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Posted to issues@spark.apache.org by "Leanken.Lin (Jira)" <ji...@apache.org> on 2020/08/26 07:35:00 UTC

[jira] [Created] (SPARK-32705) EmptyHashedRelation$; no valid constructor

Leanken.Lin created SPARK-32705:
-----------------------------------

             Summary: EmptyHashedRelation$; no valid constructor
                 Key: SPARK-32705
                 URL: https://issues.apache.org/jira/browse/SPARK-32705
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Leanken.Lin


Current EmptyHashedRelation is object and it will cause JavaDeserialization Exception as follow

 
{code:java}
// Stack
20/08/26 11:13:30 WARN [task-result-getter-2] TaskSetManager: Lost task 34.0 in stage 57.0 (TID 18076, emr-worker-5.cluster-183257, executor 18): java
.io.InvalidClassException: org.apache.spark.sql.execution.joins.EmptyHashedRelation$; no valid constructor
        at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(ObjectStreamClass.java:169)
        at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:874)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2042)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1572)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430)
        at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:76)
        at org.apache.spark.broadcast.TorrentBroadcast$.$anonfun$unBlockifyObject$4(TorrentBroadcast.scala:328)
        at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1377)
        at org.apache.spark.broadcast.TorrentBroadcast$.unBlockifyObject(TorrentBroadcast.scala:330)
        at org.apache.spark.broadcast.TorrentBroadcast.$anonfun$readBroadcastBlock$4(TorrentBroadcast.scala:249)
        at scala.Option.getOrElse(Option.scala:189)
        at org.apache.spark.broadcast.TorrentBroadcast.$anonfun$readBroadcastBlock$2(TorrentBroadcast.scala:223)
        at org.apache.spark.util.KeyLock.withLock(KeyLock.scala:64)
        at org.apache.spark.broadcast.TorrentBroadcast.$anonfun$readBroadcastBlock$1(TorrentBroadcast.scala:218)
        at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1343)

{code}
using case object instead to fix serialization issue. And also change EmptyHashedRelation not to extend NullAwareHashedRelation since it's already being used in other non-NAAJ joins.

 



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