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https://issues.apache.org/jira/browse/SPARK-19013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu resolved SPARK-19013.
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Resolution: Not A Problem
This is basically a S3 problem, not a Spark one.
> java.util.ConcurrentModificationException when using s3 path as
> checkpointLocation
> -----------------------------------------------------------------------------------
>
> Key: SPARK-19013
> URL: https://issues.apache.org/jira/browse/SPARK-19013
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 2.0.2
> Reporter: Tim Chan
>
> I have a structured stream job running on EMR. The job will fail due to this
> ```
> Multiple HDFSMetadataLog are using s3://mybucket/myapp
> org.apache.spark.sql.execution.streaming.HDFSMetadataLog.org$apache$spark$sql$execution$streaming$HDFSMetadataLog$$writeBatch(HDFSMetadataLog.scala:162)
> ```
> There is only one instance of this stream job running.
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