thierry accart created SPARK-30190:
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Summary: HistoryServerDiskManager will fail on appStoreDir in s3
Key: SPARK-30190
URL: https://issues.apache.org/jira/browse/SPARK-30190
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.4.4
Reporter: thierry accart
Hi
While setting spark.eventLog.dir to s3a://... I realized that it *requires
destination directory to preexists for S3*
This is explained I think in HistoryServerDiskManager's appStoreDir: it tries
check if directory exists or can be created
{{if (!appStoreDir.isDirectory() && !appStoreDir.mkdir()) \{throw new
IllegalArgumentException(s"Failed to create app directory ($appStoreDir).")}}}
But in S3, a directory does not exists and cannot be created: directories don't
exists by themselves, they are only materialized due to existence of objects.
Before proposing a patch, I wanted to know what are the prefered options :
should we have a spark option to skip the appStoreDir test, or skip it only
when a particular scheme is set, have a custom implementation of
HistoryServerDiskManager ...?
_Note for people facing the {{IllegalArgumentException:}} {{Failed to create
app directory}} *you just have to put an empty file in bucket destination
'path'*._
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