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Problem There are time we would want to remove a ZK node in a secure cluster which is ACL protected. Something as below ACLs [zk: xyz.com:2181(CONNECT 阅读全文
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while I add catalogs in sql-gateway-defaults.yaml: catalogs: name: catalog_hive type: hive hive-conf-dir: /opt/software/flink-sql-gateway-0.1-SNAPSHOT 阅读全文
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14 Jul 2020 Kostas Kloudas (@kkloudas) With the rise of stream processing and real-time analytics as a critical tool for modern businesses, an increas 阅读全文
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7 3 I'm trying to save dataframe in table hive. In spark 1.6 it's work but after migration to 2.2.0 it doesn't work anymore. Here's the code: blocs .t 阅读全文
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6 2 I am submitting a job to YARN (on spark 2.1.1 + kafka 0.10.2.1) which connects to a secured hbase cluster. This job, performs just fine when i am 阅读全文
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详细报错日志 org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: Unable to instantiate java compiler at org.apache. 阅读全文
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Large states in our workload makes it infeasible to maintain everything in memory. Thus, we rely heavily on the RocksDB state backend to manage our gr 阅读全文
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An Intro to Stateful Stream Processing At a high level, we can consider state in stream processing as memory in operators that remembers information a 阅读全文
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This episode of our Flink Friday Tip explores stateful stream processing and more precisely the different state backends available in Apache Flink. In 阅读全文
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This blog post describes some configuration options that will help you to efficiently manage the memory size of the RocksDB state backend in Apache Fl 阅读全文
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Ververica was founded by the original creators of Apache Flink®, and we’ve spent a long time solving problems in the stream processing space. In this 阅读全文
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mapper文件中写sql语句时提示Tag name expected,找到原因是因为xml不识别<号需要用特定转义符来表示<号。 <select id="selectHavingOrtherResultNotYetProcessed" resultMap="BaseResultMap" > sel 阅读全文
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Kafka Broker: Java Version We recommend latest java 1.8 with G1 collector ( which is default in new version). If you are using Java 1.7 and G1 collect 阅读全文
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Introduction The producer sends data directly to the broker that is the leader for the partition without any intervening routing tier. Optimization Ap 阅读全文
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Introduction Knowing the performance of Kafka in general or on your hardware is an important part of capacity planning. Sizing can be hard to calculat 阅读全文