gengliangwang commented on code in PR #47500:
URL: https://github.com/apache/spark/pull/47500#discussion_r1730622388
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common/utils/src/main/scala/org/apache/spark/internal/Logging.scala:
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@@ -391,7 +392,8 @@ trait Logging {
private[spark] object Logging {
@volatile private var initialized = false
@volatile private var defaultRootLevel: Level = null
- @volatile private var defaultSparkLog4jConfig = false
+ @volatile private var shouldUseDefaultSparkLog4jConfig = false
+ @volatile private var defaultSparkLog4jConfigApplied = false
Review Comment:
```
$ git grep defaultSparkLog4jConfigApplied
common/utils/src/main/scala/org/apache/spark/internal/Logging.scala:
Logging.defaultSparkLog4jConfigApplied = true
common/utils/src/main/scala/org/apache/spark/internal/Logging.scala:
@volatile private var defaultSparkLog4jConfigApplied = false
common/utils/src/main/scala/org/apache/spark/internal/Logging.scala:
defaultSparkLog4jConfigApplied = false
```
The variable `defaultSparkLog4jConfigApplied` is write-only and does not
appear to be used in any conditional checks.
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