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https://issues.apache.org/jira/browse/HDDS-3118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Attila Doroszlai updated HDDS-3118:
-----------------------------------
Attachment: repro.patch
repro.log
> Possible deadlock in LockManager
> --------------------------------
>
> Key: HDDS-3118
> URL: https://issues.apache.org/jira/browse/HDDS-3118
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: Attila Doroszlai
> Priority: Major
> Attachments: repro.log, repro.patch
>
>
> {{LockManager}} has a possible deadlock.
> # Number of locks is limited by using a {{GenericObjectPool}}. If N locks
> are already acquired, new requestors need to wait. This wait in
> {{getLockForLocking}} happens in a callback executed from
> {{ConcurrentHashMap#compute}} while holding a lock on a map entry.
> # While releasing a lock, {{decrementActiveLockCount}} implicitly requires a
> lock on an entry in {{ConcurrentHashMap}}.
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