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Posted to notifications@iotdb.apache.org by "Wei Shao (Jira)" <ji...@apache.org> on 2020/10/23 02:16:00 UTC
[jira] [Assigned] (IOTDB-954) Parallel auto-creating schema may
write unrecognizable timeseries in mlog.txt
[ https://issues.apache.org/jira/browse/IOTDB-954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wei Shao reassigned IOTDB-954:
------------------------------
Assignee: Wei Shao
> Parallel auto-creating schema may write unrecognizable timeseries in mlog.txt
> -----------------------------------------------------------------------------
>
> Key: IOTDB-954
> URL: https://issues.apache.org/jira/browse/IOTDB-954
> Project: Apache IoTDB
> Issue Type: Bug
> Components: Core/Engine
> Reporter: Wei Shao
> Assignee: Wei Shao
> Priority: Major
> Attachments: Screen Shot 2020-10-22 at 12.12.09 PM.png, Screen Shot 2020-10-22 at 12.16.15 PM.png
>
>
> When writing to IoTDB server with multiple clients at the same time, it turns out that the auto create schema operation may write incorrect timeseries into mlog.
> It’s probably a synchronization issue. The _createTimeseries()_ in mLogWriter.java is not atomic, causing the content in mlog.txt not readable.
> This issue may cause errors when doing recover for IoTDB. See the screenshots attached.
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