Haibo Suen created FLINK-11379:
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Summary: "java.lang.OutOfMemoryError: Direct buffer memory" when
TM loads a large size TDD
Key: FLINK-11379
URL: https://issues.apache.org/jira/browse/FLINK-11379
Project: Flink
Issue Type: Bug
Components: TaskManager
Affects Versions: 1.7.1, 1.7.0
Reporter: Haibo Suen
Assignee: Haibo Suen
When TM loads a offloaded TDD with large size, it may throw a
"java.lang.OutOfMemoryError: Direct Buffer Memory" error. The loading uses
nio's _Files.readAllBytes()_ to read serialized TDD. In the call stack of
_Files.readAllBytes()_ , it will allocate a direct memory buffer which's size
is equal the length of the file. This will cause OutOfMemoryErro error when
direct memory is not enough.
A fixed size direct buffer should be used to read a file to avoid
OutOfMemoryErro error, such as a 8K buffer.
The exception stack is as follows (this exception stack is from an old Flink
version, but the master branch has the same problem).
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