[
https://issues.apache.org/jira/browse/SPARK-23989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16439231#comment-16439231
]
liuxian commented on SPARK-23989:
---------------------------------
For {color:#333333}`SortShuffleWriter`{color}, `records:
{color:#4e807d}Iterator{color}[Product2[{color:#4e807d}K{color}{color:#cc7832},
{color}{color:#4e807d}V{color}]]` is key-value pair, but the value is
'UnsafeRow' type.
For example ,we insert the first record {color:#333333}into
`PartitionedPairBuffer`, we only save the '{color:#cc7832}AnyRef{color}',
but the {color:#333333} '{color:#cc7832}AnyRef{color}'{color} of next
{color}record(only value, not key) is same as the first record , so the first
record is overwritten.
h1. overwritten
> When using `SortShuffleWriter`, the data will be overwritten
> ------------------------------------------------------------
>
> Key: SPARK-23989
> URL: https://issues.apache.org/jira/browse/SPARK-23989
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: liuxian
> Priority: Critical
>
> {color:#333333}When using `SortShuffleWriter`, we only insert
> '{color}{color:#cc7832}AnyRef{color}{color:#333333}' into
> '{color}PartitionedAppendOnlyMap{color:#333333}' or
> '{color}PartitionedPairBuffer{color:#333333}'.{color}
> {color:#333333}For this function:{color}
> {color:#cc7832}override def {color}{color:#ffc66d}write{color}(records:
> {color:#4e807d}Iterator{color}[Product2[{color:#4e807d}K{color}{color:#cc7832},
> {color}{color:#4e807d}V{color}]])
> the value of 'records' is `UnsafeRow`, so the value will be overwritten
> {color:#333333} {color}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
