local/go/src/runtime/map_fast64.go:53 +0x1cc github.com/nats-io/nats-server/v2/server.(*Server).createClientEx() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3191 +0x9cc github.com/nats-io/nats-server/v2/server.(*Server).createClient() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3064 +0x40 github.com/nats-io/nats-server/v2/server.(*Server).AcceptLoop.func2() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:2682 +0x18 github.com/nats-io/nats-server/v2/server.(*Server).acceptConnections.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:2734 +0x70 github.com/nats-io/nats-server/v2/server.(*Server).startGoRoutine.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3785 +0x58 Previous read at 0x00c000099320 by goroutine 473: runtime.evacuate_fast32() /usr/local/go/src/runtime/map_fast32.go:374 +0x38c github.com/nats-io/nats-server/v2/server.(*Server).LDMClientByID() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:4457 +0x208 github.com/nats-io/nats-server/v2/server.(*Server).ldmClient.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:2823 +0x44 github.com/nats-io/nats-server/v2/server.(*Server).zReq() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:1935 +0x1bc github.com/nats-io/nats-server/v2/server.(*Server).ldmClient() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:2822 +0x230 github.com/nats-io/nats-server/v2/server.(*Server).ldmClient-fm() <autogenerated>:1 +0xa0 github.com/nats-io/nats-server/v2/server.(*Server).internalReceiveLoop() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:424 +0x380 github.com/nats-io/nats-server/v2/server.(*Server).setSystemAccount.func5() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:1755 +0x34 Goroutine 491 (running) created at: github.com/nats-io/nats-server/v2/server.(*Server).startGoRoutine() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3783 +0x160 github.com/nats-io/nats-server/v2/server.(*Server).acceptConnections() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:2732 +0x154 github.com/nats-io/nats-server/v2/server.(*Server).AcceptLoop.func9() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:2682 +0x70 Goroutine 473 (running) created at: github.com/nats-io/nats-server/v2/server.(*Server).setSystemAccount() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:1755 +0x654 github.com/nats-io/nats-server/v2/server.TestServerEventsLDMKick() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events_test.go:3433 +0xc4 testing.tRunner() /usr/local/go/src/testing/testing.go:1595 +0x1b0 testing.(*T).Run.func1() /usr/local/go/src/testing/testing.go:1648 +0x40 ================== ``` ``` ================== WARNING: DATA RACE Write at 0x00c00015d7a0 by goroutine 3115: runtime.mapassign_fast64ptr() /usr/local/go/src/runtime/map_fast64.go:183 +0x35c github.com/nats-io/nats-server/v2/server.(*Server).removeClient() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3474 +0x114 github.com/nats-io/nats-server/v2/server.(*client).closeConnection() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/client.go:5468 +0x3d4 github.com/nats-io/nats-server/v2/server.(*client).authViolation() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/client.go:2214 +0x4e8 github.com/nats-io/nats-server/v2/server.(*client).processConnect() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/client.go:2104 +0xbcc github.com/nats-io/nats-server/v2/server.(*client).parse() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/parser.go:942 +0xe90 github.com/nats-io/nats-server/v2/server.(*client).readLoop() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/client.go:1388 +0x13a4 github.com/nats-io/nats-server/v2/server.(*Server).createClientEx.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3300 +0x50 github.com/nats-io/nats-server/v2/server.(*Server).startGoRoutine.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3785 +0x58 Previous read at 0x00c00015d7a0 by goroutine 3096: runtime.evacuate_fast32() /usr/local/go/src/runtime/map_fast32.go:374 +0x38c github.com/nats-io/nats-server/v2/server.(*Server).DisconnectClientByID() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:4444 +0x4c github.com/nats-io/nats-server/v2/server.(*Server).kickClient.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:2805 +0x44 github.com/nats-io/nats-server/v2/server.(*Server).zReq() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:1935 +0x1bc github.com/nats-io/nats-server/v2/server.(*Server).kickClient() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:2804 +0x230 github.com/nats-io/nats-server/v2/server.(*Server).kickClient-fm() <autogenerated>:1 +0xa0 github.com/nats-io/nats-server/v2/server.(*Server).internalReceiveLoop() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events.go:424 +0x380 github.com/nats-io/nats-server/v2/server.(*Server).setSystemAccount.func5() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:1755 +0x34 Goroutine 3115 (running) created at: github.com/nats-io/nats-server/v2/server.(*Server).startGoRoutine() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3783 +0x160 github.com/nats-io/nats-server/v2/server.(*Server).createClientEx() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3300 +0x13e4 github.com/nats-io/nats-server/v2/server.(*Server).createClient() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3064 +0x40 github.com/nats-io/nats-server/v2/server.(*Server).AcceptLoop.func2() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:2682 +0x18 github.com/nats-io/nats-server/v2/server.(*Server).acceptConnections.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:2734 +0x70 github.com/nats-io/nats-server/v2/server.(*Server).startGoRoutine.func1() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:3785 +0x58 Goroutine 3096 (running) created at: github.com/nats-io/nats-server/v2/server.(*Server).setSystemAccount() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/server.go:1755 +0x654 github.com/nats-io/nats-server/v2/server.TestServerEventsLDMKick() /Users/ivan/dev/go/src/github.com/nats-io/nats-server/server/events_test.go:3433 +0xc4 testing.tRunner() /usr/local/go/src/testing/testing.go:1595 +0x1b0 testing.(*T).Run.func1() /usr/local/go/src/testing/testing.go:1648 +0x40 ================== ``` Signed-off-by: Ivan Kozlovic <[email protected]>
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