KAFKA-12454: Add ERROR logging on kafka-log-dirs when given brokerIds do not exist in current kafka cluster

core/src/main/scala/kafka/admin/LogDirsCommand.scala

@@ -39,19 +39,29 @@ object LogDirsCommand {
     def describe(args: Array[String], out: PrintStream): Unit = {
         val opts = new LogDirsCommandOptions(args)
         val adminClient = createAdminClient(opts)
-        val topicList = opts.options.valueOf(opts.topicListOpt).split(",").filter(!_.isEmpty)
-        val brokerList = Option(opts.options.valueOf(opts.brokerListOpt)) match {
-            case Some(brokerListStr) => brokerListStr.split(',').filter(!_.isEmpty).map(_.toInt)
-            case None => adminClient.describeCluster().nodes().get().asScala.map(_.id()).toArray
-        }
+        val topicList = opts.options.valueOf(opts.topicListOpt).split(",").filter(_.nonEmpty)
+        try {
+            val clusterBrokers = adminClient.describeCluster().nodes().get().asScala.map(_.id()).toSet
+            val (existingBrokers, nonExistingBrokers) = Option(opts.options.valueOf(opts.brokerListOpt)) match {
+                case Some(brokerListStr) =>
+                    val inputBrokers = brokerListStr.split(',').filter(_.nonEmpty).map(_.toInt).toSet
+                    (inputBrokers, inputBrokers.diff(clusterBrokers))
+                case None => (clusterBrokers, Set.empty)
+            }
 
-        out.println("Querying brokers for log directories information")
-        val describeLogDirsResult: DescribeLogDirsResult = adminClient.describeLogDirs(brokerList.map(Integer.valueOf).toSeq.asJava)
-        val logDirInfosByBroker = describeLogDirsResult.allDescriptions.get().asScala.map { case (k, v) => k -> v.asScala }
+            if (nonExistingBrokers.nonEmpty) {
+                out.println(s"ERROR: The given node(s) does not exist from broker-list: ${nonExistingBrokers.mkString(",")}. Current cluster exist node(s): ${clusterBrokers.mkString(",")}")
+            } else {
+                out.println("Querying brokers for log directories information")
+                val describeLogDirsResult: DescribeLogDirsResult = adminClient.describeLogDirs(existingBrokers.map(Integer.valueOf).toSeq.asJava)
+                val logDirInfosByBroker = describeLogDirsResult.allDescriptions.get().asScala.map { case (k, v) => k -> v.asScala }
 
-        out.println(s"Received log directory information from brokers ${brokerList.mkString(",")}")
-        out.println(formatAsJson(logDirInfosByBroker, topicList.toSet))
-        adminClient.close()
+                out.println(s"Received log directory information from brokers ${existingBrokers.mkString(",")}")
+                out.println(formatAsJson(logDirInfosByBroker, topicList.toSet))
+            }
+        } finally {
+            adminClient.close()
+        }
     }
 
     private def formatAsJson(logDirInfosByBroker: Map[Integer, Map[String, LogDirDescription]], topicSet: Set[String]): String = {

core/src/test/scala/unit/kafka/admin/LogDirsCommandTest.scala

@@ -0,0 +1,52 @@
+package unit.kafka.admin
+
+import java.io.{ByteArrayOutputStream, PrintStream}
+import java.nio.charset.StandardCharsets
+
+import kafka.admin.LogDirsCommand
+import kafka.integration.KafkaServerTestHarness
+import kafka.server.KafkaConfig
+import kafka.utils.TestUtils
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.Test
+
+import scala.collection.Seq
+
+class LogDirsCommandTest extends KafkaServerTestHarness {
+
+  def generateConfigs: Seq[KafkaConfig] = {
+    TestUtils.createBrokerConfigs(1, zkConnect)
+      .map(KafkaConfig.fromProps)
+  }
+
+  @Test
+  def checkLogDirsCommandOutput(): Unit = {
+    val byteArrayOutputStream = new ByteArrayOutputStream
+    val printStream = new PrintStream(byteArrayOutputStream, false, StandardCharsets.UTF_8.name())
+    //input exist brokerList
+    LogDirsCommand.describe(Array("--bootstrap-server", brokerList, "--broker-list", "0", "--describe"), printStream)
+    val existBrokersContent = new String(byteArrayOutputStream.toByteArray, StandardCharsets.UTF_8)
+    val existBrokersLineIter = existBrokersContent.split("\n").iterator
+
+    assertTrue(existBrokersLineIter.hasNext)
+    assertTrue(existBrokersLineIter.next().contains(s"Querying brokers for log directories information"))
+
+    //input nonExist brokerList
+    byteArrayOutputStream.reset()
+    LogDirsCommand.describe(Array("--bootstrap-server", brokerList, "--broker-list", "0,1,2", "--describe"), printStream)
+    val nonExistBrokersContent = new String(byteArrayOutputStream.toByteArray, StandardCharsets.UTF_8)
+    val nonExistBrokersLineIter = nonExistBrokersContent.split("\n").iterator
+
+    assertTrue(nonExistBrokersLineIter.hasNext)
+    assertTrue(nonExistBrokersLineIter.next().contains(s"ERROR: The given node(s) does not exist from broker-list: 1,2. Current cluster exist node(s): 0"))
+
+    //use all brokerList for current cluster
+    byteArrayOutputStream.reset()
+    LogDirsCommand.describe(Array("--bootstrap-server", brokerList, "--describe"), printStream)
+    val allBrokersContent = new String(byteArrayOutputStream.toByteArray, StandardCharsets.UTF_8)
+    val allBrokersLineIter = allBrokersContent.split("\n").iterator
+
+    assertTrue(allBrokersLineIter.hasNext)
+    assertTrue(allBrokersLineIter.next().contains(s"Querying brokers for log directories information"))
+  }
+}