divijvaidya commented on code in PR #13798:
URL: https://github.com/apache/kafka/pull/13798#discussion_r1243425245
##########
core/src/main/scala/kafka/server/AddPartitionsToTxnManager.scala:
##########
@@ -90,30 +109,34 @@ class AddPartitionsToTxnManager(config: KafkaConfig,
client: NetworkClient, time
topicPartitionsToError.put(new TopicPartition(topic.name, partition),
error)
}
}
+ verificationFailureRate.mark(topicPartitionsToError.size)
topicPartitionsToError.toMap
}
+ private def sendCallback(callback: AddPartitionsToTxnManager.AppendCallback,
errorMap: Map[TopicPartition, Errors], startTime: Long): Unit = {
Review Comment:
s/startTime/startTimeMs so that it is clear what the units are
##########
core/src/main/scala/kafka/network/RequestChannel.scala:
##########
@@ -240,17 +240,18 @@ object RequestChannel extends Logging {
val responseSendTimeMs = nanosToMs(endTimeNanos -
responseDequeueTimeNanos)
val messageConversionsTimeMs = nanosToMs(messageConversionsTimeNanos)
val totalTimeMs = nanosToMs(endTimeNanos - startTimeNanos)
- val fetchMetricNames =
+ val overrideMetricNames =
if (header.apiKey == ApiKeys.FETCH) {
- val isFromFollower = body[FetchRequest].isFromFollower
- Seq(
- if (isFromFollower) RequestMetrics.followFetchMetricName
+ val specifiedMetricName =
+ if (body[FetchRequest].isFromFollower)
RequestMetrics.followFetchMetricName
else RequestMetrics.consumerFetchMetricName
- )
+ Seq(specifiedMetricName, header.apiKey.name)
+ } else if (header.apiKey == ApiKeys.ADD_PARTITIONS_TO_TXN &&
body[AddPartitionsToTxnRequest].allVerifyOnlyRequest()) {
Review Comment:
nit
allVerifyOnlyRequest() parenthesis is optional in scala
##########
core/src/main/scala/kafka/server/AddPartitionsToTxnManager.scala:
##########
@@ -47,13 +55,19 @@ class AddPartitionsToTxnManager(config: KafkaConfig,
client: NetworkClient, time
private val inflightNodes = mutable.HashSet[Node]()
private val nodesToTransactions = mutable.Map[Node,
TransactionDataAndCallbacks]()
+ private val metricsGroup = new KafkaMetricsGroup(this.getClass)
+ val verificationFailureRate =
metricsGroup.newMeter("VerificationFailureRate", "failures", TimeUnit.SECONDS)
+ val verificationTimeMs = metricsGroup.newHistogram("VerificationTimeMs")
Review Comment:
Thank you for the explanation. Makes sense.
> 1\ use a biased histogram
Could also also please respond to comment around usage of a biased histogram
##########
core/src/main/scala/kafka/server/AddPartitionsToTxnManager.scala:
##########
@@ -17,25 +17,37 @@
package kafka.server
+import
kafka.server.AddPartitionsToTxnManager.{verificationFailureRateMetricName,
verificationTimeMsMetricName}
import kafka.utils.Logging
import org.apache.kafka.clients.{ClientResponse, NetworkClient,
RequestCompletionHandler}
import org.apache.kafka.common.{Node, TopicPartition}
import
org.apache.kafka.common.message.AddPartitionsToTxnRequestData.{AddPartitionsToTxnTransaction,
AddPartitionsToTxnTransactionCollection}
import org.apache.kafka.common.protocol.Errors
import org.apache.kafka.common.requests.{AddPartitionsToTxnRequest,
AddPartitionsToTxnResponse}
import org.apache.kafka.common.utils.Time
+import org.apache.kafka.server.metrics.KafkaMetricsGroup
import org.apache.kafka.server.util.{InterBrokerSendThread,
RequestAndCompletionHandler}
import java.util
+import java.util.concurrent.TimeUnit
import scala.collection.mutable
object AddPartitionsToTxnManager {
type AppendCallback = Map[TopicPartition, Errors] => Unit
+
+ val verificationFailureRateMetricName = "VerificationFailureRate"
Review Comment:
nit
constant variables start from capital letter (pascal case) in Kafka code
base from what I have observed
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