[jira] [Commented] (HADOOP-16378) RawLocalFileStatus throws exception if a file is created and deleted quickly
[
https://issues.apache.org/jira/browse/HADOOP-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16886671#comment-16886671
]
K S commented on HADOOP-16378:
--
Hey [~ste...@apache.org]. Sorry but I have unfortunately not been able to
reproduce. I'm not sure if I can even post a stack trace, as it is part of my
company's IP. I have already posted the reproduction steps in the description
of this bug. Hope that helps.
> RawLocalFileStatus throws exception if a file is created and deleted quickly
>
>
> Key: HADOOP-16378
> URL: https://issues.apache.org/jira/browse/HADOOP-16378
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
>Affects Versions: 3.3.0
> Environment: Ubuntu 18.04, Hadoop 2.7.3 (Though this problem exists
> on later versions of Hadoop as well), Java 8 ( + Java 11).
>Reporter: K S
>Priority: Critical
>
> Bug occurs when NFS creates temporary ".nfs*" files as part of file moves and
> accesses. If this file is deleted very quickly after being created, a
> RuntimeException is thrown. The root cause is in the loadPermissionInfo
> method in org.apache.hadoop.fs.RawLocalFileSystem. To get the permission
> info, it first does
>
> {code:java}
> ls -ld{code}
> and then attempts to get permissions info about each file. If a file
> disappears between these two steps, an exception is thrown.
> *Reproduction Steps:*
> An isolated way to reproduce the bug is to run FileInputFormat.listStatus
> over and over on the same dir that we’re creating those temp files in. On
> Ubuntu or any other Linux-based system, this should fail intermittently
> *Fix:*
> One way in which we managed to fix this was to ignore the exception being
> thrown in loadPemissionInfo() if the exit code is 1 or 2. Alternatively, it's
> possible that turning "useDeprecatedFileStatus" off in RawLocalFileSystem
> would fix this issue, though we never tested this, and the flag was
> implemented to fix -HADOOP-9652-. Could also fix in conjunction with
> HADOOP-8772.
>
>
>
>
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[jira] [Commented] (HADOOP-16378) RawLocalFileStatus throws exception if a file is created and deleted quickly
[
https://issues.apache.org/jira/browse/HADOOP-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16875103#comment-16875103
]
K S commented on HADOOP-16378:
--
Sorry forgot to try and reproduce it. I will do it over the weekend
> RawLocalFileStatus throws exception if a file is created and deleted quickly
>
>
> Key: HADOOP-16378
> URL: https://issues.apache.org/jira/browse/HADOOP-16378
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
>Affects Versions: 3.3.0
> Environment: Ubuntu 18.04, Hadoop 2.7.3 (Though this problem exists
> on later versions of Hadoop as well), Java 8 ( + Java 11).
>Reporter: K S
>Priority: Critical
>
> Bug occurs when NFS creates temporary ".nfs*" files as part of file moves and
> accesses. If this file is deleted very quickly after being created, a
> RuntimeException is thrown. The root cause is in the loadPermissionInfo
> method in org.apache.hadoop.fs.RawLocalFileSystem. To get the permission
> info, it first does
>
> {code:java}
> ls -ld{code}
> and then attempts to get permissions info about each file. If a file
> disappears between these two steps, an exception is thrown.
> *Reproduction Steps:*
> An isolated way to reproduce the bug is to run FileInputFormat.listStatus
> over and over on the same dir that we’re creating those temp files in. On
> Ubuntu or any other Linux-based system, this should fail intermittently
> *Fix:*
> One way in which we managed to fix this was to ignore the exception being
> thrown in loadPemissionInfo() if the exit code is 1 or 2. Alternatively, it's
> possible that turning "useDeprecatedFileStatus" off in RawLocalFileSystem
> would fix this issue, though we never tested this, and the flag was
> implemented to fix -HADOOP-9652-. Could also fix in conjunction with
> HADOOP-8772.
