{"id":46759,"date":"2023-11-23T04:40:15","date_gmt":"2024-02-11T13:19:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/46759-2\/"},"modified":"2024-05-04T10:24:09","modified_gmt":"2024-05-04T02:24:09","slug":"46759-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/46759-2\/","title":{"rendered":""},"content":{"rendered":"<p>td-agent\u30b3\u30f3\u30c6\u30ca\u3068Kafka Consumer\u30b3\u30f3\u30c6\u30ca\u3092\u4f7f\u3044Kafka\u304b\u3089Treasure Data\u3078\u30d6\u30ea\u30c3\u30b8\u3059\u308bDocker Compose\u30b5\u30fc\u30d3\u30b9\u3092\u8d77\u52d5\u3057\u307e\u3059\u3002\u5225\u306e\u30dd\u30b9\u30c8\u3067\u306fPySpark Streaming\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u96c6\u8a08\u3057\u305f\u7d50\u679c\u3092Kafka\u306e\u30c8\u30d4\u30c3\u30af\u306b\u51fa\u529b\u3059\u308b\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u306f\u30c7\u30fc\u30bf\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u524d\u51e6\u7406\u3084\u30a8\u30f3\u30ea\u30c3\u30c1\u30e1\u30f3\u30c8\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002\u5f8c\u7d9a\u306b\u30d3\u30c3\u30b0\u30c7\u30fc\u30bf\u306e\u30d0\u30c3\u30c1\u51e6\u7406\u3092\u60f3\u5b9a\u3057\u3066Treasure Data\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n<h2>Docker Compose<\/h2>\n<p>\u6700\u521d\u306b\u4eca\u56de\u4f5c\u6210\u3059\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u69cb\u6210\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>tree <span class=\"nt\">-a<\/span>\r\n<span class=\"nb\">.<\/span>\r\n\u251c\u2500\u2500 docker-compose.yml\r\n\u251c\u2500\u2500 .env\r\n\u251c\u2500\u2500 .gitignore\r\n\u251c\u2500\u2500 kafka-bridge\r\n\u2502\u00a0\u00a0 \u251c\u2500\u2500 Dockerfile\r\n\u2502\u00a0\u00a0 \u251c\u2500\u2500 fluentd-consumer.properties\r\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 log4j.properties\r\n\u2514\u2500\u2500 td-agent2\r\n    \u251c\u2500\u2500 Dockerfile\r\n    \u2514\u2500\u2500 td-agent.conf\r\n\r\n2 directories, 9 files\r\n\r\n<\/code><\/pre>\n<h3>docker-compose.yml<\/h3>\n<p>td-agent\u3068Kafka Consumer\u30b5\u30fc\u30d3\u30b9\u306f\u305d\u308c\u305e\u308cDockefile\u3092\u66f8\u3044\u3066\u30d3\u30eb\u30c9\u3057\u307e\u3059\u3002Kafka\u306flandoop\/fast-data-dev\u3092\u5229\u7528\u3057\u307e\u3059\u3002Confluent Open Source\u3092\u540c\u68b1\u3057\u3066\u3044\u308b\u305f\u3081Kafka\u3068ZooKeeper\u3082\u8d77\u52d5\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"na\">version<\/span><span class=\"pi\">:<\/span> <span class=\"s1\">'<\/span><span class=\"s\">2'<\/span>\r\n<span class=\"na\">services<\/span><span class=\"pi\">:<\/span>\r\n  <span class=\"na\">kafka-stack<\/span><span class=\"pi\">:<\/span>\r\n    <span class=\"na\">image<\/span><span class=\"pi\">:<\/span> <span class=\"s\">landoop\/fast-data-dev<\/span>\r\n    <span class=\"na\">environment<\/span><span class=\"pi\">:<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">FORWARDLOGS=0<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">RUNTESTS=0<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">ADV_HOST=&lt;\u4eee\u60f3\u30de\u30b7\u30f3\u306e\u30d1\u30d6\u30ea\u30c3\u30afIP\u30a2\u30c9\u30ec\u30b9&gt;<\/span>\r\n    <span class=\"na\">ports<\/span><span class=\"pi\">:<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">3030:3030<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">9092:9092<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">2181:2181<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">8081:8081<\/span>\r\n  <span class=\"na\">td-agent2<\/span><span class=\"pi\">:<\/span>\r\n    <span class=\"na\">build<\/span><span class=\"pi\">:<\/span> <span class=\"s\">.