{"id":5432,"date":"2018-06-29T01:23:36","date_gmt":"2018-06-29T08:23:36","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=5432"},"modified":"2018-06-29T01:23:36","modified_gmt":"2018-06-29T08:23:36","slug":"inside-the-java-sdk-connection-management","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/inside-the-java-sdk-connection-management\/","title":{"rendered":"Java SDK \ub0b4\ubd80: \uc5f0\uacb0 \uad00\ub9ac"},"content":{"rendered":"<p>\uc774\ubc88 '\uc790\ubc14 SDK \ub0b4\ubd80'\uc758 \ub450 \ubc88\uc9f8 \ud3b8\uc5d0\uc11c\ub294 SDK\uac00 \ub2e4\uc591\ud55c \ub178\ub4dc\uc640 \uc11c\ube44\uc2a4\uc5d0 \ub300\ud55c \uc18c\ucf13\uc744 \uad00\ub9ac\ud558\uace0 \ud480\ub9c1\ud558\ub294 \ubc29\ubc95\uc744 \uc790\uc138\ud788 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uad81\uadf9\uc801\uc73c\ub85c \ubc18\ub4dc\uc2dc \ub530\ub77c\uc57c \ud560 \ud544\uc694\ub294 \uc5c6\uc9c0\ub9cc, \uccab \ubc88\uc9f8 \ud3ec\uc2a4\ud305\uc744 \ud655\uc778\ud558\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4. <a href=\"https:\/\/www.couchbase.com\/blog\/ko\/inside-the-java-sdk-bootstrap\/\">\ubd80\ud2b8\uc2a4\ud2b8\ub7a9\u00a0<\/a>\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\uc785\ub2c8\ub2e4.<\/p>\n<p>\uc774 \uac8c\uc2dc\ubb3c\uc740 Java SDK 2.5.9 \/ 2.6.0 \ub9b4\ub9ac\uc2a4\ub97c \uc5fc\ub450\uc5d0 \ub450\uace0 \uc791\uc131\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \uc0c1\ud669\uc774 \ubc14\ub014 \uc218 \uc788\uc9c0\ub9cc \uc804\ubc18\uc801\uc778 \uc811\uadfc \ubc29\uc2dd\uc740 \uac70\uc758 \ub3d9\uc77c\ud558\uac8c \uc720\uc9c0\ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p>OSI \ubc0f TCP \ubaa8\ub378\uc758 \uc815\uc2e0\uc5d0 \ub530\ub77c SDK \uc5f0\uacb0 \uc2a4\ud0dd\uc744 \ub098\ud0c0\ub0b4\ub294 3\uacc4\uce35 \ubaa8\ub378\uc744 \uc81c\uc548\ud569\ub2c8\ub2e4:<\/p>\n<pre class=\"lang:default decode:true\">+-----------------+\r\n| Service Layer   |\r\n+-----------------+\r\n| Endpoint Layer  |\r\n+-----------------+\r\n| Channel Layer   |\r\n+-----------------+<\/pre>\n<p>\uc0c1\uc704 \ub808\ubca8\uc740 \ud558\uc704 \ub808\ubca8 \uc704\uc5d0 \uad6c\ucd95\ub418\ubbc0\ub85c \ucc44\ub110 \ub808\uc774\uc5b4\ubd80\ud130 \uc2dc\uc791\ud558\uc5ec \uc2a4\ud0dd\uc744 \uc313\uc544 \uc62c\ub9ac\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\ucc44\ub110 \ub808\uc774\uc5b4<\/h2>\n<p>\ucc44\ub110 \uacc4\uce35\uc740 SDK\uac00 \ub124\ud2b8\uc6cc\ud0b9\uc744 \ub2e4\ub8e8\ub294 \uac00\uc7a5 \ub0ae\uc740 \uc218\uc900\uc774\uba70, \ub2e4\uc74c\uacfc \uac19\uc740 \uc6b0\uc218\ud55c \uc644\uc804 \ube44\ub3d9\uae30 IO \ub77c\uc774\ube0c\ub7ec\ub9ac \uc704\uc5d0 \uad6c\ucd95\ub429\ub2c8\ub2e4. <a href=\"https:\/\/netty.io\/\">Netty<\/a>\u00a0\uc6b0\ub9ac\ub294 \uc218\ub144\uac04 \uad11\ubc94\uc704\ud55c Netty \uc0ac\uc6a9\uc790\ub85c\uc11c \ud328\uce58\ub97c \uc81c\uacf5\ud588\uc744 \ubfd0\ub9cc \uc544\ub2c8\ub77c <a href=\"https:\/\/github.com\/netty\/netty\/tree\/4.1\/codec-memcache\">\uba64\uce90\uc2dc \ucf54\ub371<\/a> \ud504\ub85c\uc81d\ud2b8\ub85c \ub3cc\uc544\uac11\ub2c8\ub2e4.<\/p>\n<p>\ubaa8\ub4e0 \ub124\ud2f0 <a href=\"https:\/\/netty.io\/4.0\/api\/io\/netty\/channel\/Channel.html\">\ucc44\ub110<\/a> \ub294 \uc18c\ucf13\uc5d0 \ud574\ub2f9\ud558\uba70 \uc774\ubca4\ud2b8 \ub8e8\ud504 \uc704\uc5d0 \ub2e4\uc911\ud654\ub429\ub2c8\ub2e4. \uc2a4\ub808\ub529 \ubaa8\ub378\uc5d0 \ub300\ud574\uc11c\ub294 \ucd94\ud6c4 \ube14\ub85c\uadf8 \uac8c\uc2dc\ubb3c\uc5d0\uc11c \ub2e4\ub8f0 \uc608\uc815\uc774\uc9c0\ub9cc, \uc9c0\uae08\uc740 \uae30\uc874 \ube14\ub85c\ud0b9 IO\uc758 \"\uc18c\ucf13\ub2f9 \ud558\ub098\uc758 \uc2a4\ub808\ub4dc\" \ubaa8\ub378 \ub300\uc2e0 Netty\uac00 \ubaa8\ub4e0 \uc5f4\ub9b0 \uc18c\ucf13\uc744 \uac00\uc838\uc640 \uc18c\uc218\uc758 \uc774\ubca4\ud2b8 \ub8e8\ud504\uc5d0 \ubd84\uc0b0\uc2dc\ud0a8\ub2e4\ub294 \uc810\uc744 \uc54c\uc544\ub450\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ub9e4\uc6b0 \ud6a8\uc728\uc801\uc778 \ubc29\uc2dd\uc73c\ub85c \uc774 \uc791\uc5c5\uc744 \uc218\ud589\ud558\ubbc0\ub85c Netty\uac00 \uc0ac\uc6a9\ub418\ub294 \uac83\uc740 \ub2f9\uc5f0\ud569\ub2c8\ub2e4. <a href=\"https:\/\/netty.io\/wiki\/adopters.html\">\uc5c5\uacc4 \uc804\ubc18\uc5d0\uc11c<\/a>\u00a0\uace0\uc131\ub2a5, \uc800\uc9c0\uc5f0 \ub124\ud2b8\uc6cc\ud0b9 \ucef4\ud3ec\ub10c\ud2b8\uc785\ub2c8\ub2e4.<\/p>\n<p>\ucc44\ub110\uc740 \ubc14\uc774\ud2b8\uac00 \ub4e4\uc5b4\uc624\uace0 \ub098\uac00\ub294 \uac83\uc5d0\ub9cc \uad00\uc2ec\uc774 \uc788\uae30 \ub54c\ubb38\uc5d0 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc218\uc900 \uc694\uccad(\uc608: N1QL \ucffc\ub9ac \ub610\ub294 \ud0a4\/\uac12 \uac00\uc838\uc624\uae30 \uc694\uccad)\uc744 \uc801\uc808\ud55c \uc774\uc9c4 \ud45c\ud604\uc73c\ub85c \uc778\ucf54\ub529\ud558\uace0 \ub514\ucf54\ub529\ud558\ub294 \ubc29\ubc95\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. Netty\uc5d0\uc11c\ub294 \uc774 \uc791\uc5c5\uc744 \uc218\ud589\ud558\uae30 \uc704\ud574 <a href=\"https:\/\/netty.io\/4.0\/api\/io\/netty\/channel\/ChannelHandler.html\">\ud578\ub4e4\ub7ec<\/a> \ub97c <a href=\"https:\/\/netty.io\/4.0\/api\/io\/netty\/channel\/ChannelPipeline.html\">\ucc44\ub110 \ud30c\uc774\ud504\ub77c\uc778<\/a>. \ubaa8\ub4e0 \ub124\ud2b8\uc6cc\ud06c \uc4f0\uae30 \uc791\uc5c5\uc740 \ud30c\uc774\ud504\ub77c\uc778\uc744 \ub530\ub77c \ub0b4\ub824\uac00\uace0 \uc11c\ubc84 \uc751\ub2f5\uc740 \ub2e4\uc2dc \ud30c\uc774\ud504\ub77c\uc778\uc744 \ub530\ub77c \uc62c\ub77c\uc624\uac8c \ub429\ub2c8\ub2e4(Netty \uc6a9\uc5b4\ub85c\ub294 \uc778\ubc14\uc6b4\ub4dc \ubc0f \uc544\uc6c3\ubc14\uc6b4\ub4dc\ub77c\uace0\ub3c4 \ud568).<\/p>\n<p>\uc77c\ubd80 \ud578\ub4e4\ub7ec\ub294 \uc0ac\uc6a9\ub418\ub294 \uc11c\ube44\uc2a4\uc640 \ubb34\uad00\ud558\uac8c \ucd94\uac00\ub418\uba70(\uc608: \ub85c\uae45 \ub610\ub294 \uc554\ud638\ud654), \ub2e4\ub978 \ud578\ub4e4\ub7ec\ub294 \uc11c\ube44\uc2a4 \uc720\ud615\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4(\uc608: N1QL \uc751\ub2f5\uc758 \uacbd\uc6b0 \uc751\ub2f5 \uad6c\uc870\uc5d0 \ub9de\uac8c \uc0ac\uc6a9\uc790 \uc815\uc758\ub41c JSON \uc2a4\ud2b8\ub9ac\ubc0d \ud30c\uc11c\uac00 \uc788\uc2b5\ub2c8\ub2e4).<\/p>\n<p>\uac1c\ubc1c \ub610\ub294 \ub514\ubc84\uae45 \uc911\uc5d0 \ud328\ud0b7 \uc218\uc900 \ub85c\uae45 \ucd9c\ub825\uc744 \uc5bb\ub294 \ubc29\ubc95\uc774 \uad81\uae08\ud558\uc2e0 \uacbd\uc6b0(\ud504\ub85c\ub355\uc158\uc5d0\uc11c\ub294 tcpdump, wireshark \ub4f1\uc744 \uc0ac\uc6a9), \uc790\uc8fc \uc0ac\uc6a9\ud558\ub294 \ub85c\uadf8 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c TRACE \ub85c\uadf8 \uc218\uc900\uc744 \ud65c\uc131\ud654\ud558\uae30\ub9cc \ud558\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \ucd9c\ub825\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<pre class=\"lang:default decode:true\">[cb-io-1-1] 2018-06-28 14:03:34 TRACE LoggingHandler:94 - [id: 0x41407638, L:\/127.0.0.1:60923 - R:localhost\/127.0.0.1:11210] WRITE: 243B\r\n+-------------------------------------------------+\r\n| 0 1 2 3 4 5 6 7 8 9 a b c d e f |\r\n+--------+-------------------------------------------------+----------------+\r\n|00000000| 80 1f 00 db 00 00 00 00 00 00 00 e5 00 00 00 00 |................|\r\n|00000010| 00 00 00 00 00 00 00 00 7b 22 61 22 3a 22 63 6f |........{\"a\":\"co|\r\n|00000020| 75 63 68 62 61 73 65 2d 6a 61 76 61 2d 63 6c 69 |uchbase-java-cli|\r\n|00000030| 65 6e 74 2f 32 2e 36 2e 30 2d 53 4e 41 50 53 48 |ent\/2.6.0-SNAPSH|\r\n|00000040| 4f 54 20 28 67 69 74 3a 20 32 2e 36 2e 30 2d 62 |OT (git: 2.6.0-b|\r\n|00000050| 65 74 61 2d 31 36 2d 67 35 63 65 30 38 62 30 2c |eta-16-g5ce08b0,|\r\n|00000060| 20 63 6f 72 65 3a 20 31 2e 36 2e 30 2d 62 65 74 | core: 1.6.0-bet|\r\n|00000070| 61 2d 33 33 2d 67 31 62 33 65 36 66 62 29 20 28 |a-33-g1b3e6fb) (|\r\n|00000080| 4d 61 63 20 4f 53 20 58 2f 31 30 2e 31 33 2e 34 |Mac OS X\/10.13.4|\r\n|00000090| 20 78 38 36 5f 36 34 3b 20 4a 61 76 61 20 48 6f | x86_64; Java Ho|\r\n|000000a0| 74 53 70 6f 74 28 54 4d 29 20 36 34 2d 42 69 74 |tSpot(TM) 64-Bit|\r\n|000000b0| 20 53 65 72 76 65 72 20 56 4d 20 31 2e 38 2e 30 | Server VM 1.8.0|\r\n|000000c0| 5f 31 30 31 2d 62 31 33 29 22 2c 22 69 22 3a 22 |_101-b13)\",\"i\":\"|\r\n|000000d0| 30 43 34 37 35 41 43 41 35 46 33 38 30 41 32 31 |0C475ACA5F380A21|\r\n|000000e0| 2f 30 30 30 30 30 30 30 30 34 31 34 30 37 36 33 |\/000000004140763|\r\n|000000f0| 38 22 7d |8\"} |\r\n+--------+-------------------------------------------------+----------------+<\/pre>\n<p>\uc791\uc740 <span class=\"lang:default decode:true crayon-inline\">\ub85c\uae45 \ud578\ub4e4\ub7ec<\/span>\u00a0 \ub97c \ucd94\uac00\ud560 \uc218 \uc788\uc744\uae4c\uc694? \ud30c\uc774\ud504\ub77c\uc778\uc5d0 \ucd94\uc801\uc774 \ud65c\uc131\ud654\ub41c \uacbd\uc6b0\uc5d0\ub9cc \ub85c\uae45 \ud578\ub4e4\ub7ec\ub97c \ucd94\uac00\ud558\uae30 \ub54c\ubb38\uc5d0 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 \uacbd\uc6b0(\ub300\ubd80\ubd84\uc758 \uacbd\uc6b0) \uc624\ubc84\ud5e4\ub4dc\ub97c \uc9c0\ubd88\ud558\uc9c0 \uc54a\uc544\ub3c4 \ub429\ub2c8\ub2e4:<\/p>\n<pre class=\"lang:java decode:true\">bootstrap = new BootstrapAdapter(new Bootstrap()\r\n  \/\/ *snip*\r\n  .option(ChannelOption.ALLOCATOR, allocator)\r\n  .option(ChannelOption.TCP_NODELAY, tcpNodelay)\r\n  .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, env.socketConnectTimeout())\r\n  .handler(new ChannelInitializer&lt;Channel&gt;() {\r\n    @Override\r\n    protected void initChannel(Channel channel) throws Exception {\r\n      ChannelPipeline pipeline = channel.pipeline();\r\n      if (env.sslEnabled()) {\r\n        pipeline.addLast(new SslHandler(sslEngineFactory.get()));\r\n      }\r\n      if (LOGGER.isTraceEnabled()) {\r\n        pipeline.addLast(LOGGING_HANDLER_INSTANCE);\r\n      }\r\n    customEndpointHandlers(pipeline);\r\n  }\r\n}));<\/pre>\n<p>\ub610\ud55c \ud658\uacbd \uad6c\uc131\uc5d0 \ub530\ub77c \ud30c\uc774\ud504\ub77c\uc778\uc5d0 SSL\/TLS \ud578\ub4e4\ub7ec\ub97c \ucd94\uac00\ud558\uac70\ub098 TCP \ub178\ub4dc \ub808\uc774 \ubc0f \uc18c\ucf13 \ud0c0\uc784\uc544\uc6c3\uc744 \uad6c\uc131\ud558\ub294 \ub4f1 \ub2e4\ub978 \uc870\uc815 \uc791\uc5c5\uc744 \uc218\ud589\ud558\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\uc0ac\uc6a9\uc790 \uc9c0\uc815 \uc5d4\ub4dc\ud3ec\uc778\ud2b8 \ud578\ub4e4\ub7ec<\/span>\u00a0 \uba54\uc11c\ub4dc\uac00 \uac01 \uc11c\ube44\uc2a4\uc5d0 \ub300\ud574 \uc7ac\uc815\uc758\ub418\uba70, \ub2e4\uc74c\uc740 KV \uacc4\uce35\uc5d0 \ub300\ud55c \ud30c\uc774\ud504\ub77c\uc778\uc785\ub2c8\ub2e4(\uc57d\uac04 \ub2e8\uc21c\ud654):<\/p>\n<pre class=\"lang:java decode:true\">if (environment().keepAliveInterval() &gt; 0) {\r\n    pipeline.addLast(new IdleStateHandler(environment().keepAliveInterval(), 0, 0, TimeUnit.MILLISECONDS));\r\n}\r\n\r\npipeline\r\n    .addLast(new BinaryMemcacheClientCodec())\r\n    .addLast(new BinaryMemcacheObjectAggregator(Integer.MAX_VALUE));\r\n\r\npipeline\r\n    .addLast(new KeyValueFeatureHandler(context()))\r\n    .addLast(new KeyValueErrorMapHandler());\r\n\r\nif (!environment().certAuthEnabled()) {\r\n    pipeline.addLast(new KeyValueAuthHandler(username(), password(), environment().forceSaslPlain()));\r\n}\r\n\r\npipeline\r\n    .addLast(new KeyValueSelectBucketHandler(bucket()))\r\n    .addLast(new KeyValueHandler(this, responseBuffer(), false, true));<\/pre>\n<p>\ub9ce\uc740 \uc77c\uc774 \uc77c\uc5b4\ub098\uace0 \uc788\uc2b5\ub2c8\ub2e4! \ud558\ub098\uc529 \uc0b4\ud3b4\ubd05\uc2dc\ub2e4:<\/p>\n<ul>\n<li>\uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\uc720\ud734 \uc0c1\ud0dc \ud578\ub4e4\ub7ec<\/span>\u00a0 \ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc218\uc900 \ud0b5\ub77c\uc774\ube0c\ub97c \ud2b8\ub9ac\uac70\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li>\ub2e4\uc74c \ub450 \ud578\ub4e4\ub7ec <span class=\"lang:default decode:true crayon-inline\">\ubc14\uc774\ub108\ub9ac\uba64\uce90\uc2dc\ud074\ub77c\uc774\uc5b8\ud2b8\ucf54\ub371<\/span>\u00a0 \uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\ubc14\uc774\ub108\ub9ac\uba64\uce90\uc2dc \uc624\ube0c\uc81d\ud2b8 \uc5b4\uadf8\ub9ac\uac8c\uc774\ud130<\/span>\u00a0 \ub294 \uba64\uce90\uc2dc \uc694\uccad \ubc0f \uc751\ub2f5 \uac1d\uccb4\ub97c \ubc14\uc774\ud2b8 \ub2e8\uc704 \ud45c\ud604\uc73c\ub85c \uc778\ucf54\ub529\ud558\uace0 \ub2e4\uc2dc \uc778\ucf54\ub529\ud558\ub294 \uc791\uc5c5\uc744 \ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/li>\n<li><span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uae30\ub2a5 \ud578\ub4e4\ub7ec<\/span>\u00a0, <span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uc624\ub958 \ub9f5 \ud578\ub4e4\ub7ec<\/span>\u00a0, <span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uc778\uc99d \ud578\ub4e4\ub7ec<\/span>\u00a0 \uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uc120\ud0dd \ubc84\ud0b7 \ud578\ub4e4\ub7ec<\/span>\u00a0 \ub294 \ubaa8\ub450 \uc5f0\uacb0 \ub2e8\uacc4\uc5d0\uc11c \ud578\ub4dc\uc170\uc774\ud0b9, \uc778\uc99d, \ubc84\ud0b7 \uc120\ud0dd \ub4f1\uc744 \uc218\ud589\ud558\uace0 \uc644\ub8cc\ub418\uba74 \ud30c\uc774\ud504\ub77c\uc778\uc5d0\uc11c \uc2a4\uc2a4\ub85c\ub97c \uc81c\uac70\ud569\ub2c8\ub2e4.<\/li>\n<li>\ub9c8\uc9c0\ub9c9\uc73c\ub85c <span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \ud578\ub4e4\ub7ec<\/span>\u00a0 \ub294 \ub300\ubd80\ubd84\uc758 \uc791\uc5c5\uc744 \uc218\ud589\ud558\uba70 \uc2dc\uc2a4\ud15c\uc5d0 \ub4e4\uc5b4\uc624\uace0 \ub098\uac00\ub294 \ubaa8\ub4e0 \ub2e4\uc591\ud55c \uc694\uccad \uc720\ud615\uc744 \"\uc54c\uace0\" \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\ub2e4\ub978 \uac83\uc744 \uc0b4\ud3b4\ubcf4\uace0 \uc2f6\ub2e4\uba74, <a href=\"https:\/\/github.com\/couchbase\/couchbase-jvm-core\/blob\/master\/src\/main\/java\/com\/couchbase\/client\/core\/endpoint\/query\/QueryEndpoint.java#L48\">\uc5ec\uae30<\/a>\u00a0\uc740 N1QL \ud30c\uc774\ud504\ub77c\uc778\uc744 \uc608\ub85c \ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ud55c \ub808\uc774\uc5b4 \uc704\ub85c \uc774\ub3d9\ud558\uae30 \uc804\uc5d0 \uc911\uc694\ud55c \ubd80\ubd84\uc774 \ud558\ub098 \uc788\uc2b5\ub2c8\ub2e4. RxJava \uc635\uc800\ubc84\ube14 <a href=\"https:\/\/github.com\/couchbase\/couchbase-jvm-core\/blob\/master\/src\/main\/java\/com\/couchbase\/client\/core\/endpoint\/AbstractGenericHandler.java#L507\">\uc644\ub8cc<\/a> \ub3c4 \uc774 \uacc4\uce35\uc5d0\uc11c \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uc751\ub2f5\uc774 \ub514\ucf54\ub529\ub418\uba74 \uc774\ubca4\ud2b8 \ub8e8\ud504\uc5d0\uc11c \uc9c1\uc811 \ub610\ub294 \uc2a4\ub808\ub4dc \ud480(\uae30\ubcf8\uc801\uc73c\ub85c \uad6c\uc131\ub428)\uc5d0\uc11c \uc644\ub8cc\ub429\ub2c8\ub2e4.<\/p>\n<p>\ucc44\ub110\uc774 \ub2e4\uc6b4\ub418\uba74(\uae30\ubcf8 \uc18c\ucf13\uc774 \ub2eb\ud788\uae30 \ub54c\ubb38\uc5d0) \uc774 \ub808\ubca8\uc758 \ubaa8\ub4e0 \uc0c1\ud0dc\uac00 \uc0ac\ub77c\uc9c4\ub2e4\ub294 \uac83\uc744 \uc544\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ub2e4\uc2dc \uc5f0\uacb0\uc744 \uc2dc\ub3c4\ud558\uba74 \uc0c8\ub85c\uc6b4 \ucc44\ub110\uc774 \uc0dd\uc131\ub429\ub2c8\ub2e4. \uadf8\ub807\ub2e4\uba74 \ucc44\ub110\uc740 \ub204\uac00 \uad00\ub9ac\ud560\uae4c\uc694? \ud55c \uacc4\uce35 \uc704\ub85c \uc62c\ub77c\uac00 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\uc5d4\ub4dc\ud3ec\uc778\ud2b8 \uacc4\uce35<\/h2>\n<p>\uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\uc5d4\ub4dc\ud3ec\uc778\ud2b8<\/span>\u00a0 \uacc4\uce35\uc740 \ubd80\ud2b8\uc2a4\ud2b8\ub7a9, \uc7ac\uc5f0\uacb0, \uc5f0\uacb0 \ud574\uc81c \ub4f1 \ucc44\ub110\uc758 \uc218\uba85 \uc8fc\uae30\ub97c \uad00\ub9ac\ud569\ub2c8\ub2e4. \ucf54\ub4dc\ub97c \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. <a href=\"https:\/\/github.com\/couchbase\/couchbase-jvm-core\/blob\/master\/src\/main\/java\/com\/couchbase\/client\/core\/endpoint\/AbstractEndpoint.java\">\uc5ec\uae30<\/a>.