$ mongo /songza
MongoDB shell version: 2.2.1
connecting to: /songza
Wed Dec 26 04:14:09 Assertion: 13110:HostAndPort: host is empty
0x6073f1 0x5d1aa9 0x4e7a79 0x5b6262 0x6aa5ac 0x6aaec8 0x69e4e7 0x6aa13f 0x668e46 0x668ec2 0x66a2ce 0x5cbcc4 0x4b5e09 0x5b09ad 0x4a406b 0x4a67e6 0x7ff9a08f7c4d 0x49f669
mongo(_ZN5mongo15printStackTraceERSo+0x21) [0x6073f1]
mongo(_ZN5mongo11msgassertedEiPKc+0x99) [0x5d1aa9]
mongo(_ZN5mongo16ConnectionString5parseERKSsRSs+0x3c9) [0x4e7a79]
mongo(ZN5mongo26mongo_external_constructorEP9JSContextP8JSObjectjPlS4+0x132) [0x5b6262]
mongo(js_Invoke+0x40c) [0x6aa5ac]
mongo(js_InvokeConstructor+0x108) [0x6aaec8]
mongo(js_Interpret+0x37c7) [0x69e4e7]
mongo(js_Execute+0x36f) [0x6aa13f]
mongo(JS_EvaluateUCScriptForPrincipals+0x66) [0x668e46]
mongo(JS_EvaluateUCScript+0x22) [0x668ec2]
mongo(JS_EvaluateScript+0x6e) [0x66a2ce]
mongo(_ZN5mongo7SMScope4execERKNS_10StringDataERKSsbbbi+0x144) [0x5cbcc4]
mongo(_ZN5mongo11shell_utils9initScopeERNS_5ScopeE+0x1e9) [0x4b5e09]
mongo(_ZN5mongo12ScriptEngine8newScopeEv+0x2d) [0x5b09ad]
mongo(_Z5_mainiPPc+0x1d1b) [0x4a406b]
mongo(main+0x26) [0x4a67e6]
/lib/libc.so.6(__libc_start_main+0xfd) [0x7ff9a08f7c4d]
mongo(__gxx_personality_v0+0x2a1) [0x49f669]
Wed Dec 26 04:14:09 Error: HostAndPort: host is empty src/mongo/shell/mongo.js:93
exception: connect failed