>
>
>
>
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[jira] [Commented] (HADOOP-16378) RawLocalFileStatus throws exception if a file is created and deleted quickly
[
https://issues.apache.org/jira/browse/HADOOP-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16871768#comment-16871768
]
K S commented on HADOOP-16378:
--
Eh, it'll be a little difficult to reproduce. We discovered the error by
mistake when running company software, and managed to reproduce it by running a
set of programs and running a bash script to quickly generate and delete files
that start with "." I will try to reproduce it tomorrow evening
> RawLocalFileStatus throws exception if a file is created and deleted quickly
>
>
> Key: HADOOP-16378
> URL: https://issues.apache.org/jira/browse/HADOOP-16378
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
>Affects Versions: 3.3.0
> Environment: Ubuntu 18.04, Hadoop 2.7.3 (Though this problem exists
> on later versions of Hadoop as well), Java 8 ( + Java 11).
>Reporter: K S
>Priority: Critical
>
> Bug occurs when NFS creates temporary ".nfs*" files as part of file moves and
> accesses. If this file is deleted very quickly after being created, a
> RuntimeException is thrown. The root cause is in the loadPermissionInfo
> method in org.apache.hadoop.fs.RawLocalFileSystem. To get the permission
> info, it first does
>
> {code:java}
> ls -ld{code}
> and then attempts to get permissions info about each file. If a file
> disappears between these two steps, an exception is thrown.
> *Reproduction Steps:*
> An isolated way to reproduce the bug is to run FileInputFormat.listStatus
> over and over on the same dir that we’re creating those temp files in. On
> Ubuntu or any other Linux-based system, this should fail intermittently
> *Fix:*
> One way in which we managed to fix this was to ignore the exception being
> thrown in loadPemissionInfo() if the exit code is 1 or 2. Alternatively, it's
> possible that turning "useDeprecatedFileStatus" off in RawLocalFileSystem
> would fix this issue, though we never tested this, and the flag was
> implemented to fix -HADOOP-9652-. Could also fix in conjunction with
> HADOOP-8772.
>
>
>
>
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[jira] [Commented] (HADOOP-16378) RawLocalFileStatus throws exception if a file is created and deleted quickly
[
https://issues.apache.org/jira/browse/HADOOP-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16871248#comment-16871248
]
Steve Loughran commented on HADOOP-16378:
-
lets not worry about that. The main thing is not to suffer here.
what's the full stack trace?
> RawLocalFileStatus throws exception if a file is created and deleted quickly
>
>
> Key: HADOOP-16378
> URL: https://issues.apache.org/jira/browse/HADOOP-16378
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
>Affects Versions: 3.3.0
> Environment: Ubuntu 18.04, Hadoop 2.7.3 (Though this problem exists
> on later versions of Hadoop as well), Java 8 ( + Java 11).
>Reporter: K S
>Priority: Critical
>
> Bug occurs when NFS creates temporary ".nfs*" files as part of file moves and
> accesses. If this file is deleted very quickly after being created, a
> RuntimeException is thrown. The root cause is in the loadPermissionInfo
> method in org.apache.hadoop.fs.RawLocalFileSystem. To get the permission
> info, it first does
>
> {code:java}
> ls -ld{code}
> and then attempts to get permissions info about each file. If a file
> disappears between these two steps, an exception is thrown.
> *Reproduction Steps:*
> An isolated way to reproduce the bug is to run FileInputFormat.listStatus
> over and over on the same dir that we’re creating those temp files in. On
> Ubuntu or any other Linux-based system, this should fail intermittently
> *Fix:*
> One way in which we managed to fix this was to ignore the exception being
> thrown in loadPemissionInfo() if the exit code is 1 or 2. Alternatively, it's
> possible that turning "useDeprecatedFileStatus" off in RawLocalFileSystem
> would fix this issue, though we never tested this, and the flag was
> implemented to fix -HADOOP-9652-. Could also fix in conjunction with
> HADOOP-8772.
