Vladislav Pyatkov created IGNITE-14821:
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Summary: AssertionError: Historical iterator tries to iterate WAL
out of reservation
Key: IGNITE-14821
URL: https://issues.apache.org/jira/browse/IGNITE-14821
Project: Ignite
Issue Type: Improvement
Reporter: Vladislav Pyatkov
A reason of the issue is incorrect comparison WAL pointer, that leads to choose
not quite the last pointer for reservation before rebalance. The old code
selected the earliest WAL segment, but not the last pointer in it.
Assuming assertion error in description:
Historical iterator tries to iterate WAL out of reservation
[cache=SYSTEM_CACHEGROUP_LONGKEYS, reservedPointer=FileWALPointer [idx=10,
fileOff=448674503, len=104925], historicalPointer=FileWALPointer [idx=10,
fileOff=442844723, len=104925]]
reservedPointer is chosen incorrect, but corresponds to the valid segment
{{idx=10}} (the same as in historicalPointer).
A valid comparison of WAL pointers solved this issue. Segment number and
segment offset participate in it together (look at the FileWalPointer#comapreTo
method).
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