[jira] [Created] (SPARK-27505) autoBroadcastJoinThreshold including bigger table

["Mike Chan (JIRA)" <ji...@apache.org>]

Mike Chan created SPARK-27505:
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             Summary: autoBroadcastJoinThreshold including bigger table
                 Key: SPARK-27505
                 URL: https://issues.apache.org/jira/browse/SPARK-27505
             Project: Spark
          Issue Type: Question
          Components: PySpark
    Affects Versions: 2.3.1
         Environment: Hive table with Spark 2.3.1 on Azure, using Azure storage as storage layer
            Reporter: Mike Chan


I'm on a case that when certain table being exposed to broadcast join, the query will eventually failed with remote block error. 
 
Firstly. We set the spark.sql.autoBroadcastJoinThreshold to 10MB, namely 10485760
!https://mail.google.com/mail/u/1?ui=2&ik=6f09461656&attid=0.0.2&permmsgid=msg-a:r2073778291349183964&th=16a2fd58ea74551c&view=fimg&sz=s0-l75-ft&attbid=ANGjdJ96l-PZQKRrU2lSlUA7MGbz1DAK62y0fMFOG07rfgI3oXkalm4An9eHtd6hX3hsKDd9EJK46cGTaqj_qKVrzs7xLyJgvx8XHuu36HSSfBtxW9OnrckzikIDRPI&disp=emb&realattid=ii_jumg5jxd1|width=542,height=66!
 
Then we proceed to perform query. In the SQL plan, we found that one table that is 25MB in size is broadcast as well.
 
!https://mail.google.com/mail/u/1?ui=2&ik=6f09461656&attid=0.0.1&permmsgid=msg-a:r2073778291349183964&th=16a2fd58ea74551c&view=fimg&sz=s0-l75-ft&attbid=ANGjdJ_Fx_sEOI2n4yYfOn0gCUYqFYMDrxsSzd-S9ehtl67Imi87NN3y8cCFUOrHwKYO3MTfi3LVCIGg7J9jEuqnlqa76pvrUaAzEKSUm9VtBoH-Zsf9qepJiS4NKLE&disp=emb&realattid=ii_jumg53fq0|width=227,height=542!
 
Also in desc extended the table is 24452111 bytes. It is a Hive table. We always ran into error when this table being broadcast. Below is the sample error
 
Caused by: java.io.IOException: org.apache.spark.SparkException: corrupt remote block broadcast_477_piece0 of broadcast_477: 298778625 != -992055931 at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1350) at org.apache.spark.broadcast.TorrentBroadcast.readBroadcastBlock(TorrentBroadcast.scala:207) at org.apache.spark.broadcast.TorrentBroadcast._value$lzycompute(TorrentBroadcast.scala:66) at org.apache.spark.broadcast.TorrentBroadcast._value(TorrentBroadcast.scala:66) at org.apache.spark.broadcast.TorrentBroadcast.getValue(TorrentBroadcast.scala:96)

 
Also attached the physical plan if you're interested. One thing to note that, if I turn down autoBroadcastJoinThreshold{color:#000000}to 5MB, this query will get successfully executed and default.product NOT broadcasted.{color}
{color:#000000}
{color}{color:#000000}However, when I change to another query that querying even less columns than pervious one, even in 5MB this table still get broadcasted and failed with the same error. I even changed to 1MB and still the same. {color}



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