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https://issues.apache.org/jira/browse/HADOOP-18517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17627982#comment-17627982
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ASF GitHub Bot commented on HADOOP-18517:
-----------------------------------------
steveloughran commented on PR #5103:
URL: https://github.com/apache/hadoop/pull/5103#issuecomment-1301252535
i'm getting test timeouts on big uploads tonight.
```
[ERROR] Errors:
[ERROR] ITestAzureBlobFileSystemE2E.testOOBWritesAndReadFail:95 »
TestTimedOut test ti...
[ERROR]
ITestAzureBlobFileSystemFlush.testWriteHeavyBytesToFileSyncFlush:160 »
TestTimedOut
[ERROR]
ITestAbfsInputStream.testWithNoOptimization:58->createFileWithContent:179 »
TestTimedOut
[ERROR]
ITestAbfsInputStreamReadFooter>ITestAbfsInputStream.testExceptionInOptimization:103->ITestAbfsInputStream.createFileWithContent:179
» TestTimedOut
[ERROR]
ITestAbfsInputStreamReadFooter.testSeekToBeginAndReadWithConfTrue:106->testSeekAndReadWithConf:163->seekReadAndTest:196
» TestTimedOut
[ERROR]
ITestAbfsInputStreamReadFooter.testSeekToEndAndReadWithConfTrue:146->testSeekAndReadWithConf:162->ITestAbfsInputStream.createFileWithContent:179
» TestTimedOut
[ERROR]
ITestAbfsInputStreamReadFooter>ITestAbfsInputStream.testWithNoOptimization:58->ITestAbfsInputStream.createFileWithContent:179
» TestTimedOut
[ERROR]
ITestAbfsInputStreamSmallFileReads>ITestAbfsInputStream.testExceptionInOptimization:103->ITestAbfsInputStream.createFileWithContent:179
» TestTimedOut
[ERROR]
ITestAbfsInputStreamSmallFileReads.testSeekToMiddleAndReadBigFileWithConfFalse:156->testSeekAndReadWithConf:166->ITestAbfsInputStream.createFileWithContent:179
» TestTimedOut
[INFO]
```
earlier today i was uploading multiGB files to the same a/c, which was
triggering throttling (laptop was plugged in to firewall). its now on wifi, so
either its that or some throttling is still taking place
> ABFS: Add fs.azure.enable.readahead option to disable readahead
> ---------------------------------------------------------------
>
> Key: HADOOP-18517
> URL: https://issues.apache.org/jira/browse/HADOOP-18517
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/azure
> Affects Versions: 3.3.4
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
>
> Add an option fs.azure.enable.readahead to allow the abfs readahead to be
> disabled.
> This has been shipping in cloudera releases, because workloads with heavy
> random IO don't always benefit from prefetching.
> Pulling this in to ASF hadoop allows for
> * everyone to experiment with/without prefetching
> * ability to disable prefetching if you have problems with it
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