[JackieTien97]

REST v1 and v2 unconditionally logged exception stack traces, including invalid SQL and other expected query failures. Extract the logging policy from ErrorHandlingUtils.onQueryException and share it with both REST exception handlers: expected errors log at INFO without a stack trace, storage-engine-not-ready errors remain silent, and other errors retain WARN stack traces. Existing REST response codes and messages are unchanged.

Add parameterized regression coverage for both REST versions, checking response compatibility, log levels, and the presence or absence of stack traces.

Validation: mvn clean test -pl iotdb-core/datanode -am -Dtest=ExceptionHandlerTest,ErrorHandlingUtilsTest -Dsurefire.failIfNoSpecifiedTests=false -DfailIfNoTests=false with JDK 17. Build passed; all 12 tests passed. Spotless and git diff --check passed.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
1.1% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.49%. Comparing base (7526403) to head (6cd7878).

Additional details and impacted files

@@            Coverage Diff             @@
##             dev/1.3   #19280   +/-   ##
==========================================
  Coverage      47.49%   47.49%           
  Complexity       221      221           
==========================================
  Files           3678     3678           
  Lines         252123   252126    +3     
  Branches       31360    31359    -1     
==========================================
+ Hits          119740   119751   +11     
+ Misses        132383   132375    -8     

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