Handle null logger name for acceptable check (#2145)

* Handle null logger name for acceptable check

* Update logstage/logstage-core/.jvm/src/main/scala/izumi/logstage/adapter/jul/LogstageJulLogger.scala

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Co-authored-by: Kai <[email protected]>

Author: cholmes-axoni

logstage/logstage-core/.jvm/src/main/scala/izumi/logstage/adapter/jul/LogstageJulLogger.scala

@@ -19,7 +19,8 @@ import scala.collection.compat.immutable.ArraySeq
 class LogstageJulLogger(router: LogRouter) extends java.util.logging.Handler with JULTools with AutoCloseable {
   override def publish(record: LogRecord): Unit = {
     val level = toLevel(record)
-    if (router.acceptable(Log.LoggerId(record.getLoggerName), level)) {
+    val loggerName = record.getLoggerName match { case null => "null"; case s => s }
+    if (router.acceptable(Log.LoggerId(loggerName), level)) {
       router.log(mkEntry(record))
     }
   }