Possible failure to detect etcd lease destruction

[connor4312]

I noticed this morning that etcd lost the lease used for service discovery on my local instance of our chat server. Chat's last report of the lease being lost and reestablished yesterday. Etcd was empty and when sending SIGINT (which tears down the lease in a graceful shutdown) it errored that the lease was not found in etcd. Seems like it never detected that yesterday's lease was timed out.

{"name":"chat","hostname":"hera.peet.io","pid":18186,"level":30,"err":{"message":"Lease 7587822556486125056 is expired or revoked","name":"Error","stack":"Error: Lease 7587822556486125056 is expired or revoked\n    at EtcdLeaseInvalidError (/Users/copeet/Github/chat/node_modules/etcd3/lib/src/errors.js:71:9)\n    at ClientDuplexStream.stream.on.res (/Users/copeet/Github/chat/node_modules/etcd3/lib/src/lease.js:158:33)\n    at emitOne (events.js:96:13)\n    at ClientDuplexStream.emit (events.js:188:7)\n    at readableAddChunk (_stream_readable.js:176:18)\n    at ClientDuplexStream.Readable.push (_stream_readable.js:134:10)\n    at readCallback (/Users/copeet/Github/chat/node_modules/etcd3/node_modules/grpc/src/node/src/client.js:245:14)"},"msg":"Etcd3 lease lost, attempting to re-grant","time":"2017-06-08T17:22:58.238Z","v":0}
{"name":"chat","hostname":"hera.peet.io","pid":18186,"level":30,"msg":"Ectd3 lease re-established","time":"2017-06-08T17:22:58.290Z","v":0}
^CUncaught error: EtcdError: etcdserver: requested lease not found
    at /Users/copeet/Github/chat/node_modules/etcd3/node_modules/grpc/src/node/src/client.js:434:17
Uncaught error: EtcdError: etcdserver: requested lease not found
    at /Users/copeet/Github/chat/node_modules/etcd3/node_modules/grpc/src/node/src/client.js:434:17
Failed to handle shutdown: EtcdError: etcdserver: requested lease not found
    at /Users/copeet/Github/chat/node_modules/etcd3/node_modules/grpc/src/node/src/client.js:434:17
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! chat@1.0.0 start: `tsc && node dist/index`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the chat@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/copeet/.npm/_logs/2017-06-09T16_09_43_535Z-debug.log