Github user robertkowalski commented on the pull request:
https://github.com/apache/couchdb-nmo/pull/2#issuecomment-137766670
if you ask isonline to see if a non existing cluster is online it crashes,
+1 after checking for it with an error of error.type `EUSAGE`
```
(17:23:07) [robert@tequila-work] ~/apache/couchdb-nmo (pr/2) $
./bin/nmo-cli.js isonline notexist
ERR! Object.keys called on non-object
ERR! TypeError: Object.keys called on non-object
ERR! at Function.keys (native)
ERR! at getClusterUrls
(/Users/robert/apache/couchdb-nmo/lib/isonline.js:76:17)
ERR! at /Users/robert/apache/couchdb-nmo/lib/isonline.js:50:14
ERR! at tryCatcher
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/util.js:24:31)
ERR! at Promise._resolveFromResolver
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/promise.js:427:31)
ERR! at new Promise
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/promise.js:53:37)
ERR! at isOnlineCli
(/Users/robert/apache/couchdb-nmo/lib/isonline.js:41:10)
ERR! at /Users/robert/apache/couchdb-nmo/bin/nmo-cli.js:34:6
ERR! at tryCatcher
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/util.js:24:31)
ERR! at Promise._settlePromiseFromHandler
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/promise.js:454:31)
ERR! at Promise._settlePromiseAt
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/promise.js:530:18)
ERR! at Promise._settlePromises
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/promise.js:646:14)
ERR! at Async._drainQueue
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/async.js:177:16)
ERR! at Async._drainQueues
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/async.js:187:10)
ERR! at Immediate.Async.drainQueues [as _onImmediate]
(/Users/robert/apache/couchdb-nmo/node_modules/bluebird/js/main/async.js:15:14)
ERR! at processImmediate [as _immediateCallback] (timers.js:358:17)
ERR!
ERR!
ERR! nmo: 1.0.1 node: v0.12.2
ERR! please open an issue including this log on
https://github.com/robertkowalski/nmo/issues
```
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