apovzner commented on a change in pull request #9628:
URL: https://github.com/apache/kafka/pull/9628#discussion_r535830690



##########
File path: core/src/test/scala/unit/kafka/admin/ConfigCommandTest.scala
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@@ -472,6 +512,134 @@ class ConfigCommandTest extends ZooKeeperTestHarness with 
Logging {
     EasyMock.reset(alterResult, describeResult)
   }
 
+  @Test
+  def shouldNotAlterNonQuotaIpConfigsUsingBootstrapServer(): Unit = {
+    // when using --bootstrap-server, it should be illegal to alter anything 
that is not a connection quota
+    // for ip entities
+    val node = new Node(1, "localhost", 9092)
+    val mockAdminClient = new 
MockAdminClient(util.Collections.singletonList(node), node)
+
+    def verifyCommand(entityType: String, alterOpts: String*): Unit = {
+      val opts = new ConfigCommandOptions(Array("--bootstrap-server", 
"localhost:9092",
+        "--entity-type", entityType, "--entity-name", "admin",
+        "--alter") ++ alterOpts)
+      val e = intercept[IllegalArgumentException] {
+        ConfigCommand.alterConfig(mockAdminClient, opts)
+      }
+      assertTrue(s"Unexpected exception: $e", 
e.getMessage.contains("some_config"))
+    }
+
+    verifyCommand("ips", "--add-config", 
"connection_creation_rate=10000,some_config=10")

Review comment:
       super tiny nit: `verifyCommand` name makes the code a bit confusing 
since the command is expected to fail. What about `verifyCommandFails` or 
`verifyFails`?




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