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https://issues.apache.org/jira/browse/HDDS-12986?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ethan Rose reassigned HDDS-12986:
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Assignee: Aswin Shakil
> Race condition between BCSID update and container repair
> --------------------------------------------------------
>
> Key: HDDS-12986
> URL: https://issues.apache.org/jira/browse/HDDS-12986
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Ethan Rose
> Assignee: Aswin Shakil
> Priority: Major
>
> Right now we don't have an atomic view of the chunks the tree says are
> missing vs the BCSID we should update to if we pull those chunks. Here's an
> example:
> Replicas r1 and r2 are missing chunk c1 and have bcsid 99. r3 has all chunks
> and bcsid 100
> - r1 starts reconciling with r3
> - r1 writes c1 to container
> - r1 does putblock with bcsid 100
> - r2 starts reconciling with r1
> - r2 pulls tree from r1, which does not yet have c1
> - r2 pulls bcsid from r1, which is 100
> - r1 updates tree with c1
> - r2 pulls chunks based on the tree it already pulled, so it does not get
> c1
> - r2 updates bcsid to 100 because it had no failed chunk pulls, but it
> does not have c1 corresponding to bcsid 100.
> The easiest fix for this is to put BCSID in the block merkle tree proto (but
> not the hash). This also removes the need for getBlock calls during
> reconciliation.
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