[
https://issues.apache.org/jira/browse/HADOOP-17414?focusedWorklogId=523166&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-523166
]
ASF GitHub Bot logged work on HADOOP-17414:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 11/Dec/20 12:08
Start Date: 11/Dec/20 12:08
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #2530:
URL: https://github.com/apache/hadoop/pull/2530#issuecomment-743157050
This is how the "-getfattr" command looks like against a non-magic-marker
file
```
bin/hadoop fs -getfattr -d
s3a://stevel-london/cloud-integration/DELAY_LISTING_ME/S3ACommitBulkDataSuite/bulkdata/output/landsat/parquet/parted-1/year=2016/month=10/part-00000-8b00c5f2-cd1f-4741-9278-1a2f0af3a9a9.c000.snappy.parquet
2020-12-11 12:06:19,361 [main] INFO s3a.S3AFileSystem
(S3Guard.java:logS3GuardDisabled(1135)) - S3Guard is disabled on this bucket:
stevel-london
2020-12-11 12:06:19,366 [main] INFO impl.DirectoryPolicyImpl
(DirectoryPolicyImpl.java:getDirectoryPolicy(189)) - Directory markers will be
kept
# file:
s3a://stevel-london/cloud-integration/DELAY_LISTING_ME/S3ACommitBulkDataSuite/bulkdata/output/landsat/parquet/parted-1/year=2016/month=10/part-00000-8b00c5f2-cd1f-4741-9278-1a2f0af3a9a9.c000.snappy.parquet
header.Content-Disposition
header.Content-Encoding
header.Content-Language
header.Content-Length="92337"
header.Content-MD5
header.Content-Range
header.Content-Type="application/octet-stream"
header.ETag="b445e3e08b71650e906789a0f5a80c7b-1"
header.Last-Modified="Thu Dec 10 15:10:12 GMT 2020"
```
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Issue Time Tracking
-------------------
Worklog Id: (was: 523166)
Time Spent: 2h (was: 1h 50m)
> Magic committer files don't have the count of bytes written collected by spark
> ------------------------------------------------------------------------------
>
> Key: HADOOP-17414
> URL: https://issues.apache.org/jira/browse/HADOOP-17414
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.2.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h
> Remaining Estimate: 0h
>
> The spark statistics tracking doesn't correctly assess the size of the
> uploaded files as it only calls getFileStatus on the zero byte objects -not
> the yet-to-manifest files. Which, given they don't exist yet, isn't easy to
> do.
> Solution:
> * Add getXAttr and listXAttr API calls to S3AFileSystem
> * Return all S3 object headers as XAttr attributes prefixed "header." That's
> custom and standard (e.g header.Content-Length).
> The setXAttr call isn't implemented, so for correctness the FS doesn't
> declare its support for the API in hasPathCapability().
> The magic commit file write sets the custom header
> set the length of the data final data in the header
> x-hadoop-s3a-magic-data-length in the marker file.
> A matching patch in Spark will look for the XAttr
> "header.x-hadoop-s3a-magic-data-length" when the file
> being probed for output data is zero byte long.
> As a result, the job tracking statistics will report the
> bytes written but yet to be manifest.
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