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Add single drive support for directory prefixes in Listing (#13829) 

This fixes the compatibility issue with Hadoop 3.3.1

fixes #13710
This commit is contained in:
Harshavardhana 2021-12-03 18:08:40 -08:00 committed by GitHub
parent f0fc77fded
commit f6190d6751
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1 changed files with 22 additions and 0 deletions
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22
cmd/object-api-common.go
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@ -247,6 +247,21 @@ func listObjects(ctx context.Context, obj ObjectLayer, bucket, prefix, marker, d
return loi, nil
}
if len(prefix) > 0 && maxKeys == 1 && delimiter == "" && marker == "" {
// Optimization for certain applications like
// - Cohesity
// - Actifio, Splunk etc.
// which send ListObjects requests where the actual object
// itself is the prefix and max-keys=1 in such scenarios
// we can simply verify locally if such an object exists
// to avoid the need for ListObjects().
objInfo, err := obj.GetObjectInfo(ctx, bucket, prefix, ObjectOptions{NoLock: true})
if err == nil {
loi.Objects = append(loi.Objects, objInfo)
return loi, nil
}
}
// For delimiter and prefix as '/' we do not list anything at all
// since according to s3 spec we stop at the 'delimiter'
// along // with the prefix. On a flat namespace with 'prefix'
@ -290,6 +305,13 @@ func listObjects(ctx context.Context, obj ObjectLayer, bucket, prefix, marker, d
i := i
walkResult, ok := <-walkResultCh
if !ok {
if HasSuffix(prefix, SlashSeparator) {
objInfo, err := obj.GetObjectInfo(ctx, bucket, prefix, ObjectOptions{NoLock: true})
if err == nil {
loi.Objects = append(loi.Objects, objInfo)
return loi, nil
}
}
// Closed channel.
eof = true
break