MINOR: Fix some Request toString methods (#19655)

Reviewers: Colin P. McCabe <cmccabe@apache.org>

checkstyle/import-control.xml

@@ -199,6 +199,8 @@
       <allow pkg="io.opentelemetry.proto"/>
       <!-- for testing -->
       <allow pkg="org.apache.kafka.common.telemetry" />
+      <!-- for IncrementalAlterConfigsRequest and AlterUserScramCredentialsRequest -->
+      <allow pkg="com.fasterxml.jackson.databind" />
     </subpackage>
 
     <subpackage name="serialization">

clients/src/main/java/org/apache/kafka/common/requests/AbstractRequest.java

@@ -138,7 +138,7 @@ public abstract class AbstractRequest implements AbstractRequestResponse {
     }
 
     @Override
-    public final String toString() {
+    public String toString() {
         return toString(true);
     }
 

clients/src/main/java/org/apache/kafka/common/requests/AlterUserScramCredentialsRequest.java

@@ -17,10 +17,14 @@
 package org.apache.kafka.common.requests;
 
 import org.apache.kafka.common.message.AlterUserScramCredentialsRequestData;
+import org.apache.kafka.common.message.AlterUserScramCredentialsRequestDataJsonConverter;
 import org.apache.kafka.common.message.AlterUserScramCredentialsResponseData;
 import org.apache.kafka.common.protocol.ApiKeys;
 import org.apache.kafka.common.protocol.Readable;
 
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -81,4 +85,16 @@ public class AlterUserScramCredentialsRequest extends AbstractRequest {
                         .collect(Collectors.toList());
         return new AlterUserScramCredentialsResponse(new AlterUserScramCredentialsResponseData().setResults(results));
     }
+
+    // Do not print salt or saltedPassword
+    @Override
+    public String toString() {
+        JsonNode json = AlterUserScramCredentialsRequestDataJsonConverter.write(data, version()).deepCopy();
+
+        for (JsonNode upsertion : json.get("upsertions")) {
+            ((ObjectNode) upsertion).put("salt", "");
+            ((ObjectNode) upsertion).put("saltedPassword", "");
+        }
+        return AlterUserScramCredentialsRequestDataJsonConverter.read(json, version()).toString();
+    }
 }

clients/src/main/java/org/apache/kafka/common/requests/IncrementalAlterConfigsRequest.java

@@ -21,11 +21,15 @@ import org.apache.kafka.clients.admin.AlterConfigOp;
 import org.apache.kafka.common.config.ConfigResource;
 import org.apache.kafka.common.message.IncrementalAlterConfigsRequestData;
 import org.apache.kafka.common.message.IncrementalAlterConfigsRequestData.AlterConfigsResource;
+import org.apache.kafka.common.message.IncrementalAlterConfigsRequestDataJsonConverter;
 import org.apache.kafka.common.message.IncrementalAlterConfigsResponseData;
 import org.apache.kafka.common.message.IncrementalAlterConfigsResponseData.AlterConfigsResourceResponse;
 import org.apache.kafka.common.protocol.ApiKeys;
 import org.apache.kafka.common.protocol.Readable;
 
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
 import java.util.Collection;
 import java.util.Map;
 
@@ -106,4 +110,16 @@ public class IncrementalAlterConfigsRequest extends AbstractRequest {
         }
         return new IncrementalAlterConfigsResponse(response);
     }
+
+    // It is not safe to print all config values
+    @Override
+    public String toString() {
+        JsonNode json = IncrementalAlterConfigsRequestDataJsonConverter.write(data, version()).deepCopy();
+        for (JsonNode resource : json.get("resources")) {
+            for (JsonNode config : resource.get("configs")) {
+                ((ObjectNode) config).put("value", "REDACTED");
+            }
+        }
+        return IncrementalAlterConfigsRequestDataJsonConverter.read(json, version()).toString();
+    }
 }

core/src/test/scala/unit/kafka/network/RequestChannelTest.scala

@@ -131,11 +131,21 @@ class RequestChannelTest {
                      op: OpType,
                      entries: Map[String, String],
                      expectedValues: Map[String, String]): Unit = {
-      val alterConfigs = request(incrementalAlterConfigs(resource, entries, op))
-      val loggableAlterConfigs = alterConfigs.loggableRequest.asInstanceOf[IncrementalAlterConfigsRequest]
+      val alterConfigs = incrementalAlterConfigs(resource, entries, op)
+      val alterConfigsString = alterConfigs.toString
+      entries.foreach { entry =>
+        if (!alterConfigsString.contains(entry._1)) {
+          fail("Config names should be in the request string")
+        }
+        if (entry._2 != null && alterConfigsString.contains(entry._2)) {
+          fail("Config values should not be in the request string")
+        }
+      }
+      val req = request(alterConfigs)
+      val loggableAlterConfigs = req.loggableRequest.asInstanceOf[IncrementalAlterConfigsRequest]
       val loggedConfig = loggableAlterConfigs.data.resources.find(resource.`type`.id, resource.name).configs
       assertEquals(expectedValues, toMap(loggedConfig))
-      val alterConfigsDesc = RequestConvertToJson.requestDesc(alterConfigs.header, alterConfigs.requestLog.toJava, alterConfigs.isForwarded).toString
+      val alterConfigsDesc = RequestConvertToJson.requestDesc(req.header, req.requestLog.toJava, req.isForwarded).toString
       assertFalse(alterConfigsDesc.contains(sensitiveValue), s"Sensitive config logged $alterConfigsDesc")
     }
 

