Matthias Boehm closed SYSTEMML-2234.
       Resolution: Fixed
         Assignee: Matthias Boehm
    Fix Version/s: SystemML 1.2

> Memory leak buffer pool due to missing variable cleanup
> -------------------------------------------------------
>                 Key: SYSTEMML-2234
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2234
>             Project: SystemML
>          Issue Type: Task
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>            Priority: Blocker
>             Fix For: SystemML 1.2
> There are scenarios where variables are not properly cleaned up before 
> assigning new matrices to logical variable names. This missing cleanup leads 
> to a memory leak in the buffer pool, which in turn leads to unnecessary 
> evictions and missing cleanup of FS and HDFS files.
> After a closer investigation, this issue occurs for special cases of function 
> calls that have a peculiar control flow structure that prevents rmvar 
> instructions for certain intermediates and thus requires cleanup of these 
> intermediates after the function call. Furthermore, a similar issue occurs 
> for loops with dedicated update-in place variables. 

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