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      "author": "steemitboard",
      "permlink": "steemitboard-notify-qfrank-20191122t105402000z",
      "title": "",
      "body": "Congratulations @qfrank! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@qfrank/birthday2.png</td><td>Happy Birthday! - You are on the Steem blockchain for 2 years!</td></tr></table>\n\n<sub>_You can view [your badges on your Steem Board](https://steemitboard.com/@qfrank) and compare to others on the [Steem Ranking](https://steemitboard.com/ranking/index.php?name=qfrank)_</sub>\n\n\n###### [Vote for @Steemitboard as a witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1) to get one more award and increased upvotes!",
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      "body": "Hello @qfrank! This is a friendly reminder that you have 3000 Partiko Points unclaimed in your Partiko account!\n\nPartiko is a fast and beautiful mobile app for Steem, and it’s the most popular Steem mobile app out there! Download Partiko using the link below and login using SteemConnect to claim your 3000 Partiko points! You can easily convert them into Steem token!\n\nhttps://partiko.app/referral/partiko",
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      "parent_author": "",
      "parent_permlink": "status-node",
      "author": "qfrank",
      "permlink": "docker-status",
      "title": "使用docker运行status节点",
      "body": "##### 配置要求\n- 内存>=1GB\n- CPU>=1核\n- 硬盘空间 \n   如果开启`-mailserver`选项，[文档](https://status.im/docs/run_status_node.html)中描述的是一个月大约消耗600MB的空间；如果不开启`-mailserver`选项则无此消耗，节点将仅用作`Whisper`消息服务器\n- 操作系统 \n  只要可以运行docker理论上应该都可以，**注：此文以linux系统为例**\n\n关于如何安装docker，此处略过，具体步骤可参见[docker官网](https://docs.docker.com/install/linux/docker-ce/centos/)\n\n##### 运行节点\n1. 创建http-enabled.json文件\n    `echo '{\n    \"HTTPEnabled\": true,\n    \"HTTPHost\": \"0.0.0.0\",\n    \"APIModules\": \"admin,debug\"\n}' > http-enabled.json`\n2. 拉取并启动status节点docker镜像\n```\n    docker run --rm \\\n    -p 8545:8545 \\\n    -p 30303:30303 \\\n    -v $(pwd)/http-enabled.json:/config/config.json \\\n    statusteam/status-go \\\n    -register \\\n    -mailserver \\\n    -log DEBUG \\\n    -c /config/config.json \n```\n--- \n##### 校验节点是否运行正常\n执行如下命令：\n\n```\ncurl -X POST \\\n    -H \"Content-Type: application/json\" \\\n    -d '{\"jsonrpc\":\"2.0\",\"method\":\"admin_peers\",\"params\":[],\"id\":1}' \\\n    localhost:8545\n```\n，正常的话你将看到类似如下响应：\n```\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":[{\"enode\":\"enode://a80eb084f6bf3f98bf6a492fd6ba3db636986b17643695f67f543115d93d69920fb72e349e0c617a01544764f09375bb85f452b9c750a892d01d0e627d9c251e@47.89.16.125:30305?discport=0\",\"id\":\"36f613e54cb8412a1830fffd5c0b4099b1b9c107d6ab7104a27367b29fd5178b\",\"name\":\"Statusd/vdeploy-staging/linux-amd64/go1.10.8\",\"caps\":[\"shh/6\"],\"network\":{\"localAddress\":\"172.17.0.2:56732\",\"remoteAddress\":\"47.89.16.125:30305\",\"inbound\":false,\"trusted\":false,\"static\":true},\"protocols\":{\"shh\":\"unknown\"}},{\"enode\":\"enode://960777f01b7dcda7c58319e3aded317a127f686631b1702a7168ad408b8f8b7616272d805ddfab7a5a6bc4bd07ae92c03e23b4b8cd4bf858d0f74d563ec76c9f@47.52.58.213:30305\",\"id\":\"781b904d6468f2c996ed15d4a16a7b7d248e995b03e6b98bdd4fb62a444ec8a0\",\"name\":\"Statusd/vdeploy-staging/linux-amd64/go1.10.8\",\"caps\":[\"shh/6\"],\"network\":{\"localAddress\":\"172.17.0.2:41148\",\"remoteAddress\":\"47.52.58.213:30305\",\"inbound\":false,\"trusted\":false,\"static\":true},\"protocols\":{\"shh\":\"unknown\"}},{\"enode\":\"enode://7c80e37f324bbc767d890e6381854ef9985d33940285413311e8b5927bf47702afa40cd5d34be9aa6183ac467009b9545e24b0d0bc54ef2b773547bb8c274192@47.91.155.62:30305?discport=0\",\"id\":\"84d828cecc6d7fa6e4f831501e528f8593999d9972d4e5b46a22defb5fe554b2\",\"name\":\"Statusd/vdeploy-staging/linux-amd64/go1.10.8\",\"caps\":[\"shh/6\"],\"network\":{\"localAddress\":\"172.17.0.2:39454\",\"remoteAddress\":\"47.91.155.62:30305\",\"inbound\":false,\"trusted\":false,\"static\":true},\"protocols\":{\"shh\":\"unknown\"}}]}\n```\n ---\n##### `-mailserver`选项\n打开`-mailserver`开关默认会加载如下配置：\n```\n{\n    \"WhisperConfig\": {\n        \"Enabled\": true,\n        \"EnableNTPSync\": true,\n        \"EnableMailServer\": true,\n        \"MailServerPassword\": \"status-offline-inbox\"\n    }\n}\n```\n 其中的`MailServerPassword`正如其命名，是邮件服务器的密码，在后面会用到。