>
>
>
>
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[jira] [Commented] (HADOOP-16378) RawLocalFileStatus throws exception if a file is created and deleted quickly
[
https://issues.apache.org/jira/browse/HADOOP-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16868812#comment-16868812
]
K S commented on HADOOP-16378:
--
[~ste...@apache.org] I don't see that happening. The loadPermissionInfo method
only uses the shell, unless you're looking somewhere else. Moving off of shell
entirely would be a good idea, though im not familiar enough with this codebase
to give any sort of advice. It would be good to have other developers weigh in
here
> RawLocalFileStatus throws exception if a file is created and deleted quickly
>
>
> Key: HADOOP-16378
> URL: https://issues.apache.org/jira/browse/HADOOP-16378
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
>Affects Versions: 3.3.0
> Environment: Ubuntu 18.04, Hadoop 2.7.3 (Though this problem exists
> on later versions of Hadoop as well), Java 8 ( + Java 11).
>Reporter: K S
>Priority: Critical
>
> Bug occurs when NFS creates temporary ".nfs*" files as part of file moves and
> accesses. If this file is deleted very quickly after being created, a
> RuntimeException is thrown. The root cause is in the loadPermissionInfo
> method in org.apache.hadoop.fs.RawLocalFileSystem. To get the permission
> info, it first does
>
> {code:java}
> ls -ld{code}
> and then attempts to get permissions info about each file. If a file
> disappears between these two steps, an exception is thrown.
> *Reproduction Steps:*
> An isolated way to reproduce the bug is to run FileInputFormat.listStatus
> over and over on the same dir that we’re creating those temp files in. On
> Ubuntu or any other Linux-based system, this should fail intermittently
> *Fix:*
> One way in which we managed to fix this was to ignore the exception being
> thrown in loadPemissionInfo() if the exit code is 1 or 2. Alternatively, it's
> possible that turning "useDeprecatedFileStatus" off in RawLocalFileSystem
> would fix this issue, though we never tested this, and the flag was
> implemented to fix -HADOOP-9652-. Could also fix in conjunction with
> HADOOP-8772.
>
>
>
>
--
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[jira] [Commented] (HADOOP-16378) RawLocalFileStatus throws exception if a file is created and deleted quickly
[
https://issues.apache.org/jira/browse/HADOOP-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=1689#comment-1689
]
Steve Loughran commented on HADOOP-16378:
-
I'd prefer moving off shell entirely and into the fs APIs, either java or
hadoop native. Doesn't it already drop to some native lib if its available?
> RawLocalFileStatus throws exception if a file is created and deleted quickly
>
>
> Key: HADOOP-16378
> URL: https://issues.apache.org/jira/browse/HADOOP-16378
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
>Affects Versions: 3.3.0
> Environment: Ubuntu 18.04, Hadoop 2.7.3 (Though this problem exists
> on later versions of Hadoop as well), Java 8 ( + Java 11).
>Reporter: K S
>Priority: Critical
>
> Bug occurs when NFS creates temporary ".nfs*" files as part of file moves and
> accesses. If this file is deleted very quickly after being created, a
> RuntimeException is thrown. The root cause is in the loadPermissionInfo
> method in org.apache.hadoop.fs.RawLocalFileSystem. To get the permission
> info, it first does
>
> {code:java}
> ls -ld{code}
> and then attempts to get permissions info about each file. If a file
> disappears between these two steps, an exception is thrown.
> *Reproduction Steps:*
> An isolated way to reproduce the bug is to run FileInputFormat.listStatus
> over and over on the same dir that we’re creating those temp files in. On
> Ubuntu or any other Linux-based system, this should fail intermittently
> *Fix:*
> One way in which we managed to fix this was to ignore the exception being
> thrown in loadPemissionInfo() if the exit code is 1 or 2. Alternatively, it's
> possible that turning "useDeprecatedFileStatus" off in RawLocalFileSystem
> would fix this issue, though we never tested this, and the flag was
> implemented to fix -HADOOP-9652-. Could also fix in conjunction with
> HADOOP-8772.
>
>
>
>
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