Agent Fails when DR Crashes a Second Time

[jhkolb]

My bw2 agent crashes when a DR backing an ongoing subscription crashes. The crash occurs when a DR fails, comes back online, the agent reconnects to the DR and reestablishes subscriptions, and then the DR fails a second time.

When the DR first crashes, things look okay, I see things that look like the following:

peerclient.go:212 peer write error: tls: use of closed connection
peerclient.go:157 Attempting to reconnect to peer: 52.53.189.88:4514
peerclient.go:160 Peer reconnected: 52.53.189.88:4514

However, once the DR disconnects a second time, I see this:

peerclient.go:145 PEER CONNECTION to 52.53.189.88:4514: EOF
peerclient.go:157 Attempting to reconnect to peer: 52.53.189.88:4514
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0xe34136]

goroutine 9188 [running]:
github.com/immesys/bw2/api.(*PeerClient).regenSubs.func1(0x0)
	/go/src/github.com/immesys/bw2/api/peerclient.go:129 +0x26
created by github.com/immesys/bw2/api.(*PeerClient).rxloop
	/go/src/github.com/immesys/bw2/api/peerclient.go:153 +0x664
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0xe34136]

goroutine 9189 [running]:
github.com/immesys/bw2/api.(*PeerClient).regenSubs.func1(0x0)
	/go/src/github.com/immesys/bw2/api/peerclient.go:129 +0x26
created by github.com/immesys/bw2/api.(*PeerClient).rxloop
	/go/src/github.com/immesys/bw2/api/peerclient.go:153 +0x664