MongoDB Windows CMD에서 Background 실행하기

Local에서 MongoDB를 개발하다가 보면 다음과 같은 오류가 날 수도 있다.

2021-06-22 16:54:47.086  INFO 7212 --- [           main] org.mongodb.driver.cluster               : No server chosen by com.mongodb.async.client.ClientSessionHelper$1@68868328 from cluster description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, serverDescriptions=[ServerDescription{address=localhost:27017, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
2021-06-22 16:54:48.146  INFO 7212 --- [localhost:27017] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server localhost:27017

com.mongodb.MongoSocketOpenException: Exception opening socket
	at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:67) ~[mongodb-driver-core-3.8.2.jar:na]
	at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:126) ~[mongodb-driver-core-3.8.2.jar:na]
	at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:117) ~[mongodb-driver-core-3.8.2.jar:na]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_291]
Caused by: java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_291]
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:81) ~[na:1.8.0_291]
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476) ~[na:1.8.0_291]
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218) ~[na:1.8.0_291]
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200) ~[na:1.8.0_291]
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162) ~[na:1.8.0_291]
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394) ~[na:1.8.0_291]
	at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_291]
	at com.mongodb.internal.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:64) ~[mongodb-driver-core-3.8.2.jar:na]
	at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:62) ~[mongodb-driver-core-3.8.2.jar:na]
	... 3 common frames omitted

2021-06-22 16:54:48.970  INFO 7212 --- [localhost:27017] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server localhost:27017

 

이 경우는 다음 상황에서 발생한다.

1. 개발 컴퓨터에 MongoDB local 설치 되어있고 Background에서 작동 중에 있음
2. Spring에서 JUnit Test로 embedded MongoDB를 별도 실행해서 Test를 진행하려고 함

Test용 embedded Mongodb는 build.gradle 에 다음 항목이 있고 Test Java 파일에서 Unit Test를 Run하면 발생한다.

testImplementation('de.flapdoodle.embed:de.flapdoodle.embed.mongo')

 

이 상황이 발생하면 windows에서 작동하고 있는 local mongodb가 Process kill나게 된다.

다시 실행 하려고 해도 configuration이 정상 로드 되지 않는다.

