Yingjie Cao created FLINK-21778:
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Summary: Use heap memory instead of direct memory as index entry
cache for sort-merge shuffle
Key: FLINK-21778
URL: https://issues.apache.org/jira/browse/FLINK-21778
Project: Flink
Issue Type: Sub-task
Components: Runtime / Network
Affects Versions: 1.12.0
Reporter: Yingjie Cao
Fix For: 1.13.0
Currently, the sort-merge shuffle implementation uses a piece of direct memory
as index entry cache for acceleration. We can use heap memory instead to reduce
the usage of direct memory which further reduces the possibility of
OutOfMemoryError.
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