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https://issues.apache.org/jira/browse/TEPHRA-297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Philippe Laflamme updated TEPHRA-297:
-------------------------------------
Affects Version/s: (was: 0.14.0-incubating)
0.15.0-incubating
> Inconsistent reads
> ------------------
>
> Key: TEPHRA-297
> URL: https://issues.apache.org/jira/browse/TEPHRA-297
> Project: Tephra
> Issue Type: Bug
> Affects Versions: 0.15.0-incubating
> Reporter: Philippe Laflamme
> Assignee: Poorna Chandra
> Priority: Major
>
> It is possible to get inconsistent reads in the following test setup:
> * modify the BalanceBooks example to verify the balance periodically (say
> every second) as opposed to only at the end.
> * start multiple transaction servers
> * start the modified BalanceBooks example
> * randomly restart the transaction servers
> Running this for long enough will eventually lead to the balance verification
> to fail, reading uncommitted or partially committed data.
> The modified BalanceBooks example can be found here:
> https://github.com/plaflamme/incubator-tephra/commit/6caeff5d76f193cdf2e0ad861059bc19cf894705
> The logs of the various services can be found here:
> [https://gist.github.com/plaflamme/238a6539da9da1ac3a2e313e05ee82eb]
> In my experimentation, I've found that this problem usually happens after the
> transaction server fails to write its snapshot during shutdown. It may be
> unrelated, but this exception usually shows up in the logs around the time
> when the issue is seen on the client.
> This is the relevant section in the logs:
> [https://gist.github.com/plaflamme/238a6539da9da1ac3a2e313e05ee82eb#file-tephra-service-hbase-master-log-L1360-L1878]
> I've sent a message to the mailing list about this problem:
> [https://mail-archives.apache.org/mod_mbox/tephra-dev/201812.mbox/%3CCAFYs7S9BgPs_A-1E-K3Q06BfiO7W%3Dh3mZD6-vkjb14R29C-bKw%40mail.gmail.com%3E]
> Sorry for the noise, but perhaps a JIRA issue is more appropriate for
> discussing this.
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