[jira] [Created] (FLINK-10267) [State] Fix arbitrary iterator access on RocksDBMapIterator
Yun Tang created FLINK-10267:
Summary: [State] Fix arbitrary iterator access on RocksDBMapIterator
Issue Type: Bug
Components: State Backends, Checkpointing
Affects Versions: 1.6.0, 1.5.3
Reporter: Yun Tang
Assignee: Yun Tang
Fix For: 1.6.1, 1.5.4
Currently, RocksDBMapIterator would load 128 entries into local cacheEntries. Both RocksDBMapIterator#next() and RocksDBMapIterator#hasNext() action would trigger to load RocksDBEntry into cacheEntries.
However, if the iterator's size larger than 128 and we continue to access the iterator with following order: hasNext() -> next() -> hasNext() -> remove(), we would meet weird exception when we try to remove the 128th element:
java.lang.IllegalStateException: The remove operation must be called after a valid next operation.
Since we could not control user's access on iterator, we should fix this bug to avoid unexpected exception.
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