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  1. Spark
  2. SPARK-21287

Cannot use Int.MIN_VALUE as Spark SQL fetchsize

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.1.1, 2.2.3, 2.3.4, 2.4.4, 3.0.0
    • 2.4.5, 3.0.0
    • SQL
    • None

    Description

      MySQL JDBC driver gives possibility to not store ResultSet in memory.
      We can do this by setting fetchSize to Int.MIN_VALUE.
      Unfortunately this configuration isn't correct in Spark.

      java.lang.IllegalArgumentException: requirement failed: Invalid value `-2147483648` for parameter `fetchsize`. The minimum value is 0. When the value is 0, the JDBC driver ignores the value and does the estimates.
      	at scala.Predef$.require(Predef.scala:224)
      	at org.apache.spark.sql.execution.datasources.jdbc.JDBCOptions.<init>(JDBCOptions.scala:105)
      	at org.apache.spark.sql.execution.datasources.jdbc.JDBCOptions.<init>(JDBCOptions.scala:34)
      	at org.apache.spark.sql.execution.datasources.jdbc.JdbcRelationProvider.createRelation(JdbcRelationProvider.scala:32)
      	at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:330)
      	at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:152)
      	at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:125)
      	at org.apache.spark.sql.DataFrameReader.jdbc(DataFrameReader.scala:166)
      	at org.apache.spark.sql.DataFrameReader.jdbc(DataFrameReader.scala:206)
      	at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      	at java.lang.reflect.Method.invoke(Method.java:498)
      	at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
      	at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
      	at py4j.Gateway.invoke(Gateway.java:280)
      	at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
      	at py4j.commands.CallCommand.execute(CallCommand.java:79)
      	at py4j.GatewayConnection.run(GatewayConnection.java:214)
      	at java.lang.Thread.run(Thread.java:748)
      

      https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-reference-implementation-notes.html

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            wwg28103 Hu Fuwang
            maver1ck Maciej BryƄski
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            Dates

              Created:
              Updated:
              Resolved: