panbingkun commented on code in PR #45975:
URL: https://github.com/apache/spark/pull/45975#discussion_r1560455923
##########
common/utils/src/test/scala/org/apache/spark/util/MDCSuite.scala:
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@@ -41,6 +41,21 @@ class MDCSuite
assert(log.context === Map("exit_code" -> "CustomObjectValue: spark,
10086").asJava)
}
+ test("null as MDC value") {
+ val log = log"This is a log, exitcode ${MDC(EXIT_CODE, null)}"
+ assert(log.message === "This is a log, exitcode null")
+ assert(log.context === Map("exit_code" -> null).asJava)
+ }
Review Comment:
@gengliangwang
This is an example, when the value of MDC is `null`.
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