core/src/test/scala/unit/kafka/server/AlterUserScramCredentialsRequestTest.scala

@@ -244,6 +244,9 @@ class AlterUserScramCredentialsRequestTest extends BaseRequestTest {
     // create a bunch of credentials
     val request1_0 = new AlterUserScramCredentialsRequest.Builder(
       new AlterUserScramCredentialsRequestData()
+        .setDeletions(util.Arrays.asList(
+          new AlterUserScramCredentialsRequestData.ScramCredentialDeletion()
+            .setName(user2).setMechanism(ScramMechanism.SCRAM_SHA_256.`type`)))
         .setUpsertions(util.Arrays.asList(
           new AlterUserScramCredentialsRequestData.ScramCredentialUpsertion()
             .setName(user1).setMechanism(ScramMechanism.SCRAM_SHA_256.`type`)
@@ -251,10 +254,15 @@ class AlterUserScramCredentialsRequestTest extends BaseRequestTest {
             .setSalt(saltBytes)
             .setSaltedPassword(saltedPasswordBytes),
         ))).build()
+    assertEquals("AlterUserScramCredentialsRequestData(" +
+      "deletions=[ScramCredentialDeletion(name='" + user2 + "', mechanism=" + ScramMechanism.SCRAM_SHA_256.`type` + ")], " +
+      "upsertions=[ScramCredentialUpsertion(name='" + user1 + "', mechanism=" + ScramMechanism.SCRAM_SHA_256.`type` +
+      ", iterations=4096, salt=[], saltedPassword=[])])", request1_0.toString)
     val results1_0 = sendAlterUserScramCredentialsRequest(request1_0).data.results
-    assertEquals(1, results1_0.size)
-    checkNoErrorsAlteringCredentials(results1_0)
+    assertEquals(2, results1_0.size)
+    assertEquals(1, results1_0.asScala.count(_.errorCode == Errors.RESOURCE_NOT_FOUND.code()))
     checkUserAppearsInAlterResults(results1_0, user1)
+    checkUserAppearsInAlterResults(results1_0, user2)
 
     // When creating credentials, do not update the same user more than once per request
     val request1_1 = new AlterUserScramCredentialsRequest.Builder(
@@ -276,6 +284,8 @@ class AlterUserScramCredentialsRequestTest extends BaseRequestTest {
             .setSalt(saltBytes)
             .setSaltedPassword(saltedPasswordBytes),
         ))).build()
+    assertFalse(request1_1.toString.contains(saltBytes))
+    assertFalse(request1_1.toString.contains(saltedPasswordBytes))
     val results1_1 = sendAlterUserScramCredentialsRequest(request1_1).data.results
     assertEquals(3, results1_1.size)
     checkNoErrorsAlteringCredentials(results1_1)

core/src/test/scala/unit/kafka/server/KafkaApisTest.scala

@@ -9752,7 +9752,12 @@ class KafkaApisTest extends Logging {
 
   @Test
   def testEmptyIncrementalAlterConfigsRequestWithKRaft(): Unit = {
-    val request = buildRequest(new IncrementalAlterConfigsRequest(new IncrementalAlterConfigsRequestData(), 1.toShort))
+    val alterConfigsRequest = new IncrementalAlterConfigsRequest(new IncrementalAlterConfigsRequestData(), 1.toShort)
+    assertEquals(
+      "IncrementalAlterConfigsRequestData(resources=[], validateOnly=false)",
+      alterConfigsRequest.toString
+    )
+    val request = buildRequest(alterConfigsRequest)
     metadataCache = new KRaftMetadataCache(brokerId, () => KRaftVersion.KRAFT_VERSION_0)
     when(clientRequestQuotaManager.maybeRecordAndGetThrottleTimeMs(any[RequestChannel.Request](),
       any[Long])).thenReturn(0)
@@ -9764,15 +9769,23 @@ class KafkaApisTest extends Logging {
 
   @Test
   def testLog4jIncrementalAlterConfigsRequestWithKRaft(): Unit = {
-    val request = buildRequest(new IncrementalAlterConfigsRequest(new IncrementalAlterConfigsRequestData().
+    val alterConfigsRequest = new IncrementalAlterConfigsRequest(new IncrementalAlterConfigsRequestData().
       setValidateOnly(true).
       setResources(new IAlterConfigsResourceCollection(asList(new IAlterConfigsResource().
         setResourceName(brokerId.toString).
         setResourceType(BROKER_LOGGER.id()).
         setConfigs(new IAlterableConfigCollection(asList(new IAlterableConfig().
           setName(LoggingController.ROOT_LOGGER).
-          setValue("TRACE")).iterator()))).iterator())),
-        1.toShort))
+          setValue("TRACE")).iterator()))).iterator())), 1.toShort)
+    assertEquals(
+      "IncrementalAlterConfigsRequestData(resources=[" +
+        "AlterConfigsResource(resourceType=" + BROKER_LOGGER.id() + ", " +
+        "resourceName='"+ brokerId + "', " +
+        "configs=[AlterableConfig(name='" + LoggingController.ROOT_LOGGER + "', configOperation=0, value='REDACTED')])], " +
+        "validateOnly=true)",
+      alterConfigsRequest.toString
+    )
+    val request = buildRequest(alterConfigsRequest)
     metadataCache = new KRaftMetadataCache(brokerId, () => KRaftVersion.KRAFT_VERSION_0)
     when(clientRequestQuotaManager.maybeRecordAndGetThrottleTimeMs(any[RequestChannel.Request](),
       any[Long])).thenReturn(0)