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https://issues.apache.org/jira/browse/SPARK-10633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-10633.
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Resolution: Not A Problem
> Persisting Spark stream to MySQL - Spark tries to create the table for every
> stream even if it exist already.
> -------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-10633
> URL: https://issues.apache.org/jira/browse/SPARK-10633
> Project: Spark
> Issue Type: Bug
> Components: SQL, Streaming
> Affects Versions: 1.4.0, 1.5.0
> Environment: Ubuntu 14.04
> IntelliJ IDEA 14.1.4
> sbt
> mysql-connector-java 5.1.35 (Tested and working with Spark 1.3.1)
> Reporter: Lunen
>
> Persisting Spark Kafka stream to MySQL
> Spark 1.4 + tries to create a table automatically every time the stream gets
> sent to a specified table.
> Please note, Spark 1.3.1 works.
> Code sample:
> val url = "jdbc:mysql://host:port/db?user=user&password=password
> val crp = RowSetProvider.newFactory()
> val crsSql: CachedRowSet = crp.createCachedRowSet()
> val crsTrg: CachedRowSet = crp.createCachedRowSet()
> crsSql.beforeFirst()
> crsTrg.beforeFirst()
> //Read Stream from Kafka
> //Produce SQL INSERT STRING
>
> streamT.foreachRDD { rdd =>
> if (rdd.toLocalIterator.nonEmpty) {
> sqlContext.read.json(rdd).registerTempTable(serverEvents + "_events")
> while (crsSql.next) {
> sqlContext.sql("SQL INSERT STRING").write.jdbc(url, "SCHEMA_NAME",
> new Properties)
> println("Persisted Data: " + 'SQL INSERT STRING')
> }
> crsSql.beforeFirst()
> }
> stmt.close()
> conn.close()
> }
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