\/td-agent2<\/span>\r\n    <span class=\"na\">env_file<\/span><span class=\"pi\">:<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">.\/.env<\/span>\r\n    <span class=\"na\">ports<\/span><span class=\"pi\">:<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">24224:24224<\/span>\r\n  <span class=\"na\">kafka-bridge<\/span><span class=\"pi\">:<\/span>\r\n    <span class=\"na\">build<\/span><span class=\"pi\">:<\/span> <span class=\"s\">.\/kafka-bridge<\/span>\r\n    <span class=\"na\">depends_on<\/span><span class=\"pi\">:<\/span>\r\n      <span class=\"pi\">-<\/span> <span class=\"s\">td-agent<\/span>\r\n<\/code><\/pre>\n<h3>.env<\/h3>\n<p>Treasure Data\u306e\u63a5\u7d9a\u60c5\u5831\u306f\u74b0\u5883\u5909\u6570\u30d5\u30a1\u30a4\u30eb\u306e.env\u306b\u8a18\u8ff0\u3057Docker Compose\u304b\u3089\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>TD_API_KEY=&lt;YOUR API KEY&gt;\r\nTD_ENDPOINT=&lt;TD ENDPOINT&gt;\r\n<\/code><\/pre>\n<h2>td-agent2<\/h2>\n<p>td-agent\u306eDocker\u30a4\u30e1\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<h3>Dockerfile<\/h3>\n<p>Overview of Server-Side Agent (td-agent)\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u624b\u9806\u306b\u5f93\u3044\u307e\u3059\u3002install-ubuntu-xenial-td-agent2.sh\u306e\u4e2d\u3067\u306fsudo\u3082\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>FROM ubuntu:xenial\r\n\r\nRUN apt-get update &amp;&amp; apt-get install sudo curl -y\r\nRUN curl -L https:\/\/toolbelt.treasuredata.com\/sh\/install-ubuntu-xenial-td-agent2.sh | sh\r\nRUN apt-get clean &amp;&amp; rm -rf \/var\/lib\/apt\/lists\/* \/tmp\/* \/var\/tmp\/*\r\n\r\nADD td-agent.conf \/etc\/td-agent\/\r\nEXPOSE 24224\r\nCMD [\"\/usr\/sbin\/td-agent\"]\r\n<\/code><\/pre>\n<h3>td-agent.conf<\/h3>\n<p>td-agent.conf\u306f\u74b0\u5883\u5909\u6570\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Treasure Data\u3078\u306e\u63a5\u7d9a\u60c5\u5831\u3092.env\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;match td.*.*&gt;\r\n  @type tdlog\r\n  endpoint \"#{ENV['TD_ENDPOINT']}\"\r\n  apikey \"#{ENV['TD_API_KEY']}\"\r\n  auto_create_table\r\n  buffer_type file\r\n  buffer_path \/var\/log\/td-agent\/buffer\/td\r\n  use_ssl true\r\n  num_threads 8\r\n&lt;\/match&gt;\r\n\r\n&lt;source&gt;\r\n  @type forward\r\n&lt;\/source&gt;\r\n<\/code><\/pre>\n<h2>kafka-fluentd-consumer<\/h2>\n<p>Kafka\u304b\u3089Treasure Data\u3078\u306e\u30d6\u30ea\u30c3\u30b8\u306b\u306fkafka-fluentd-consumer\u306eJar\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<h3>Dockerfile<\/h3>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u306ekafka-fluentd-consumer-0.3.1-all.jar\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>FROM java:8-jre\r\nARG KAFKA_FLUENTD_CONSUMER_VERSION=0.3.1\r\n\r\nWORKDIR \/app\r\n\r\nRUN wget -q -O kafka-fluentd-consumer-all.jar https:\/\/github.com\/treasure-data\/kafka-fluentd-consumer\/releases\/download\/v$KAFKA_FLUENTD_CONSUMER_VERSION\/kafka-fluentd-consumer-$KAFKA_FLUENTD_CONSUMER_VERSION-all.jar\r\n\r\nADD log4j.properties .\r\nADD fluentd-consumer.properties .\r\n\r\nCMD [\"java\", \"-Dlog4j.configuration=file:\/\/\/app\/log4j.properties\", \"-jar\", \"kafka-fluentd-consumer-all.jar\", \"fluentd-consumer.properties\"]\r\n<\/code><\/pre>\n<h3>fluentd-consumer.properties<\/h3>\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u8a2d\u5b9a\u304b\u3089\u4ee5\u4e0b\u3092\u5909\u66f4\u3057\u307e\u3059\u3002fluentd.connect\u3068zookeeper.connect\u306fdocker-compose.yml\u3092\u4f7f\u3046\u5834\u5408\u306f\u305d\u308c\u305e\u308c\u30b5\u30fc\u30d3\u30b9\u540d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">fluentd.connect=:24224<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">fluentd.tag.prefix=td.