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https://issues.apache.org/jira/browse/CASSANDRA-20726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benedict Elliott Smith reassigned CASSANDRA-20726:
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Assignee: Benedict Elliott Smith
> Accord: Fast Coordination Optimisations and Miscellaneous Fixes
> ---------------------------------------------------------------
>
> Key: CASSANDRA-20726
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20726
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Accord
> Reporter: Benedict Elliott Smith
> Assignee: Benedict Elliott Smith
> Priority: Normal
>
> Improve:
> - Introduce SequentialAgentExecutor
> - ExecuteEphemeralRead.LocalExecute (matching ExecuteTxn.LocalExecute)
> - remove AgentExecutor (agent() only used as implementation detail)
> - Skip CommandStore/CommandsForKey on read or apply, when safe to do so
> - Implement maybeExecuteImmediately
> Fix:
> - Marking vestigial without knowing all covering keys
> - Incorrect size in WaitingOn.none
> - Cleanup RX that are not known but are no longer needed, due to being
> defunct
> - Home should not abort because of local truncation; may still be
> incomplete on another shard
> - Invalidate infinite loop due to interpreting Vestigial as a possible
> decision (as though it were another Truncated state)
> - Known.isTruncated reporting incorrect answer in some cases, leading to
> infinite RecoverWithRoute loops as not slicing to correct subset and some
> shards are truncated and reject the deps collection
> - BurnTest slowCoordinatorDelay should grow with retryCount
> - NotAccept should check both ballot and saveStatus; PreCommitted or
> later can be propagated by Apply that has an earlier ballot
> - Handle awaiting locally retired epoch
> - Fix propagate low epoch of sync points
> - Fix GetEphemeralReadDeps.reduce NPE
> - Don't use tombstones to ERASE journal entries, as want to produce an
> Erased SaveStatus until EXPUNGE
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