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Posted to dev@directory.apache.org by "Emmanuel Lécharny (Jira)" <ji...@apache.org> on 2025/04/17 21:43:00 UTC
[jira] [Updated] (DIRSERVER-2418) Potential Synchronization Issue At AbstractBTreePartition
[ https://issues.apache.org/jira/browse/DIRSERVER-2418?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Emmanuel Lécharny updated DIRSERVER-2418:
-----------------------------------------
Fix Version/s: 2.0.0.AM28
> Potential Synchronization Issue At AbstractBTreePartition
> ----------------------------------------------------------
>
> Key: DIRSERVER-2418
> URL: https://issues.apache.org/jira/browse/DIRSERVER-2418
> Project: Directory ApacheDS
> Issue Type: Bug
> Affects Versions: 2.0.0.AM27
> Reporter: Mikhail Titov
> Priority: Major
> Fix For: 2.0.0.AM28
>
>
> Let's take a look at the [getSuffixId|https://github.com/apache/directory-server/blob/38e7e2bdb685f71c8f7726197bfbd22cce33ba3a/xdbm-partition/src/main/java/org/apache/directory/server/core/partition/impl/btree/AbstractBTreePartition.java#L2995] method:
> Field *suffixId* has been compared without locking at [link|https://github.com/apache/directory-server/blob/38e7e2bdb685f71c8f7726197bfbd22cce33ba3a/xdbm-partition/src/main/java/org/apache/directory/server/core/partition/impl/btree/AbstractBTreePartition.java#L2997] and is assigned under lock at [link|https://github.com/apache/directory-server/blob/38e7e2bdb685f71c8f7726197bfbd22cce33ba3a/xdbm-partition/src/main/java/org/apache/directory/server/core/partition/impl/btree/AbstractBTreePartition.java#L3004].
> This potentially may lead to a synchronization error, when many processes simultaneously pass the check and then reach the lock one by one.
> The problem and possible resolve are described in more detail [here|https://stackoverflow.com/questions/13261300/is-it-okay-to-double-check-before-and-inside-a-lock-before-running-the-code-in#:~:text=The%20first%20method,a%20performance%20issue.]
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