Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2205#discussion_r183362086
--- Diff: store/search/src/main/scala/org/apache/spark/rpc/Scheduler.scala
---
@@ -0,0 +1,116 @@
+/*
+ * 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.rpc
+
+import java.io.IOException
+import java.util.concurrent.atomic.AtomicInteger
+
+import scala.collection.mutable
+import scala.concurrent.Future
+import scala.reflect.ClassTag
+import scala.util.Random
+
+import org.apache.carbondata.core.util.CarbonProperties
+
+/**
+ * [[org.apache.spark.rpc.Master]] uses Scheduler to pick a Worker to send
request
+ */
+private[rpc] class Scheduler {
+ private val workers = mutable.Map[String, Schedulable]()
+ private val random = new Random()
+
+ /**
+ * Pick a Worker according to the address and workload of the Worker
+ * Invoke the RPC and return Future result
+ */
+ def sendRequestAsync[T: ClassTag](
+ splitAddress: String,
+ request: Any): (Schedulable, Future[T]) = {
+ require(splitAddress != null)
+ if (workers.isEmpty) {
+ throw new IOException("No worker is available")
+ }
+ var worker = pickWorker(splitAddress)
+
+ // check whether worker exceed max workload, if exceeded, pick another
worker
+ val maxWorkload =
CarbonProperties.getMaxWorkloadForWorker(worker.cores)
+ var numTry = 10
--- End diff --
ok, I will change it to the number of workers (workers.size())
---
