lspgn commented on issue #5695: Go: Segfault on messageId serialize after getting it from producer URL: https://github.com/apache/pulsar/issues/5695#issuecomment-561032305 @wolfstudy sorry to re-open (was on vacations), I ran tests with the example file: I'm getting the following: It rarely manages to display a message Id (maybe a race condition?), most of the time, it just panic at the first one. ``` The message Id value is: [(4294967295,140734859843417,57,0)] The message Id value is: [(75552472,0,2433,36)] fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x470fafa] runtime stack: runtime.throw(0x434b363, 0x2a) /usr/local/Cellar/go/1.13.3/libexec/src/runtime/panic.go:774 +0x72 runtime.sigpanic() /usr/local/Cellar/go/1.13.3/libexec/src/runtime/signal_unix.go:378 +0x47c goroutine 1 [syscall]: runtime.cgocall(0x42932a0, 0xc000109800, 0x40) /usr/local/Cellar/go/1.13.3/libexec/src/runtime/cgocall.go:128 +0x5b fp=0xc0001097d0 sp=0xc000109798 pc=0x400519b github.com/apache/pulsar/pulsar-client-go/pulsar._Cfunc_pulsar_message_id_str(0x6e003b0, 0x0) _cgo_gotypes.go:1279 +0x4a fp=0xc000109800 sp=0xc0001097d0 pc=0x4279c3a github.com/apache/pulsar/pulsar-client-go/pulsar.(*messageID).String.func1(0xc0000a8080, 0x4037e80) /Users/me/go/pkg/mod/github.com/apache/pulsar/pulsar-client-go@v0.0.0-20191203033040-9137065ffcac/pulsar/c_message.go:199 +0x5e fp=0xc000109840 sp=0xc000109800 pc=0x428906e github.com/apache/pulsar/pulsar-client-go/pulsar.(*messageID).String(0xc0000a8080, 0x0, 0x0) /Users/me/go/pkg/mod/github.com/apache/pulsar/pulsar-client-go@v0.0.0-20191203033040-9137065ffcac/pulsar/c_message.go:199 +0x37 fp=0xc0001098a8 sp=0xc000109840 pc=0x4280ba7 fmt.(*pp).handleMethods(0xc000120000, 0x76, 0x1) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:630 +0x302 fp=0xc000109ab8 sp=0xc0001098a8 pc=0x40bc262 fmt.(*pp).printArg(0xc000120000, 0x42e3bc0, 0xc0000a8080, 0xc000000076) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:713 +0x206 fp=0xc000109b50 sp=0xc000109ab8 pc=0x40bc826 fmt.(*pp).doPrintf(0xc000120000, 0x4346be0, 0x1f, 0xc000109e20, 0x1, 0x1) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:1030 +0x15b fp=0xc000109c38 sp=0xc000109b50 pc=0x40c01eb fmt.Fprintf(0x43a5ce0, 0xc0000a8008, 0x4346be0, 0x1f, 0xc000109e20, 0x1, 0x1, 0x0, 0x0, 0x0) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:204 +0x72 fp=0xc000109ca0 sp=0xc000109c38 pc=0x40b9092 fmt.Printf(...) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:213 main.main() /Users/me/repos/pulsar-test/producer.go:61 +0x2ee fp=0xc000109f60 sp=0xc000109ca0 pc=0x4291d1e runtime.main() /usr/local/Cellar/go/1.13.3/libexec/src/runtime/proc.go:203 +0x21e fp=0xc000109fe0 sp=0xc000109f60 pc=0x4030cae runtime.goexit() /usr/local/Cellar/go/1.13.3/libexec/src/runtime/asm_amd64.s:1357 +0x1 fp=0xc000109fe8 sp=0xc000109fe0 pc=0x405b561 exit status 2 ``` ``` The message Id value is: [(75552472,0,2433,36)] fatal error: unexpected signal during runtime execution [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x470fafa] runtime stack: runtime.throw(0x434b363, 