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Type:
Bug
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Resolution: Gone away
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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I got the following panic when restarting the MongoDB server with an open change stream. I'm using the master branch of the driver and MongoDB 4.0.4.
You can run the following example yourself and restart the server to get the crash:
https://github.com/256dpi/fire/tree/official-driver/example
panic: runtime error: invalid memory address or nil pointer dereferencepanic: runtime error: invalid memory address or nil pointer dereference[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x149cc39] goroutine 36 [running]:go.mongodb.org/mongo-driver/x/mongo/driver/topology.newConnection(0x184f4a0, 0xc0000c2048, 0xc0002e0280, 0xf, 0xc0002e6050, 0x2, 0x2, 0x5509850, 0xc00043e300, 0xc000168e00) /Users/256dpi/Development/Go/pkg/mod/go.mongodb.org/mongo-driver@v1.0.1-0.20190520233249-537a129acde0/x/mongo/driver/topology/connection.go:101 +0x739go.mongodb.org/mongo-driver/x/mongo/driver/topology.(*pool).get(0xc0000ac120, 0x184f4a0, 0xc0000c2048, 0x1, 0x0, 0x0) /Users/256dpi/Development/Go/pkg/mod/go.mongodb.org/mongo-driver@v1.0.1-0.20190520233249-537a129acde0/x/mongo/driver/topology/pool.go:157 +0xf6go.mongodb.org/mongo-driver/x/mongo/driver/topology.(*Server).ConnectionLegacy(0xc0002ee000, 0x184f4a0, 0xc0000c2048, 0xa7000000, 0x2540be400, 0x0, 0x0) /Users/256dpi/Development/Go/pkg/mod/go.mongodb.org/mongo-driver@v1.0.1-0.20190520233249-537a129acde0/x/mongo/driver/topology/server.go:244 +0xb8go.mongodb.org/mongo-driver/x/mongo/driverlegacy.KillCursors(0x184f4a0, 0xc0000c2048, 0xc0000c78a0, 0xc, 0xc0000c78ad, 0x4, 0x1842c40, 0xc0002ee000, 0x4b861a30c0352624, 0x0, ...) /Users/256dpi/Development/Go/pkg/mod/go.mongodb.org/mongo-driver@v1.0.1-0.20190520233249-537a129acde0/x/mongo/driverlegacy/kill_cursors.go:36 +0x2b0go.mongodb.org/mongo-driver/mongo.(*ChangeStream).loopNext(0xc000360140, 0x184f4a0, 0xc0000c2048) /Users/256dpi/Development/Go/pkg/mod/go.mongodb.org/mongo-driver@v1.0.1-0.20190520233249-537a129acde0/mongo/change_stream.go:558 +0x35bgo.mongodb.org/mongo-driver/mongo.(*ChangeStream).Next(0xc000360140, 0x0, 0x0, 0x0) /Users/256dpi/Development/Go/pkg/mod/go.mongodb.org/mongo-driver@v1.0.1-0.20190520233249-537a129acde0/mongo/change_stream.go:507 +0x169github.com/256dpi/fire/coal.(*Stream).tail(0xc0000c4460, 0xc0000b73b0, 0xc000169fb0, 0x0, 0x0) /Users/256dpi/Development/GitHub/256dpi/fire/coal/stream.go:166 +0x27agithub.com/256dpi/fire/coal.(*Stream).open(0xc0000c4460) /Users/256dpi/Development/GitHub/256dpi/fire/coal/stream.go:122 +0xc3created by github.com/256dpi/fire/coal.OpenStream /Users/256dpi/Development/GitHub/256dpi/fire/coal/stream.go:76 +0xc1