[jira] [Created] (CARBONDATA-1991) Select query from a streaming table throws ClassCastException

[Akash R Nilugal (Jira)]

Geetika Gupta created CARBONDATA-1991:
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             Summary: Select query from a streaming table throws ClassCastException
                 Key: CARBONDATA-1991
                 URL: https://issues.apache.org/jira/browse/CARBONDATA-1991
             Project: CarbonData
          Issue Type: Bug
          Components: data-query
    Affects Versions: 1.3.0
         Environment: spark2.1
            Reporter: Geetika Gupta
             Fix For: 1.3.0
         Attachments: 2000_UniqData.csv

Start spark shell using:
./bin/spark-shell --jars carbonlib/carbondata_2.11-1.3.0-SNAPSHOT-shade-hadoop2.7.2.jar

Execute the following code:
 import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.CarbonSession._
val carbon = SparkSession.builder().config(sc.getConf) .getOrCreateCarbonSession("hdfs://localhost:54311/newCarbonStore","/tmp")

 carbon.sql("drop table if exists uniqdata_part")

carbon.sql("create table uniqdata_stream(CUST_ID int,CUST_NAME String,DOB timestamp,DOJ timestamp, BIGINT_COLUMN1 bigint,BIGINT_COLUMN2 bigint,DECIMAL_COLUMN1 decimal(30,10),DECIMAL_COLUMN2 decimal(36,10),Double_COLUMN1 double, Double_COLUMN2 double,INTEGER_COLUMN1 int) STORED BY 'org.apache.carbondata.format' TBLPROPERTIES ('TABLE_BLOCKSIZE'= '256 MB', 'streaming'='true')");
import carbon.sqlContext.implicits._

val lines = carbon.readStream
  .format("socket")
  .option("host", "localhost")
  .option("port", 9999)
  .load()

Now start a server socket using:
nc -lk 9999
and write the 2000_uniqdata.csv data to that terminal

Now execute the following on spark shell
val qry = lines.writeStream
             .format("carbondata")
             .option("checkpointLocation","/newtmp1")
            .option("dbName", "default")
            .option("tableName", "uniqdata_stream")
            .start()

          qry.awaitTermination()

Stop your socket and spark-shell when you are done with data writing,

Again start the spark-shell and perform the following query:
carbon.sql("select * from uniqdata_stream").show

It throws the following exception:
18/01/05 18:25:04 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0)
java.lang.ClassCastException: java.math.BigDecimal cannot be cast to org.apache.spark.sql.types.Decimal
        at org.apache.carbondata.hadoop.streaming.CarbonStreamRecordReader.putRowToColumnBatch(CarbonStreamRecordReader.java:702)
        at org.apache.carbondata.hadoop.streaming.CarbonStreamRecordReader.scanBlockletAndFillVector(CarbonStreamRecordReader.java:424)
        at org.apache.carbondata.hadoop.streaming.CarbonStreamRecordReader.nextColumnarBatch(CarbonStreamRecordReader.java:324)
        at org.apache.carbondata.hadoop.streaming.CarbonStreamRecordReader.nextKeyValue(CarbonStreamRecordReader.java:305)
        at org.apache.carbondata.spark.rdd.CarbonScanRDD$$anon$1.hasNext(CarbonScanRDD.scala:370)
        at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.scan_nextBatch$(Unknown Source)
        at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown Source)
        at org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
        at org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:377)
        at org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:231)
        at org.apache.spark.sql.execution.SparkPlan$$anonfun$2.apply(SparkPlan.scala:225)
        at org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$25.apply(RDD.scala:826)
        at org.apache.spark.rdd.RDD$$anonfun$mapPartitionsInternal$1$$anonfun$apply$25.apply(RDD.scala:826)
        at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
        at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:323)
        at org.apache.spark.rdd.RDD.iterator(RDD.scala:287)
        at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
        at org.apache.spark.scheduler.Task.run(Task.scala:99)
        at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:282)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)





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