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https://issues.apache.org/jira/browse/RATIS-2134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chung En Lee updated RATIS-2134:
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Description:
Now, RaftLog appends a metadata entry with the lastCommitIndex and checks
whether the entry at the lastCommitIndex is neither a metadata entry nor an
entry with a smaller commit index.
However, RaftLog doesn't always log metadata entries in order. Sometimes, it
misses some commit indexes. For example:
STATEMACHINELOGENTRY(1, 1)
STATEMACHINELOGENTRY(1, 2)
METADATAENTRY(commitIndex: 1)
A {{METADATAENTRY is lost.}}
{{The lastCommitIndex in the METADATAENTRY}} and is a metadata entry, RaftLog
won't append it.
was:
Now, RaftLog appends a metadata entry with the lastCommitIndex and checks
whether the entry at the lastCommitIndex is neither a metadata entry nor an
entry with a smaller commit index.
However, RaftLog doesn't always log metadata entries in order. Sometimes, it
misses some commit indexes. For example:
STATEMACHINELOGENTRY(1, 1)
STATEMACHINELOGENTRY(1, 2)
METADATAENTRY(commitIndex: 1)
If a {{METADATAENTRY}} is missed and the lastCommitIndex is a metadata entry,
RaftLog won't append it.
> `logMetadata` could miss appending the `metadataEntry` with the
> lastCommitIndex
> -------------------------------------------------------------------------------
>
> Key: RATIS-2134
> URL: https://issues.apache.org/jira/browse/RATIS-2134
> Project: Ratis
> Issue Type: Bug
> Reporter: Chung En Lee
> Assignee: Chung En Lee
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Now, RaftLog appends a metadata entry with the lastCommitIndex and checks
> whether the entry at the lastCommitIndex is neither a metadata entry nor an
> entry with a smaller commit index.
> However, RaftLog doesn't always log metadata entries in order. Sometimes, it
> misses some commit indexes. For example:
> STATEMACHINELOGENTRY(1, 1)
> STATEMACHINELOGENTRY(1, 2)
> METADATAENTRY(commitIndex: 1)
> A {{METADATAENTRY is lost.}}
> {{The lastCommitIndex in the METADATAENTRY}} and is a metadata entry,
> RaftLog won't append it.
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