&lt;\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u540d&gt;.<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">fluentd.consumer.topics=&lt;\u30c8\u30d4\u30c3\u30af\u540d&gt;<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">zookeeper.connect=:2181<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">group.id=&lt;\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30b0\u30eb\u30fc\u30d7\u540d&gt;<\/ul>\n<pre class=\"post-pre\"><code><span class=\"c\"># Fluentd instance destinations.\r\n<\/span><span class=\"py\">fluentd.connect<\/span><span class=\"p\">=<\/span><span class=\"s\">td-agent2:24224<\/span>\r\n\r\n<span class=\"c\"># Dynamic event tag with topic name. \r\n<\/span><span class=\"py\">fluentd.tag.prefix<\/span><span class=\"p\">=<\/span><span class=\"s\">td.sensortag_dev.<\/span>\r\n\r\n<span class=\"c\"># Consumed topics. \r\n<\/span><span class=\"py\">fluentd.consumer.topics<\/span><span class=\"p\">=<\/span><span class=\"s\">sensortag-sink<\/span>\r\n\r\n<span class=\"c\"># The number of threads per consumer streams\r\n<\/span><span class=\"py\">fluentd.consumer.threads<\/span><span class=\"p\">=<\/span><span class=\"s\">1<\/span>\r\n\r\n<span class=\"c\"># The path for backup un-flushed events during shutdown.\r\n<\/span><span class=\"py\">fluentd.consumer.backup.dir<\/span><span class=\"p\">=<\/span><span class=\"s\">\/tmp\/fluentd-consumer-backup\/<\/span>\r\n\r\n<span class=\"c\"># Kafka Consumer related parameters\r\n<\/span><span class=\"py\">zookeeper.connect<\/span><span class=\"p\">=<\/span><span class=\"s\">kafka-stack:2181<\/span>\r\n<span class=\"py\">group.id<\/span><span class=\"p\">=<\/span><span class=\"s\">my-sensortag-sink-group<\/span>\r\n<span class=\"py\">zookeeper.session.timeout.ms<\/span><span class=\"p\">=<\/span><span class=\"s\">400<\/span>\r\n<span class=\"py\">zookeeper.sync.time.ms<\/span><span class=\"p\">=<\/span><span class=\"s\">200<\/span>\r\n<span class=\"py\">auto.commit.interval.ms<\/span><span class=\"p\">=<\/span><span class=\"s\">1000<\/span>\r\n<\/code><\/pre>\n<h3>log4j.properties<\/h3>\n<p>log4j.properties\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u307e\u307e\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\"># log4j logging configuration.\r\n# This is based on Pinterest's secor\r\n<\/span>\r\n<span class=\"c\"># root logger.\r\n<\/span><span class=\"py\">log4j.rootLogger<\/span><span class=\"p\">=<\/span><span class=\"s\">DEBUG, ROLLINGFILE<\/span>\r\n\r\n<span class=\"py\">log4j.appender.ROLLINGFILE<\/span> <span class=\"p\">=<\/span> <span class=\"s\">org.apache.log4j.RollingFileAppender<\/span>\r\n<span class=\"py\">log4j.appender.ROLLINGFILE.Threshold<\/span><span class=\"p\">=<\/span><span class=\"s\">INFO<\/span>\r\n<span class=\"py\">log4j.appender.ROLLINGFILE.File<\/span><span class=\"p\">=<\/span><span class=\"s\">\/tmp\/fluentd-consumer.log<\/span>\r\n<span class=\"c\"># keep log files up to 1G\r\n<\/span><span class=\"py\">log4j.appender.ROLLINGFILE.MaxFileSize<\/span><span class=\"p\">=<\/span><span class=\"s\">20MB<\/span>\r\n<span class=\"py\">log4j.appender.ROLLINGFILE.MaxBackupIndex<\/span><span class=\"p\">=<\/span><span class=\"s\">50<\/span>\r\n<span class=\"py\">log4j.appender.ROLLINGFILE.layout<\/span><span class=\"p\">=<\/span><span class=\"s\">org.apache.log4j.PatternLayout<\/span>\r\n<span class=\"py\">log4j.appender.ROLLINGFILE.layout.ConversionPattern<\/span><span class=\"p\">=<\/span><span class=\"s\">%d{ISO8601} [%t] (%C:%L) %-5p %m%n<\/span>\r\n<\/code><\/pre>\n<h2>\u52d5\u4f5c\u78ba\u8a8d<\/h2>\n<p>Docker