Matthias Boehm created SYSTEMML-2234:
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Summary: 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
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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