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

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

Jialin Qiao created IOTDB-3843:
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             Summary: 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


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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