\n\n---\n##### status手机端app添加自定义邮件服务器\n以ios版本为例，邮件服务器的设置菜单路径：\n`个人资料`-->`高级`-->`邮件服务器`，点击右上角的加号`+`进行添加，`名称`自己随便定，其中邮件服务器地址格式模板为：`enode://{enode-id}:{password}@{ip-address}:{port}`，这个地址在节点启动的时候会在日志中输出，例如其日志内容类似如下：\n```\nINFO [02-15|09:20:35.006] UDP listener up                          net=enode://d848d1f3c12b07419860d7f9409c601c334ae6d9283f6395e050dc3a7a00e7e12d06d4fc54d1d47a407a92723cdab5d963959908a4922ff6e9f30118bc79b2a0@[::]:30303\n```\n假设节点机器的ip为`47.244.23.30`，则对应的实际邮件地址我们应该填写为：`enode://d848d1f3c12b07419860d7f9409c601c334ae6d9283f6395e050dc3a7a00e7e12d06d4fc54d1d47a407a92723cdab5d963959908a4922ff6e9f30118bc79b2a0:[email protected]:30303`\n***注意：***在选择使用自定义的邮件服务器后，app可能会要求你重新输入密码登录\n---\n##### 使用自建节点的好处\n- 连接更稳定；app默认提供的列表节点可能在国外，我这边的使用情况是经常提示Error connect to mail server...\n- 接收消息速度加快\n- 去中心化\n\n---\n\n如果觉得这篇文章对你有用，欢迎使用snt打赏哦，本人的status联系地址：https://get.status.im/user/0x04fc558da36a9b88eb208a31f94729a9d0494e86deebde69503809084ef14eecc83bd2cab4cceaa93def8f6e9021ca7f1eb507ab3d47dd18661b8614d967b40e77\n\n---\n参考资料：https://status.im/docs/run_status_node.html",
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      "parent_author": "qfrank",
      "parent_permlink": "closewait",
      "author": "steemitboard",
      "permlink": "steemitboard-notify-qfrank-20181122t100505000z",
      "title": "",
      "body": "Congratulations @qfrank! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@qfrank/birthday1.png</td><td>1 Year on Steemit</td></tr></table>\n\n<sub>_[Click here to view your Board of Honor](https://steemitboard.com/@qfrank)_</sub>\n\n\n**Do not miss the last post from @steemitboard:**\n<table><tr><td><a href=\"https://steemit.com/steemfest/@steemitboard/meet-the-steemians-contest-the-results-the-winners-and-the-prizes\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmeLukvNFRsa7RURqsFpiLGEZZD49MiU52JtWmjS5S2wtW/image.png\"></a></td><td><a href=\"https://steemit.com/steemfest/@steemitboard/meet-the-steemians-contest-the-results-the-winners-and-the-prizes\">Meet the Steemians Contest - The results, the winners and the prizes</a></td></tr><tr><td><a href=\"https://steemit.com/steemfest/@steemitboard/meet-the-steemians-contest-special-attendees-revealed\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmeLukvNFRsa7RURqsFpiLGEZZD49MiU52JtWmjS5S2wtW/image.png\"></a></td><td><a href=\"https://steemit.com/steemfest/@steemitboard/meet-the-steemians-contest-special-attendees-revealed\">Meet the Steemians Contest - Special attendees revealed</a></td></tr><tr><td><a href=\"https://steemit.com/steemfest/@steemitboard/meet-the-steemians-contest-intermediate-results\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmeLukvNFRsa7RURqsFpiLGEZZD49MiU52JtWmjS5S2wtW/image.png\"></a></td><td><a href=\"https://steemit.com/steemfest/@steemitboard/meet-the-steemians-contest-intermediate-results\">Meet the Steemians Contest - Intermediate results</a></td></tr></table>\n\n> Support [SteemitBoard's project](https://steemit.com/@steemitboard)! **[Vote for its witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1)** and **get one more award**!",
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      "body": "某天某时看见群里有人反馈说XX系统访问不了了，登录上去检查了下服务器的状态。\n\n##### 服务器故障时的特征\n- CPU正常\n- 内存正常\n- 网络出现大量CLOSE_WAIT连接状态\n- 应用日志文件无异常\n\n其中用到的网络连接统计命令：\n```\nnetstat -apn|grep 443|awk '{if($2 > 1) print $1\"\\t\"$2\"\\t\"$3\"\\t\"$4\"\\t\"$5\"\\t\"$6\"\\t\"$7}'|sort -k 2\n```\n#\n服务器上的应用程序是用`Java`编写，使用了tomcat，使用命令\n```\njcmd 20165 Thread.print > threads.log\n```\n#\n导出线程堆栈情况发现大量的WAITING状态线程，线程总数约200个，大部分线程调用堆栈都包含了`httpclient`包的调用，查看了对应的`Java`代码，发现如下写法：\n```\nHttpResponse res = httpClient.execute(post);\nif(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK){\n    //读取响应内容\n    resp = EntityUtils.toString(res.getEntity(), \"UTF-8\");\n}\nreturn resp;\n```\n\n##### 推测\n如果响应的res状态码不是200，resp对应的输入流是没有正常读取释放的；如果不正常释放，httpclient维护的连接池及单个主机连接数是会被消耗光的，最终出现新的http请求会一直阻塞，进而消耗掉tomcat所有的工作线程（默认工作线程200个左右与thread.log统计一致）。\n\n##### 问题复现\n略\n\n##### 解决方案\n在`if`条件后增加`else`处理，使用方法`org.apache.http.util.EntityUtils#consumeQuietly`对服务端返回的输入流进行读取消耗。\n\n##### 参考资料\n[服务器TIME_WAIT和CLOSE_WAIT详解和解决办法](https://www.cnblogs.com/sunxucool/p/3449068.html)：",
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