<\/p>\n<p>\uc5d4\ub4dc\ud3ec\uc778\ud2b8\uc640 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\uac00 \uad00\ub9ac\ud558\ub294 \ucc44\ub110 \uc0ac\uc774\uc5d0\ub294 \ud56d\uc0c1 1:1 \uad00\uacc4\uac00 \uc788\uc9c0\ub9cc, \ucc44\ub110\uc774 \ub04a\uc5b4\uc838 \uc18c\ucf13\uc744 \ub2e4\uc2dc \uc5f0\uacb0\ud574\uc57c \ud558\ub294 \uacbd\uc6b0 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub294 \uadf8\ub300\ub85c \uc720\uc9c0\ub418\uace0 \ub0b4\ubd80\uc801\uc73c\ub85c \uc0c8\ub85c\uc6b4 \uc18c\ucf13\uc744 \uc5bb\uc2b5\ub2c8\ub2e4. \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub294 \uc694\uccad\uc774 \uc774\ubca4\ud2b8 \ub8e8\ud504\ub85c \uc804\ub2ec\ub418\ub294 \uacf3\uc774\uae30\ub3c4 \ud569\ub2c8\ub2e4(\ub2e8\uc21c\ud654):<\/p>\n<pre class=\"lang:java decode:true\">@Override\r\npublic void send(final CouchbaseRequest request) {\r\n\tif (channel.isActive() &amp;&amp; channel.isWritable()) {\r\n\t    channel.write(request, channel.voidPromise());\r\n\t} else {\r\n\t    responseBuffer.publishEvent(ResponseHandler.RESPONSE_TRANSLATOR, request, request.observable());\r\n\t}\r\n}<\/pre>\n<p>\ucc44\ub110\uc774 \ud65c\uc131\ud654\ub418\uc5b4 \uc4f0\uae30 \uac00\ub2a5\ud558\uba74 \uc694\uccad\uc744 \ud30c\uc774\ud504\ub77c\uc778\uc5d0 \uc4f0\uace0, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ub2e4\uc2dc \uc804\uc1a1\ub418\uc5b4 \ub2e4\ub978 \uc2dc\ub3c4\ub97c \uc704\ud574 \ub300\uae30\uc5f4\uc5d0 \ub2e4\uc2dc \ub300\uae30\ud569\ub2c8\ub2e4.<\/p>\n<p>\ucc44\ub110\uc774 \ub2eb\ud78c \uacbd\uc6b0 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub294 \uba85\uc2dc\uc801\uc73c\ub85c \uc911\uc9c0\ud558\ub77c\ub294 \uc9c0\uc2dc\uac00 \uc5c6\ub294 \ud55c (\uad6c\uc131\ub41c \ubc31\uc624\ud504\ub97c \uc0ac\uc6a9\ud558\uc5ec) \ub2e4\uc2dc \uc5f0\uacb0\uc744 \uc2dc\ub3c4\ud55c\ub2e4\ub294 \uc810\uc744 \uba85\uc2ec\ud558\uc138\uc694. \ucc44\ub110\uc758 \uad00\ub9ac\uc790\uac00 <span class=\"lang:default decode:true crayon-inline\">\uc5d4\ub4dc\ud3ec\uc778\ud2b8<\/span>\u00a0 \ud1b5\ud654 <span class=\"lang:default decode:true crayon-inline\">\uc5f0\uacb0 \ub04a\uae30<\/span>\u00a0 \ub97c \uc124\uc815\ud558\uc5ec \ud574\ub2f9 \uc11c\ube44\uc2a4\/\ub178\ub4dc\uac00 \ub354 \uc774\uc0c1 \uad6c\uc131\uc758 \uc77c\ubd80\uac00 \uc544\ub2d0 \ub54c \uad81\uadf9\uc801\uc73c\ub85c \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \ub9ac\ubc38\ub7f0\uc2f1\uc774 \ub05d\ub0a0 \ub54c \ub610\ub294 \uc7a5\uc560 \uc870\uce58 \uc911\uc5d0 \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc774 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\uac00 \uc885\ub8cc\ub420 \uc218 \uc788\ub2e4\uace0 \ucd94\ub860\ud558\ub294 \uc0c8 \ud074\ub7ec\uc2a4\ud130 \uad6c\uc131\uc744 \uc218\uc2e0\ud55c \ub2e4\uc74c \uadf8\uc5d0 \ub530\ub77c \uc885\ub8cc\ud569\ub2c8\ub2e4. \uc5b4\ub5a4 \uc774\uc720\ub85c\ub4e0 \uc18c\ucf13 \uc5f0\uacb0 \ud574\uc81c\uc640 \uc774 \uc815\ubcf4 \uc804\ud30c \uc0ac\uc774\uc5d0 \uc9c0\uc5f0\uc774 \ubc1c\uc0dd\ud558\uba74 \uacb0\uad6d \uc7ac\uc5f0\uacb0 \uc2dc\ub3c4\uac00 \uc911\ub2e8\ub418\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ud558\ub098\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub3c4 \uc88b\uc9c0\ub9cc \ub9ce\uc73c\uba74 \ub9ce\uc744\uc218\ub85d \uc88b\uaca0\uc8e0? \uc774\uc81c \ud55c \ub2e8\uacc4 \ub354 \uc62c\ub77c\uac00\uc11c \uc5d4\ub4dc\ud3ec\uc778\ud2b8\uac00 \uc5b4\ub5bb\uac8c \ud480\ub9c1\ub418\uc5b4 \ub178\ub4dc \ubc0f \uc11c\ube44\uc2a4\ubcc4\ub85c \uc815\uad50\ud55c \uc5f0\uacb0 \ud480\uc744 \ub9cc\ub4dc\ub294\uc9c0 \uc54c\uc544\ubd05\uc2dc\ub2e4.<\/p>\n<h2>\uc11c\ube44\uc2a4 \uacc4\uce35<\/h2>\n<p>\uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\uc11c\ube44\uc2a4<\/span>\u00a0 \ub808\uc774\uc5b4\ub294 \ub178\ub4dc\ub2f9 \ud558\ub098 \uc774\uc0c1\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub97c \uad00\ub9ac\ud569\ub2c8\ub2e4. \uac01 \uc11c\ube44\uc2a4\ub294 \ud558\ub098\uc758 \ub178\ub4dc\ub9cc \ub2f4\ub2f9\ud558\ubbc0\ub85c \uc608\ub97c \ub4e4\uc5b4 5\uac1c\uc758 \ub178\ub4dc\ub85c \uad6c\uc131\ub41c Couchbase \ud074\ub7ec\uc2a4\ud130\uac00 \uc788\uace0 \uac01 \ub178\ub4dc\uc5d0\uc11c KV \uc11c\ube44\uc2a4\ub9cc \ud65c\uc131\ud654\ub41c \uacbd\uc6b0 \ud799 \ub364\ud504\ub97c \uac80\uc0ac\ud558\uba74 5\uac1c\uc758 <span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uc11c\ube44\uc2a4<\/span>\u00a0.