Github user skonto commented on a diff in the pull request:
https://github.com/apache/spark/pull/22381#discussion_r224071384
--- Diff: core/src/main/scala/org/apache/spark/status/AppStatusSource.scala
---
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.status
+
+import java.util.concurrent.atomic.AtomicLong
+
+import com.codahale.metrics.{Gauge, MetricRegistry}
+
+import org.apache.spark.SparkConf
+import org.apache.spark.internal.config.ConfigBuilder
+import org.apache.spark.metrics.source.Source
+
+private [spark] class JobDuration(val value: AtomicLong) extends
Gauge[Long] {
+ override def getValue: Long = value.get()
+}
+
+private[spark] class AppStatusSource extends Source {
+
+ override val metricRegistry = new MetricRegistry()
+
+ override val sourceName = "appStatus"
+
+ val jobDuration = new JobDuration(new AtomicLong(0L))
+
+ // Duration of each job in milliseconds
+ val JOB_DURATION = metricRegistry
+ .register(MetricRegistry.name("jobDuration"), jobDuration)
+
+ val FAILED_STAGES =
metricRegistry.counter(MetricRegistry.name("failedStages"))
--- End diff --
ok makes sense
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