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https://issues.apache.org/jira/browse/HADOOP-19743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18039111#comment-18039111
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ASF GitHub Bot commented on HADOOP-19743:
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steveloughran merged PR #8087:
URL: https://github.com/apache/hadoop/pull/8087
> S3A: ITestS3ACommitterMRJob MR process OOM on java17
> ----------------------------------------------------
>
> Key: HADOOP-19743
> URL: https://issues.apache.org/jira/browse/HADOOP-19743
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3, test
> Affects Versions: 3.5.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Labels: pull-request-available
>
> MR AppMaster launched by S3ACommitterMRJob can OOM on java17 while launching
> because the heap size is set for all forked processes to 128M.
> {code}
> ava.lang.OutOfMemoryError: Java heap space
> at
> java.base/java.io.BufferedOutputStream.<init>(BufferedOutputStream.java:75)
> at
> org.apache.hadoop.fs.statistics.BufferedIOStatisticsOutputStream.<init>(BufferedIOStatisticsOutputStream.java:78)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:629)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:660)
> {code}
> Fix: double it. Why not larger? increases memory footprint and in parallel
> test runs with many junit threads running there's a lot of load on memory
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