<\/p>\n<p>\uc774\uc804 \ud074\ub77c\uc774\uc5b8\ud2b8 \ubc84\uc804\uc5d0\uc11c\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ubc29\ubc95\uc744 \ud1b5\ud574\uc11c\ub9cc \uc11c\ube44\uc2a4\ub2f9 \uace0\uc815\ub41c \uc218\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub97c \uad6c\uc131\ud560 \uc218 \uc788\uc5c8\uc2b5\ub2c8\ub2e4. <span class=\"lang:default decode:true crayon-inline\">kvEndpoints<\/span>\u00a0, <span class=\"lang:default decode:true crayon-inline\">\ucffc\ub9ac \uc5d4\ub4dc\ud3ec\uc778\ud2b8<\/span>\u00a0 \ub4f1. \ub354 \ubcf5\uc7a1\ud55c \uc694\uad6c \uc0ac\ud56d\uc73c\ub85c \uc778\ud574 \uac15\ub825\ud55c \uc5f0\uacb0 \ud480 \uad6c\ud604\uc73c\ub85c \uc774 \"\uace0\uc815\" \uc811\uadfc \ubc29\uc2dd\uc744 \ub354 \uc774\uc0c1 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uac8c \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uadf8\ub807\uae30 \ub54c\ubb38\uc5d0 \ub300\uc2e0 <span class=\"lang:default decode:true crayon-inline\">\ucffc\ub9ac \uc5d4\ub4dc\ud3ec\uc778\ud2b8<\/span>\u00a0 \uc774\uc81c \ub2e4\uc74c\uc744 \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4. <span class=\"lang:default decode:true crayon-inline\">\ucffc\ub9ac \uc11c\ube44\uc2a4 \uad6c\uc131<\/span>\u00a0 \ubc0f \uc774\uc5d0 \uc0c1\uc751\ud558\ub294 \ud56d\ubaa9.<\/p>\n<p>\ub2e4\uc74c\uc740 2.5.9 \ubc0f 2.6.0\uc758 \uc11c\ube44\uc2a4\ubcc4 \ud604\uc7ac \uae30\ubcf8 \ud480\uc785\ub2c8\ub2e4:<\/p>\n<ul>\n<li><span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uc11c\ube44\uc2a4<\/span>\u00a0: \ub178\ub4dc\ub2f9 \uc5d4\ub4dc\ud3ec\uc778\ud2b8 1\uac1c, \uace0\uc815.<\/li>\n<li><span class=\"lang:default decode:true crayon-inline\">\ucffc\ub9ac \uc11c\ube44\uc2a4<\/span>\u00a0\ub178\ub4dc\ub2f9 0~12\uac1c\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8, \ub3d9\uc801.<\/li>\n<li><span class=\"lang:default decode:true crayon-inline\">ViewService<\/span>\u00a0\ub178\ub4dc\ub2f9 0~12\uac1c\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8, \ub3d9\uc801.<\/li>\n<li><span class=\"lang:default decode:true crayon-inline\">\ubd84\uc11d \uc11c\ube44\uc2a4<\/span>\u00a0\ub178\ub4dc\ub2f9 0~12\uac1c\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8, \ub3d9\uc801.<\/li>\n<li><span class=\"lang:default decode:true crayon-inline\">\uac80\uc0c9 \uc11c\ube44\uc2a4<\/span>\u00a0\ub178\ub4dc\ub2f9 0~12\uac1c\uc758 \uc5d4\ub4dc\ud3ec\uc778\ud2b8, \ub3d9\uc801.<\/li>\n<\/ul>\n<p>KV\uac00 \uae30\ubcf8\uc801\uc73c\ub85c \ud480\ub9c1\ub418\uc9c0 \uc54a\ub294 \uc774\uc720\ub294 \uc5f0\uacb0 \ud578\ub4dc\uc250\uc774\ud0b9 \ube44\uc6a9\uc774 \ud6e8\uc52c \ub354 \ub9ce\uc774 \ub4e4\uace0(\ud30c\uc774\ud504\ub77c\uc778\uc758 \ubaa8\ub4e0 \ud578\ub4e4\ub7ec\ub97c \uae30\uc5b5\ud558\uc138\uc694) \ud2b8\ub798\ud53d \ud328\ud134\uc774 \uc77c\ubc18\uc801\uc73c\ub85c \ubb34\uac70\uc6b4 \ucffc\ub9ac \uae30\ubc18 \uc11c\ube44\uc2a4\uc640\ub294 \ub9e4\uc6b0 \ub2e4\ub974\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \ud604\uc7a5\uc758 \uacbd\ud5d8\uc5d0 \ub530\ub974\uba74 KV \uc5d4\ub4dc\ud3ec\uc778\ud2b8 \uc218\ub97c \ub298\ub9ac\ub294 \uac83\uc740 '\ub300\ub7c9 \ubd80\ud558' \uc2dc\ub098\ub9ac\uc624\uc640 \ud55c \uc18c\ucf13\uc758 '\ud30c\uc774\ud504'\uac00 \ub108\ubb34 \uc791\uc740 \ub9e4\uc6b0 \uae09\uaca9\ud55c \ud2b8\ub798\ud53d\uc5d0\uc11c\ub9cc \uc758\ubbf8\uac00 \uc788\ub294 \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4. \uc774\ub97c \uc81c\ub300\ub85c \ubca4\uce58\ub9c8\ud0b9\ud558\uc9c0 \uc54a\uc73c\uba74 KV \uacc4\uce35\uc5d0 \uc18c\ucf13\uc744 \ub354 \ucd94\uac00\ud558\uba74 \uc131\ub2a5\uc774 \ud5a5\uc0c1\ub418\ub294 \ub300\uc2e0 \uc131\ub2a5\uc774 \uc800\ud558\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc989, \ub9ce\ub2e4\uace0 \ud574\uc11c \ud56d\uc0c1 \uc88b\uc740 \uac83\uc740 \uc544\ub2c8\ub77c\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p>\ud480\ub9c1 \ub85c\uc9c1\uc740 \ub2e4\uc74c\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. <a href=\"https:\/\/github.com\/couchbase\/couchbase-jvm-core\/blob\/master\/src\/main\/java\/com\/couchbase\/client\/core\/service\/PooledService.java\">\uc5ec\uae30<\/a> \uad81\uae08\ud558\ub2e4\uba74 \uadf8 \uc548\uc5d0 \uc788\ub294 \ud2b9\uc815 \uc758\ubbf8\ub97c \uc0b4\ud3b4\ubcfc \uac00\uce58\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc11c\ube44\uc2a4\uc758 \uc5f0\uacb0 \ub2e8\uacc4\uc5d0\uc11c \ucd5c\uc18c \uc5d4\ub4dc\ud3ec\uc778\ud2b8 \uc218\uac00 \ubbf8\ub9ac \uc124\uc815\ub418\uc5b4 \uc788\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4. \ucd5c\uc18c\uac12\uc774 \ucd5c\ub300\uac12\uacfc \uac19\uc73c\uba74 \ub3d9\uc801 \ud480\ub9c1\uc774 \ud6a8\uacfc\uc801\uc73c\ub85c \ube44\ud65c\uc131\ud654\ub418\uace0 \ucf54\ub4dc\uac00 \uac01 \uc694\uccad\uc5d0 \ub300\ud574 \uc5d4\ub4dc\ud3ec\uc778\ud2b8 \uc911 \ud558\ub098\ub97c \uc120\ud0dd\ud569\ub2c8\ub2e4:<\/p>\n<pre class=\"lang:java decode:true\">synchronized (epMutex) {\r\n    int numToConnect = minEndpoints - endpoints.size();\r\n    if (numToConnect == 0) {\r\n        LOGGER.debug(\"No endpoints needed to connect, skipping.