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https://issues.apache.org/jira/browse/HBASE-5782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-5782:
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Attachment: 5782-lars-v2.txt
In the interest of keeping this simple, here's another simple patch.
This patch assumes that:
# It is only the appends that need to happen in order.
# The sync is the time consuming operation.
So a special lock is only held for enforce the ordering of the appends (appends
are single threaded) and syncs can happen in parallel without this lock held.
This should give us the maximum concurrency possible, while keeping the change
small and palletable for 0.94.
Please let me know whether I am smoking something.
> Edits can be appended out of seqid order since HBASE-4487
> ---------------------------------------------------------
>
> Key: HBASE-5782
> URL: https://issues.apache.org/jira/browse/HBASE-5782
> Project: HBase
> Issue Type: Bug
> Components: wal
> Affects Versions: 0.94.0
> Reporter: Gopinathan A
> Assignee: ramkrishna.s.vasudevan
> Priority: Blocker
> Fix For: 0.94.0
>
> Attachments: 5782-lars-v2.txt, 5782-sketch.txt, 5782.txt,
> 5782.unfinished-stack.txt, HBASE-5782.patch, hbase-5782.txt
>
>
> Create a table with 1000 splits, after the region assignemnt, kill the
> regionserver wich contains META table.
> Here few regions are missing after the log splitting and region assigment.
> HBCK report shows multiple region holes are got created.
> Same scenario was verified mulitple times in 0.92.1, no issues.
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