[jira] [Assigned] (IOTDB-3843) Refine the using of setting read-only

["Jialin Qiao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IOTDB-3843?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jialin Qiao reassigned IOTDB-3843:
----------------------------------

    Assignee: Haiming Zhu

> Refine the using of setting read-only
> -------------------------------------
>
>                 Key: IOTDB-3843
>                 URL: https://issues.apache.org/jira/browse/IOTDB-3843
>             Project: Apache IoTDB
>          Issue Type: Improvement
>            Reporter: Jialin Qiao
>            Assignee: Haiming Zhu
>            Priority: Major
>
> We now abuse the system read-only, which is a dangerous operation.
> Even worse, when system is set to read-only, I could not find why we set it to read-only, there is no related log.
>  
> We only set read-only when losing data continuously, otherwise, we must store more data as we can.
>  
> (1) In the IoTDBConfig.setReadOnly() function, if it receive a true, we need to log the stack trace with the information "change system mode to read-only". To avoid missing the log outside.
> if (readOnly)
> { logger.error("change system mode to read-only", new RuntimeException()); }
> (2) Check all places that set read-only, this is a dangerous operation in the deployment environment, and we should avoid using this if not necessary.



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