\");\r\n        return Observable.just(state());\r\n    }\r\n    for (int i = 0; i &lt; numToConnect; i++) {\r\n        Endpoint endpoint = endpointFactory.create(hostname, bucket, username, password, port, ctx);\r\n        endpoints.add(endpoint);\r\n        endpointStates.register(endpoint, endpoint);\r\n    }\r\n\r\n    LOGGER.debug(logIdent(hostname, PooledService.this)\r\n            + \"New number of endpoints is {}\", endpoints.size());\r\n}<\/pre>\n<p>\uc774\ub294 \ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \uc911\uc5d0 \ubc14\ub85c \ub85c\uadf8\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<pre class=\"lang:default decode:true\">[cb-computations-5] 2018-06-28 14:03:34 DEBUG Service:257 - [localhost][KeyValueService]: New number of endpoints is 1\r\n[cb-computations-8] 2018-06-28 14:03:35 DEBUG Service:248 - [localhost][QueryService]: No endpoints needed to connect, skipping.<\/pre>\n<p>\uc694\uccad\uc774 \ub4e4\uc5b4\uc624\uba74 \uc694\uccad\uc774 \ub514\uc2a4\ud328\uce58\ub418\uac70\ub098 \ub2e4\ub978 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub97c \ub9cc\ub4e4\uc5b4\uc57c \ud558\ub294 \uacbd\uc6b0(\ud480\uc5d0 \uc5ec\uc804\ud788 \uc5ec\uc720\uac00 \uc788\uc74c) \uc774\ub97c \ucc98\ub9ac\ud558\uae30\ub3c4 \ud569\ub2c8\ub2e4(\uc57d\uac04 \ub2e8\uc21c\ud654):<\/p>\n<pre class=\"lang:java decode:true\">@Override\r\npublic void send(final CouchbaseRequest request) {\r\n    Endpoint endpoint = endpoints.size() &gt; 0 ? selectionStrategy.select(request, endpoints) : null;\r\n\r\n    if (endpoint == null) {\r\n        if (fixedEndpoints || (endpoints.size() &gt;= maxEndpoints)) {\r\n            RetryHelper.retryOrCancel(env, request, responseBuffer);\r\n        } else {\r\n            maybeOpenAndSend(request);\r\n        }\r\n    } else {\r\n        endpoint.send(request);\r\n    }\r\n}<\/pre>\n<p>\uc801\uc808\ud55c \uc5d4\ub4dc\ud3ec\uc778\ud2b8\ub97c \ucc3e\uc744 \uc218 \uc5c6\uace0 \ud480\uc774 \uace0\uc815\ub418\uc5b4 \uc788\uac70\ub098 \ud55c\ub3c4\uc5d0 \ub3c4\ub2ec\ud55c \uacbd\uc6b0 \uc791\uc5c5\uc774 \ub2e4\uc2dc \uc2dc\ub3c4\ub418\ub3c4\ub85d \uc608\uc57d\ub418\uba70, \uc774\ub294 \uc5d4\ub4dc\ud3ec\uc778\ud2b8\uac00 \ud65c\uc131\ud654\ub418\uc5b4 \uc788\uc9c0 \uc54a\uac70\ub098 \uc4f0\uae30 \ubd88\uac00\ub2a5\ud55c \uacbd\uc6b0\uc758 \ub85c\uc9c1\uacfc \ub9e4\uc6b0 \uc720\uc0ac\ud569\ub2c8\ub2e4.<\/p>\n<p>\ud480\ub9c1\ub41c HTTP \uae30\ubc18 \uc11c\ube44\uc2a4\uc5d0\uc11c\ub294 \uc774\ub7ec\ud55c \uc18c\ucf13\uc744 \uc601\uc6d0\ud788 \uc720\uc9c0\ud558\uace0 \uc2f6\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uc720\ud734 \uc2dc\uac04(\uae30\ubcf8\uac12\uc740 300\ucd08)\uc744 \uad6c\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uac01 \ud480\uc740 \uc720\ud734 \ud0c0\uc774\uba38\ub97c \uc2e4\ud589\ud558\uc5ec \uc5d4\ub4dc\ud3ec\uc778\ud2b8\uac00 \uc124\uc815\ub41c \uac04\uaca9\ubcf4\ub2e4 \uc624\ub798 \uc720\ud734 \uc0c1\ud0dc\uc778\uc9c0 \uc815\uae30\uc801\uc73c\ub85c \uac80\uc0ac\ud558\uace0 \uc720\ud734 \uc0c1\ud0dc\uc778 \uacbd\uc6b0 \uc5f0\uacb0\uc744 \ub04a\uc2b5\ub2c8\ub2e4. \uc774 \ub85c\uc9c1\uc740 \ud56d\uc0c1 \ucd5c\uc18c\uac12 \uc774\ud558\ub85c \ub5a8\uc5b4\uc9c0\uc9c0 \uc54a\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\n<h2>\uc77c\ubc18\uc801\uc778 \uc5f0\uacb0 \uad00\ub828 \uc624\ub958<\/h2>\n<p>\uc774\uc81c SDK\uac00 \uc18c\ucf13\uc744 \ucc98\ub9ac\ud558\uace0 \ud480\ub9c1\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc798 \uc774\ud574\ud588\uc73c\ub2c8 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uba87 \uac00\uc9c0 \uc624\ub958 \uc2dc\ub098\ub9ac\uc624\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>\ucde8\uc18c \uc694\uccad\ud558\uae30<\/h3>\n<p>\uc5d0 \ub300\ud574 \uc774\uc57c\uae30\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. <span class=\"lang:default decode:true crayon-inline\">\uc694\uccad \ucde8\uc18c \uc608\uc678<\/span>\u00a0 \uba3c\uc800.<\/p>\n<p>\uc791\uc5c5\uc744 \uc218\ud589 \uc911\uc778\ub370 \uc2e4\ud328\ud558\ub294 \uacbd\uc6b0 <span class=\"lang:default decode:true crayon-inline\">\uc694\uccad \ucde8\uc18c \uc608\uc678<\/span>\u00a0 \uc77c\ubc18\uc801\uc73c\ub85c \ub450 \uac00\uc9c0 \uc6d0\uc778\uc774 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\uc791\uc5c5\uc774 \ub124\ud2b8\uc6cc\ud06c\ub97c \ud1b5\ud574 \uc804\uc1a1\ub418\uc9c0 \uc54a\uace0 \ud074\ub77c\uc774\uc5b8\ud2b8 \ub0b4\ubd80\ub97c \ub3cc\uba70 \uad6c\uc131\ub41c \uc2dc\uac04\ubcf4\ub2e4 \ub354 \uc624\ub798 <span class=\"lang:default decode:true crayon-inline\">\ucd5c\ub300 \uc694\uccad \uc218\uba85<\/span>\u00a0.