Compose\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u8d77\u52d5\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>docker-compose up <span class=\"nt\">-d<\/span>\r\n<\/code><\/pre>\n<p>td-agent\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>docker-compose <span class=\"nb\">exec <\/span>td-agent2 td-agent <span class=\"nt\">--version<\/span>\r\ntd-agent 0.12.35\r\n<\/code><\/pre>\n<p>Spark Streaming\u3092\u4f7f\u3063\u305f\u30a6\u30a3\u30f3\u30c9\u30a6\u96c6\u8a08\u306e\u30b5\u30f3\u30d7\u30eb\u306e\u3088\u3046\u306bfluentd.consumer.topics\u306b\u6307\u5b9a\u3057\u305ftopic\u3078JSON\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>\u30c6\u30b9\u30c8\u3068\u3057\u3066kafka-console-producer\u304b\u3089\u76f4\u63a5JSON\u3092\u9001\u4fe1\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>docker-compose <span class=\"nb\">exec <\/span>kafka-stack kafka-console-producer <span class=\"se\">\\<\/span>\r\n    <span class=\"nt\">--broker-list<\/span> localhost:9092 <span class=\"se\">\\<\/span>\r\n    <span class=\"nt\">--topic<\/span> sensortag-sink\r\n<\/code><\/pre>\n<p>\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u5f8c\u306e\u5f85\u6a5f\u72b6\u614b\u3067JSON\u6587\u5b57\u5217\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span><span class=\"nl\">\"bid\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"B0:B4:48:BD:DA:03\"<\/span><span class=\"p\">,<\/span> <span class=\"nl\">\"time\"<\/span><span class=\"p\">:<\/span> <span class=\"mi\">1501654353<\/span><span class=\"p\">,<\/span> <span class=\"nl\">\"humidity\"<\/span><span class=\"p\">:<\/span> <span class=\"mf\">27.152099609375<\/span><span class=\"p\">,<\/span> <span class=\"nl\">\"objecttemp\"<\/span><span class=\"p\">:<\/span> <span class=\"mf\">21.6875<\/span><span class=\"p\">,<\/span> <span class=\"nl\">\"ambient\"<\/span><span class=\"p\">:<\/span> <span class=\"mf\">27.09375<\/span><span class=\"p\">,<\/span> <span class=\"nl\">\"rh\"<\/span><span class=\"p\">:<\/span> <span class=\"mf\">78.4423828125<\/span><span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>td-agent\u306f\u30d5\u30a1\u30a4\u30eb\u30d0\u30c3\u30d5\u30a1\u3092\u4f5c\u6210\u3057\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f5\u5206\u9593\u9694\u3067Treasure Data\u3078\u30c7\u30fc\u30bf\u304c\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>docker-compose <span class=\"nb\">exec <\/span>td-agent2 <span class=\"nb\">ls<\/span> \/var\/log\/td-agent\/buffer\r\ntd.sensortag_dev.sensortag_sink.b555bf24951c65554.log\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d669437434c4406d0a9f8\/42-0.png\" alt=\"treasure-data.png\" \/><\/div>\n","protected":false},"excerpt":{"rendered":"<p>td-agent\u30b3\u30f3\u30c6\u30ca\u3068Kafka Consumer\u30b3\u30f3\u30c6\u30ca\u3092\u4f7f\u3044Kafka\u304b\u3089Treasure Data\u3078 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-46759","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/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.silicloud.com\/zh\/blog\/46759-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"td-agent\u30b3\u30f3\u30c6\u30ca\u3068Kafka Consumer\u30b3\u30f3\u30c6\u30ca\u3092\u4f7f\u3044Kafka\u304b\u3089Treasure Data\u3078 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/46759-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-11T13:19:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T02:24:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d669437434c4406d0a9f8\/42-0.png\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" 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