Sihua Zhou created FLINK-8676:
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Summary: Memory Leak in AbstractKeyedStateBackend.applyToAllKeys()
when backend is base on RocksDB
Key: FLINK-8676
URL: https://issues.apache.org/jira/browse/FLINK-8676
Project: Flink
Issue Type: Bug
Reporter: Sihua Zhou
Assignee: Sihua Zhou
`AbstractKeyedStateBackend.applyToAllKeys() ` uses backend's getKeys(stateName,
namespace) to get all keys that belong to `namespace`. But, in
`RocksDBKeyedStateBackend.getKeys()` if just return a object which wrap a
`rocksdb iterator`, that is dangous, because rocksdb will ping the resources
that belong to the iterator into memory untill iterator.close() is invoked, but
it didn't invoked right now. This will lead to memory leak finally.
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