<\/li>\n<li>\ub124\ud2b8\uc6cc\ud06c\uc5d0 \uc694\uccad\uc774 \uc791\uc131\ub418\uc5c8\uc9c0\ub9cc \uc751\ub2f5\uc744 \ubc1b\uae30 \uc804\uc5d0 \uae30\ubcf8 \ucc44\ub110\uc774 \ub2eb\ud614\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\uc694\uccad \uc778\ucf54\ub529 \uc911 \ubb38\uc81c\uc640 \uac19\uc774 \ub35c \uc77c\ubc18\uc801\uc778 \ub2e4\ub978 \uc774\uc720\ub3c4 \uc788\uc9c0\ub9cc, \uc774 \ube14\ub85c\uadf8\uc5d0\uc11c\ub294 \ub450 \ubc88\uc9f8 \uc6d0\uc778\uc5d0 \ucd08\uc810\uc744 \ub9de\ucd9c \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p>\uadf8\ub807\ub2e4\uba74 \uc65c \uc694\uccad\uc744 \ucde8\uc18c\ud558\uace0 \uc544\uc9c1 \ud65c\uc131 \uc0c1\ud0dc\uc778 \ub2e4\ub978 \uc18c\ucf13\uc5d0\uc11c \ub2e4\uc2dc \uc2dc\ub3c4\ud558\uc9c0 \uc54a\uc544\uc57c \ud560\uae4c\uc694? \uadf8 \uc774\uc720\ub294 \ud574\ub2f9 \uc791\uc5c5\uc774 \uc774\ubbf8 \uc11c\ubc84\uc5d0 \ubd80\uc791\uc6a9\uc744 \uc77c\uc73c\ucf30\ub294\uc9c0(\uc608: \ubcc0\uc774\uac00 \uc801\uc6a9\ub41c \uacbd\uc6b0) \uc54c \uc218 \uc5c6\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \ube44\ud65c\uc131\ud654\ub418\uc9c0 \uc54a\uc740 \uc791\uc5c5\uc744 \ub2e4\uc2dc \uc2dc\ub3c4\ud558\uba74 \uc2e4\uc81c\ub85c \uc9c4\ub2e8\ud558\uae30 \uc5b4\ub824\uc6b4 \uc774\uc0c1\ud55c \uacb0\uacfc\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub300\uc2e0 \ud638\ucd9c\uc790\uc5d0\uac8c \uc694\uccad\uc774 \uc2e4\ud328\ud588\uc74c\uc744 \uc54c\ub9ac\uace0 \ub2e4\uc74c\uc5d0 \uc218\ud589\ud560 \uc791\uc5c5\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ub85c\uc9c1\uc5d0 \ub2ec\ub824 \uc788\uc2b5\ub2c8\ub2e4. \ub2e8\uc21c\ud55c \uac00\uc838\uc624\uae30 \uc694\uccad\uc774\uc5c8\uace0 \uc544\uc9c1 \uc2dc\uac04 \ucd08\uacfc \uc608\uc0b0 \ub0b4\uc5d0 \uc788\ub2e4\uba74 \uc9c1\uc811 \ub2e4\uc2dc \uc2dc\ub3c4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubcc0\uc870\uc778 \uacbd\uc6b0 \ubb38\uc11c\ub97c \uc77d\uace0 \uc801\uc6a9 \uc5ec\ubd80\ub97c \ud30c\uc545\ud558\uae30 \uc704\ud55c \ub85c\uc9c1\uc744 \ucd94\uac00\ud558\uac70\ub098 \uc989\uc2dc \ub2e4\uc2dc \ubcf4\ub0bc \uc218 \uc788\ub294\uc9c0 \ud655\uc778\ud574\uc57c \ud569\ub2c8\ub2e4. \uadf8\ub7f0 \ub2e4\uc74c API \ud638\ucd9c\uc790\uc5d0\uac8c \uc624\ub958\ub97c \ub2e4\uc2dc \uc804\ud30c\ud558\ub294 \uc635\uc158\uc774 \ud56d\uc0c1 \uc788\uc2b5\ub2c8\ub2e4. \uc5b4\ub5a4 \uacbd\uc6b0\ub4e0 SDK \uce21\uc5d0\uc11c \uc608\uce21\ud560 \uc218 \uc788\uc73c\uba70 \ubc31\uadf8\ub77c\uc6b4\ub4dc\uc5d0\uc11c \ub354 \uc774\uc0c1 \ubb38\uc81c\ub97c \uc77c\uc73c\ud0a4\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>\ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \ubb38\uc81c<\/h3>\n<p>\uc54c\uc544\ub450\uc5b4\uc57c \ud560 \ub610 \ub2e4\ub978 \uc624\ub958 \uc6d0\uc778\uc740 \uc18c\ucf13 \uc5f0\uacb0 \ub2e8\uacc4\uc758 \ubb38\uc81c\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ub85c\uadf8\uc5d0\uc11c \ubb34\uc2a8 \uc77c\uc774 \uc77c\uc5b4\ub098\uace0 \uc788\ub294\uc9c0 \uc54c\ub824\uc8fc\ub294 \uc124\uba85\uc801\uc778 \uc624\ub958(\uc608: \uc798\ubabb\ub41c \uc790\uaca9 \uc99d\uba85)\ub97c \ucc3e\uc744 \uc218 \uc788\uc9c0\ub9cc, \ud574\ub3c5\ud558\uae30 \uc870\uae08 \ub354 \uc5b4\ub824\uc6b4 \ub450 \uac00\uc9c0 \uc624\ub958\uac00 \uc788\uc2b5\ub2c8\ub2e4: \uc5f0\uacb0 \ubcf4\ud638 \uc2dc\uac04 \ucd08\uacfc\uc640 \uc7ac\uc870\uc815 \uc911 \ubc84\ud0b7 \uc120\ud0dd \uc624\ub958\uc785\ub2c8\ub2e4.<\/p>\n<p>\uc55e\uc11c \uc0b4\ud3b4\ubcf8 \uac83\ucc98\ub7fc KV \ud30c\uc774\ud504\ub77c\uc778\uc5d0\ub294 \ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \uc911\uc5d0 \uc11c\ubc84\uc640 \uc8fc\uace0\ubc1b\uc73c\uba70 \ubaa8\ub4e0 \uc885\ub958\uc758 \uad6c\uc131 \uc124\uc815\uc744 \ud30c\uc545\ud558\uace0 \uc9c0\uc6d0\ub418\ub294 \uae30\ub2a5\uc744 \ud611\uc0c1\ud558\ub294 \ub9ce\uc740 \ud578\ub4e4\ub7ec\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ud604\uc7ac \uac01 \uac1c\ubcc4 \uc791\uc5c5\uc5d0\ub294 \uac1c\ubcc4\uc801\uc778 \uc2dc\uac04 \uc81c\ud55c\uc774 \uc5c6\uc73c\uba70, \ucd1d \uc608\uc0b0 \uce21\uba74\uc5d0\uc11c \uc5f0\uacb0 \ub2e8\uacc4\uac00 \ud5c8\uc6a9\ub418\ub294 \uc2dc\uac04\ubcf4\ub2e4 \uc624\ub798 \uac78\ub9ac\ub294 \uacbd\uc6b0 \uc5f0\uacb0 \ubcf4\ud638 \uc2dc\uac04 \uc81c\ud55c\uc774 \uc2dc\uc791\ub429\ub2c8\ub2e4.<\/p>\n<p>\ub530\ub77c\uc11c <span class=\"lang:default decode:true crayon-inline\">\uc5f0\uacb0 \uc2dc\uac04 \ucd08\uacfc \uc608\uc678<\/span>\u00a0 \uba54\uc2dc\uc9c0\uc640 \ud568\uaed8 \ub85c\uadf8\uc5d0 <span class=\"lang:default decode:true crayon-inline\">Connect callback did not return, hit safeguarding timeout.<\/span>\u00a0 \ub294 \ud558\ub098\uc758 \uc791\uc5c5 \ub610\ub294 \ubaa8\ub4e0 \uc791\uc5c5\uc758 \ud569\uc774 \uc608\uc0b0\ubcf4\ub2e4 \uc624\ub798 \uac78\ub838\uc73c\uba70 \ub2e4\ub978 \uc7ac\uc5f0\uacb0 \uc2dc\ub3c4\uac00 \uc218\ud589\ub41c\ub2e4\ub294 \uc758\ubbf8\uc785\ub2c8\ub2e4. \ub2e4\uc2dc \uc5f0\uacb0\ud558\uae30 \ub54c\ubb38\uc5d0 \uc77c\ubc18\uc801\uc73c\ub85c\ub294 \ubb38\uc81c\uac00 \ub418\uc9c0 \uc54a\uc9c0\ub9cc \ub124\ud2b8\uc6cc\ud06c \ub610\ub294 \uc2a4\ud0dd\uc758 \ub2e4\ub978 \uacf3\uc5d0\uc11c \uc18d\ub3c4\uac00 \ub290\ub824\uc9c8 \uc218 \uc788\uc73c\ubbc0\ub85c \ub354 \uc8fc\uc758 \uae4a\uac8c \uc0b4\ud3b4\ubd10\uc57c \ud55c\ub2e4\ub294 \uc88b\uc740 \uc2e0\ud638\uc785\ub2c8\ub2e4. \uc88b\uc740 \ub2e4\uc74c \ub2e8\uacc4\ub294 \ub2e4\uc74c\uc744 \uc2dc\uc791\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. <a href=\"https:\/\/www.wireshark.org\/\">\uc640\uc774\uc5b4\uc0e4\ud06c<\/a> \/ <a href=\"https:\/\/www.tcpdump.org\/\">tcpdump<\/a> \ub97c \ud074\ub9ad\ud558\uace0 \ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \ub2e8\uacc4\ub97c \uae30\ub85d\ud558\uc5ec \uc2dc\uac04\uc774 \uc18c\uc694\ub418\ub294 \uc704\uce58\ub97c \ud30c\uc545\ud55c \ub2e4\uc74c \uae30\ub85d\ub41c \ud0c0\uc774\ubc0d\uc5d0 \ub530\ub77c \ud074\ub77c\uc774\uc5b8\ud2b8 \ub610\ub294 \uc11c\ubc84 \uce21\uc73c\ub85c \ud53c\ubc97\ud569\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc73c\ub85c \uc138\uc774\ud504\uac00\ub4dc \ud0c0\uc784\uc544\uc6c3\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uad6c\uc131\ub429\ub2c8\ub2e4. <span class=\"lang:default decode:true crayon-inline\">\uc18c\ucf13 \uc5f0\uacb0 \uc2dc\uac04 \ucd08\uacfc<\/span>\u00a0 \ud50c\ub7ec\uc2a4 <span class=\"lang:default decode:true crayon-inline\">\uc5f0\uacb0 \ucf5c\ubc31 \uc720\uc608 \uae30\uac04<\/span>\u00a0 \ub85c \uc124\uc815\ub418\uc5b4 \uc788\uc73c\uba70 2\ucd08\ub85c \uc870\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. <span class=\"lang:default decode:true crayon-inline\">com.couchbase.connectCallbackGracePeriod<\/span>\u00a0 \uc2dc\uc2a4\ud15c \uc18d\uc131\uc785\ub2c8\ub2e4.<\/p>\n<p>RBAC(\uc5ed\ud560 \uae30\ubc18 \uc561\uc138\uc2a4 \uc81c\uc5b4)\uc5d0 \ub300\ud55c \uc9c0\uc6d0\uc744 \ucd94\uac00\ud55c \uc774\ud6c4 \ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \uc911 \ub2e8\uacc4 \uc911 \ud558\ub098\uc778 \"\ubc84\ud0b7 \uc120\ud0dd\"\uc740 <span class=\"lang:default decode:true crayon-inline\">\ud0a4\uac12 \uc120\ud0dd \ubc84\ud0b7 \ud578\ub4e4\ub7ec<\/span>\u00a0. \uc778\uc99d\uacfc \ubc84\ud0b7\uc5d0 \ub300\ud55c \uc561\uc138\uc2a4 \uc0ac\uc774\uc5d0 \ub2e8\uc808\uc774 \uc788\uae30 \ub54c\ubb38\uc5d0 \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 KV \uc11c\ube44\uc2a4\uc5d0 \uc5f0\uacb0\ud588\uc9c0\ub9cc KV \uc5d4\uc9c4 \uc790\uccb4\uac00 \uc544\uc9c1 \uc11c\ube44\uc2a4\ub97c \uc81c\uacf5\ud560 \uc900\ube44\uac00 \ub418\uc9c0 \uc54a\uc558\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc0c1\ud669\uc744 \uc815\uc0c1\uc801\uc73c\ub85c \ucc98\ub9ac\ud558\uace0 \uc7ac\uc2dc\ub3c4\ud558\uba70 \uc2e4\uc81c \uc6cc\ud06c\ub85c\ub4dc\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc740 \uad00\ucc30\ub418\uc9c0 \uc54a\uc9c0\ub9cc \ub85c\uadf8 \uc704\uc0dd\ub3c4 \ubb38\uc81c\uc774\ubbc0\ub85c \ud604\uc7ac \uc5ec\uae30\uc5d0\uc11c SDK \uc54c\uace0\ub9ac\uc998\uc744 \uac1c\uc120\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc6d0\ud558\ub294 \uacbd\uc6b0 \ub2e4\uc74c\uc5d0\uc11c \uc9c4\ud589 \uc0c1\ud669\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<a href=\"https:\/\/issues.couchbase.com\/browse\/JVMCBC-553\"> JVMCBC-553<\/a>.<\/p>\n<h2>\ucd5c\uc885 \uc0dd\uac01<\/h2>\n<p>\uc774\uc81c SDK\uac00 \uae30\ubcf8 \uc18c\ucf13\uc744 \uad00\ub9ac\ud558\uace0 \uc11c\ube44\uc2a4 \uacc4\uce35\uc5d0\uc11c \ud480\ub9c1\ud558\ub294 \ubc29\ubc95\uc744 \ud655\uc2e4\ud788 \uc774\ud574\ud558\uc168\uc744 \uac83\uc785\ub2c8\ub2e4. \ucf54\ub4dc\ubca0\uc774\uc2a4\ub97c \uc790\uc138\ud788 \uc0b4\ud3b4\ubcf4\uace0 \uc2f6\ub2e4\uba74 \ub2e4\uc74c\uc744 \uc2dc\uc791\ud558\uc138\uc694. <a href=\"https:\/\/github.com\/couchbase\/couchbase-jvm-core\/tree\/master\/src\/main\/java\/com\/couchbase\/client\/core\">\uc5ec\uae30<\/a>\u00a0\uc5d0 \ub300\ud55c \uac01 \ub124\uc784\uc2a4\ud398\uc774\uc2a4\ub97c \uc0b4\ud3b4\ubcf8 \ub2e4\uc74c <span class=\"lang:default decode:true crayon-inline\">\uc11c\ube44\uc2a4<\/span>\u00a0 \uadf8\ub9ac\uace0 <span class=\"lang:default decode:true crayon-inline\">\uc5d4\ub4dc\ud3ec\uc778\ud2b8<\/span>\u00a0. \ubaa8\ub4e0 Netty \ucc44\ub110 \ud578\ub4e4\ub7ec\ub294 <span class=\"lang:default decode:true crayon-inline\">\uc5d4\ub4dc\ud3ec\uc778\ud2b8<\/span>\u00a0 \ub124\uc784\uc2a4\ud398\uc774\uc2a4\ub3c4 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ucd94\uac00 \uc9c8\ubb38\uc774 \uc788\uc73c\uc2dc\uba74 \uc544\ub798\uc5d0 \ub313\uae00\uc744 \ub2ec\uc544\uc8fc\uc138\uc694! \ub2e4\uc74c \uae00\uc5d0\uc11c\ub294 SDK\uc758 \uc804\ubc18\uc801\uc778 \uc2a4\ub808\ub529 \ubaa8\ub378\uc5d0 \ub300\ud574 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>","protected":false},"excerpt":{"rendered":"<p>In this second instalment of &#8220;Inside the Java SDK&#8221; we are going to take an in-depth look at how the SDK manages and pools sockets to the various nodes and services. While not ultimately necessary to follow, I recommend you [&hellip;]<\/p>","protected":false},"author":19,"featured_media":13873,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1821,1818,2201],"tags":[],"ppma_author":[8987],"class_list":["post-5432","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-couchbase-architecture","category-java","category-tools-sdks"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.8 (Yoast SEO v25.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Inside the Java SDK: Connection Management - The Couchbase Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/ko\/inside-the-java-sdk-connection-management\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inside the Java SDK: Connection Management\" \/>\n<meta property=\"og:description\" content=\"In this second instalment of &#8220;Inside the Java SDK&#8221; we are going to take an in-depth look at how the SDK manages and pools sockets to the various nodes and services. 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