Make FsBlobContainer Listing Resilient to Concurrent Modifications #49142
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If we list out files in a folder via the lazily computed directory stream, we have to deal with concurrent deletes when reading the file attributes since we don't have a lock on the directory in any way. Closes elastic#37581
original-brownbear
added
>bug
:Distributed Coordination/Snapshot/Restore
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Pinging @elastic/es-distributed (:Distributed/Snapshot/Restore) |
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Jenkins run elasticsearch-ci/1 |
ywelsch
suggested changes
Nov 15, 2019
| final BasicFileAttributes attrs; | ||
| try { | ||
| attrs = Files.readAttributes(file, BasicFileAttributes.class); | ||
| } catch (FileNotFoundException e) { |
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This might need to be NoSuchFileException | FileNotFoundException.
| try { | ||
| attrs = Files.readAttributes(file, BasicFileAttributes.class); | ||
| } catch (FileNotFoundException e) { | ||
| continue; |
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can you add a comment here saying why it's ok to ignore?
| attrs = Files.readAttributes(file, BasicFileAttributes.class); | ||
| } catch (FileNotFoundException e) { | ||
| continue; | ||
| } | ||
| if (attrs.isRegularFile()) { |
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perhaps easier as the two suggestions above is to use Files.isRegularFile(file) here which takes care of all this.
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This won't help us I think? We still want the file size two lines below where we'd have to make another call to the FS that we'd have to guard against "file not found".
| attrs = Files.readAttributes(file, BasicFileAttributes.class); | ||
| } catch (FileNotFoundException e) { | ||
| continue; | ||
| } | ||
| if (attrs.isRegularFile()) { |
There was a problem hiding this comment.
This won't help us I think? We still want the file size two lines below where we'd have to make another call to the FS that we'd have to guard against "file not found".
| try { | ||
| attrs = Files.readAttributes(file, BasicFileAttributes.class); | ||
| } catch (FileNotFoundException e) { | ||
| continue; |
| final BasicFileAttributes attrs; | ||
| try { | ||
| attrs = Files.readAttributes(file, BasicFileAttributes.class); | ||
| } catch (FileNotFoundException e) { |
|
Thanks Yannick! |
original-brownbear
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to original-brownbear/elasticsearch
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Nov 15, 2019
…lastic#49142) * Make FsBlobContainer Listing Resilient to Concurrent Modifications If we list out files in a folder via the lazily computed directory stream, we have to deal with concurrent deletes when reading the file attributes since we don't have a lock on the directory in any way. Closes elastic#37581
original-brownbear
added a commit
to original-brownbear/elasticsearch
that referenced
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Nov 15, 2019
…lastic#49142) * Make FsBlobContainer Listing Resilient to Concurrent Modifications If we list out files in a folder via the lazily computed directory stream, we have to deal with concurrent deletes when reading the file attributes since we don't have a lock on the directory in any way. Closes elastic#37581
original-brownbear
added a commit
that referenced
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Nov 15, 2019
…49142) (#49176) * Make FsBlobContainer Listing Resilient to Concurrent Modifications If we list out files in a folder via the lazily computed directory stream, we have to deal with concurrent deletes when reading the file attributes since we don't have a lock on the directory in any way. Closes #37581
original-brownbear
added a commit
that referenced
this pull request
Nov 15, 2019
…49142) (#49177) * Make FsBlobContainer Listing Resilient to Concurrent Modifications If we list out files in a folder via the lazily computed directory stream, we have to deal with concurrent deletes when reading the file attributes since we don't have a lock on the directory in any way. Closes #37581
This was referenced Feb 3, 2020
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If we list out files in a folder via the lazily computed directory
stream, we have to deal with concurrent deletes when reading the file
attributes since we don't have a lock on the directory in any way.
Closes #37581