0x2a) /usr/local/Cellar/go/1.13.3/libexec/src/runtime/panic.go:774 +0x72 runtime.sigpanic() /usr/local/Cellar/go/1.13.3/libexec/src/runtime/signal_unix.go:378 +0x47c goroutine 1 [syscall]: runtime.cgocall(0x42932a0, 0xc000109800, 0xa0) /usr/local/Cellar/go/1.13.3/libexec/src/runtime/cgocall.go:128 +0x5b fp=0xc0001097d0 sp=0xc000109798 pc=0x400519b github.com/apache/pulsar/pulsar-client-go/pulsar._Cfunc_pulsar_message_id_str(0x7001240, 0x0) _cgo_gotypes.go:1279 +0x4a fp=0xc000109800 sp=0xc0001097d0 pc=0x4279c3a github.com/apache/pulsar/pulsar-client-go/pulsar.(*messageID).String.func1(0xc0000a8078, 0x4037e80) /Users/me/go/pkg/mod/github.com/apache/pulsar/pulsar-client-go@v0.0.0-20191203033040-9137065ffcac/pulsar/c_message.go:199 +0x5e fp=0xc000109840 sp=0xc000109800 pc=0x428906e github.com/apache/pulsar/pulsar-client-go/pulsar.(*messageID).String(0xc0000a8078, 0x0, 0x0) /Users/me/go/pkg/mod/github.com/apache/pulsar/pulsar-client-go@v0.0.0-20191203033040-9137065ffcac/pulsar/c_message.go:199 +0x37 fp=0xc0001098a8 sp=0xc000109840 pc=0x4280ba7 fmt.(*pp).handleMethods(0xc00011e000, 0x76, 0x1) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:630 +0x302 fp=0xc000109ab8 sp=0xc0001098a8 pc=0x40bc262 fmt.(*pp).printArg(0xc00011e000, 0x42e3bc0, 0xc0000a8078, 0x76) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:713 +0x206 fp=0xc000109b50 sp=0xc000109ab8 pc=0x40bc826 fmt.(*pp).doPrintf(0xc00011e000, 0x4346be0, 0x1f, 0xc000109e20, 0x1, 0x1) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:1030 +0x15b fp=0xc000109c38 sp=0xc000109b50 pc=0x40c01eb fmt.Fprintf(0x43a5ce0, 0xc0000a8008, 0x4346be0, 0x1f, 0xc000109e20, 0x1, 0x1, 0x0, 0x0, 0x0) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:204 +0x72 fp=0xc000109ca0 sp=0xc000109c38 pc=0x40b9092 fmt.Printf(...) /usr/local/Cellar/go/1.13.3/libexec/src/fmt/print.go:213 main.main() /Users/me/repos/pulsar-test/producer.go:63 +0x2ee fp=0xc000109f60 sp=0xc000109ca0 pc=0x4291d1e runtime.main() /usr/local/Cellar/go/1.13.3/libexec/src/runtime/proc.go:203 +0x21e fp=0xc000109fe0 sp=0xc000109f60 pc=0x4030cae runtime.goexit() /usr/local/Cellar/go/1.13.3/libexec/src/runtime/asm_amd64.s:1357 +0x1 fp=0xc000109fe8 sp=0xc000109fe0 pc=0x405b561 exit status 2 ``` I'm trying to debug it. Issue seems to be there: https://github.com/apache/pulsar/blob/be6a102511560349701dbe6b83fabf831dc81340/pulsar-client-go/pulsar/c_message.go#L199 Which in the library is the following: https://github.com/apache/pulsar/blame/master/pulsar-client-cpp/lib/c/c_MessageId.cc#L62-L65 Not very familiar with the C build but will try to have verbose debug. (managed to reproduce the [make from Homebrew](https://github.com/Homebrew/homebrew-core/blob/master/Formula/libpulsar.rb)) ``` cmake . \ -DBUILD_TESTS=OFF \ -DBUILD_PYTHON_WRAPPER=OFF \ -DBoost_INCLUDE_DIRS=/usr/local/Cellar/boost/1.71.0/include/ \ -DProtobuf_INCLUDE_DIR=/usr/local/Cellar/protobuf/3.10.0/include \ -DProtobuf_LIBRARIES=/usr/local/Cellar/protobuf/3.10.0/lib/libprotobuf.dylib ```
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