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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/12/11 09:59:00 UTC
[jira] [Assigned] (SPARK-33756) BytesToBytesMap's iterator hasNext
method should be idempotent.
[ https://issues.apache.org/jira/browse/SPARK-33756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-33756:
------------------------------------
Assignee: (was: Apache Spark)
> BytesToBytesMap's iterator hasNext method should be idempotent.
> ---------------------------------------------------------------
>
> Key: SPARK-33756
> URL: https://issues.apache.org/jira/browse/SPARK-33756
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Xianjin YE
> Priority: Minor
>
> BytesToBytesMap's MapIterator's hasNext method is not idempotent.
> {code:java}
> //
> public boolean hasNext() {
> if (numRecords == 0) {
> if (reader != null) {
> // if called multiple multiple times, it will throw NoSuchElement exception
> handleFailedDelete();
> }
> }
> return numRecords > 0;
> }
> {code}
> Multiple calls to this `hasNext` method will call `handleFailedDelete()` multiple times, which will throw NoSuchElementException as the spillWrites has already been empty.
>
> We observed this issue for in one of our production jobs after upgrading to Spark 3.0
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