[jira] [Updated] (FLINK-28942) Deadlock may occurs when releasing readers for SortMergeResultPartition

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-28942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated FLINK-28942:
-----------------------------------
    Labels: pull-request-available  (was: )

> Deadlock may occurs when releasing readers for SortMergeResultPartition
> -----------------------------------------------------------------------
>
>                 Key: FLINK-28942
>                 URL: https://issues.apache.org/jira/browse/FLINK-28942
>             Project: Flink
>          Issue Type: Bug
>    Affects Versions: 1.16.0
>            Reporter: Yuxin Tan
>            Priority: Major
>              Labels: pull-request-available
>
> After adding the logic of recycling buffers in CompositeBuffer in https://issues.apache.org/jira/browse/FLINK-28373, when reading data and recycling buffers simultaneously, the deadlock between the lock of SortMergeResultPartition and the lock of SingleInputGate may occur.
> In short, the deadlock may occur as follows.
> 1. SingleInputGate.getNextBufferOrEvent (SingleInputGate lock)
> CompositeBuffer.getFullBufferData -> CompositeBuffer.recycleBuffer -> waiting for 
> SortMergeResultPartition lock;
> 2. ResultPartitionManager.releasePartition (SortMergeResultPartition lock) -> 
> SortMergeSubpartitionReader.notifyDataAvailable -> 
> SingleInputGate.notifyChannelNonEmpty -> waiting for SingleInputGate lock.
> The possibility of this deadlock is very small, but we should fix the bug as soon as possible.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)