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Panic with DBus #242

@turb

Description

@turb

Since we activated systemd collector, it's the second time (four days after the first one) the exporter fails with panic, twice on the same host:

panic: send on closed channel

goroutine 672945 [running]:
panic(0x8bf8e0, 0xc820201ed0)
        /usr/lib/go/src/runtime/panic.go:464 +0x3e6
github.com/godbus/dbus.(*Conn).inWorker(0xc820158360)
        /build/prometheus-node-exporter-0.12.0+ds+really0.12.0/obj-x86_64-linux-gnu/src/github.com/godbus/dbus/conn.go:342 +0x11c3
created by github.com/godbus/dbus.(*Conn).Auth
        /build/prometheus-node-exporter-0.12.0+ds+really0.12.0/obj-x86_64-linux-gnu/src/github.com/godbus/dbus/auth.go:118 +0xf3d

We use the Debian-packaged exporter.

Starting again the exporter solves it.

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