C:\Program Files\MongoDB\Server\4.4\bin>mongod.exe
{"t":{"$date":"2021-06-22T16:55:08.694+09:00"},"s":"I",  "c":"CONTROL",  "id":23285,   "ctx":"main","msg":"Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'"}
{"t":{"$date":"2021-06-22T16:55:09.015+09:00"},"s":"W",  "c":"ASIO",     "id":22601,   "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2021-06-22T16:55:09.015+09:00"},"s":"I",  "c":"NETWORK",  "id":4648602, "ctx":"main","msg":"Implicit TCP FastOpen in use."}
{"t":{"$date":"2021-06-22T16:55:09.016+09:00"},"s":"I",  "c":"STORAGE",  "id":4615611, "ctx":"initandlisten","msg":"MongoDB starting","attr":{"pid":9964,"port":27017,"dbPath":"C:/data/db/","architecture":"64-bit","host":"DESKTOP-EQGMFFE"}}
{"t":{"$date":"2021-06-22T16:55:09.016+09:00"},"s":"I",  "c":"CONTROL",  "id":23398,   "ctx":"initandlisten","msg":"Target operating system minimum version","attr":{"targetMinOS":"Windows 7/Windows Server 2008 R2"}}
{"t":{"$date":"2021-06-22T16:55:09.017+09:00"},"s":"I",  "c":"CONTROL",  "id":23403,   "ctx":"initandlisten","msg":"Build Info","attr":{"buildInfo":{"version":"4.4.6","gitVersion":"72e66213c2c3eab37d9358d5e78ad7f5c1d0d0d7","modules":[],"allocator":"tcmalloc","environment":{"distmod":"windows","distarch":"x86_64","target_arch":"x86_64"}}}}
{"t":{"$date":"2021-06-22T16:55:09.017+09:00"},"s":"I",  "c":"CONTROL",  "id":51765,   "ctx":"initandlisten","msg":"Operating System","attr":{"os":{"name":"Microsoft Windows 10","version":"10.0 (build 19042)"}}}
{"t":{"$date":"2021-06-22T16:55:09.017+09:00"},"s":"I",  "c":"CONTROL",  "id":21951,   "ctx":"initandlisten","msg":"Options set by command line","attr":{"options":{}}}
{"t":{"$date":"2021-06-22T16:55:09.018+09:00"},"s":"E",  "c":"STORAGE",  "id":20557,   "ctx":"initandlisten","msg":"DBException in initAndListen, terminating","attr":{"error":"NonExistentPath: Data directory C:\\data\\db\\ not found. Create the missing directory or specify another path using (1) the --dbpath command line option, or (2) by adding the 'storage.dbPath' option in the configuration file."}}
{"t":{"$date":"2021-06-22T16:55:09.018+09:00"},"s":"I",  "c":"REPL",     "id":4784900, "ctx":"initandlisten","msg":"Stepping down the ReplicationCoordinator for shutdown","attr":{"waitTimeMillis":10000}}
{"t":{"$date":"2021-06-22T16:55:09.018+09:00"},"s":"I",  "c":"COMMAND",  "id":4784901, "ctx":"initandlisten","msg":"Shutting down the MirrorMaestro"}
{"t":{"$date":"2021-06-22T16:55:09.018+09:00"},"s":"I",  "c":"SHARDING", "id":4784902, "ctx":"initandlisten","msg":"Shutting down the WaitForMajorityService"}
{"t":{"$date":"2021-06-22T16:55:09.018+09:00"},"s":"I",  "c":"NETWORK",  "id":20562,   "ctx":"initandlisten","msg":"Shutdown: going to close listening sockets"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"NETWORK",  "id":4784905, "ctx":"initandlisten","msg":"Shutting down the global connection pool"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"STORAGE",  "id":4784906, "ctx":"initandlisten","msg":"Shutting down the FlowControlTicketholder"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"-",        "id":20520,   "ctx":"initandlisten","msg":"Stopping further Flow Control ticket acquisitions."}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"NETWORK",  "id":4784918, "ctx":"initandlisten","msg":"Shutting down the ReplicaSetMonitor"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"SHARDING", "id":4784921, "ctx":"initandlisten","msg":"Shutting down the MigrationUtilExecutor"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"CONTROL",  "id":4784925, "ctx":"initandlisten","msg":"Shutting down free monitoring"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"STORAGE",  "id":4784927, "ctx":"initandlisten","msg":"Shutting down the HealthLog"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"STORAGE",  "id":4784929, "ctx":"initandlisten","msg":"Acquiring the global lock for shutdown"}
{"t":{"$date":"2021-06-22T16:55:09.019+09:00"},"s":"I",  "c":"-",        "id":4784931, "ctx":"initandlisten","msg":"Dropping the scope cache for shutdown"}
{"t":{"$date":"2021-06-22T16:55:09.020+09:00"},"s":"I",  "c":"FTDC",     "id":4784926, "ctx":"initandlisten","msg":"Shutting down full-time data capture"}
{"t":{"$date":"2021-06-22T16:55:09.020+09:00"},"s":"I",  "c":"CONTROL",  "id":20565,   "ctx":"initandlisten","msg":"Now exiting"}
{"t":{"$date":"2021-06-22T16:55:09.020+09:00"},"s":"I",  "c":"CONTROL",  "id":23138,   "ctx":"initandlisten","msg":"Shutting down","attr":{"exitCode":100}}

왜 이런 현상이 일어나는지 보면,

"error":"NonExistentPath: Data directory C:\\data\\db\\ not found.

Data Path가 data 디렉토리를 찾기 때문이다.

하지만 Default MongoDB Configuration은

dbPath: C:\Program Files\MongoDB\Server\4.4\data

로 지정하고 있다.

해당 cfg 파일은 다음에 위치 한다.

즉, mongod를 실행할 때 cfs를 로드 해야 한다.

다음과 같이 실행해 주면 default local cfg를 로드해서 실행이 가능하다.

start /b mongod.exe --config mongod.cfg

여기서 start /b를 빼고 하면 CMD에서 Blocking Mode로 작동하게 된다.