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CURATOR-715. bottom up existence check for mkdirs #506

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pfcoperez
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@pfcoperez pfcoperez commented Aug 31, 2024

This PR tackles the problem reported in https://issues.apache.org/jira/browse/CURATOR-715.

Namely, that for ZooKeeper trees where upper nodes have restricted READ ACLs, it is not possible to use creatingParentsIfNeeded without changing the ACLs.

This is because the implementation prior to this patch iterated from root node to the newly created one, checking existence of all intermediate nodes.

This patch changes that approach from top-down to bottom-up and the first ancestor that exists is where the validation stops thus avoiding exists checks on the higher nodes with more restricted access.

This is only relevant since https://issues.apache.org/jira/browse/ZOOKEEPER-2590

@madhava-sridhar
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I would vote up the fix , this is real blocker to anybody upgrading zookeeper to version with fix for ZOOKEEPER-2590

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@eolivelli eolivelli left a comment

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+1

@apache/curator-committers can you please take a look ?

@eolivelli
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Hopefully we can include this in the next release, looking for a second reviewer
thanks

@pfcoperez
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Hopefully we can include this in the next release, looking for a second reviewer thanks

Thank you @eolivelli! I've just pushed code style fix after executing mvn spotless:apply with d886a8a .

@kezhuw kezhuw merged commit 9fe79d8 into apache:master Sep 12, 2024
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kezhuw commented Sep 12, 2024

@pfcoperez Merged. Thank you for your contribution!

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@tisonkun tisonkun left a comment

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Thanks for your contribution!

Looks reasonable.

@tisonkun tisonkun changed the title CURATOR-715/mkdirs/bottom up existence check CURATOR-715. bottom up existence check for mkdirs Sep 12, 2024
@pfcoperez
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Thank you @eolivelli @kezhuw and @tisonkun for your reviews 🙇

Do you have any plans of releasing before the end of the year?

@eolivelli
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Please ask on dev@curator.apache.org
We can cut a release

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5 participants