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+---
+draft: false
+title: 'Learning Apache Flink S01E03: Running my First Flink Cluster and Application'
+date: "2023-10-05T14:29:02Z"
+image: "/images/2023/10/h_IMG_8835.webp"
+thumbnail: "/images/2023/10/t_IMG_5439.webp"
+credit: "https://twitter.com/rmoff/"
+categories:
+- LAF
+- Apache Flink
+---
+
+🎉 I just ran my first Apache Flink cluster and application on it 🎉
+
+<!--more-->
+
+![](/images/2023/10/flinkrun.webp)
+
+
+I followed the [**First Steps** quickstart from the Flink docs](https://nightlies.apache.org/flink/flink-docs-release-1.17/docs/try-flink/local_installation/) which is a nicely-paced walk through: 
+
+0️⃣ make sure you've got Java 11
+
+1️⃣ install Flink ([download](https://flink.apache.org/downloads/), unpack (with a [little detour](/2023/10/04/cd-string-not-in-pwd/)))
+
+2️⃣ run it (`./bin/start-cluster.sh`)
+
+3️⃣ submit the sample WordCount app
+
+4️⃣ see the execution in the web UI
+
+5️⃣ examine the output
+
+![](/images/2023/10/flinktail.webp)
+
+
+The WebUI is a nice touch - sometimes just running everything on the CLI gives you a technically correct finish but if you're new to something leaves you underwhelmed. The webUI lets you click around a bit and start to get a feel for what's going on. 
+
+![The Flink web UI](/images/2023/10/flinkui01.webp)
+
+![The Flink web UI](/images/2023/10/flinkui02.webp)
+
+You can find the source for the WordCount app [here](https://github.com/apache/flink/blob/release-1.17/flink-examples/flink-examples-batch/src/main/java/org/apache/flink/examples/java/wordcount/WordCount.java), and further tutorials on Flink [here](https://nightlies.apache.org/flink/flink-docs-release-1.17/docs/try-flink/local_installation/).
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