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https://issues.apache.org/jira/browse/STORM-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15147177#comment-15147177
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ASF GitHub Bot commented on STORM-1232:
---------------------------------------

Github user abhishekagarwal87 commented on a diff in the pull request:

    https://github.com/apache/storm/pull/1108#discussion_r52881453
  
    --- Diff: 
storm-core/src/jvm/org/apache/storm/scheduler/DefaultScheduler.java ---
    @@ -0,0 +1,110 @@
    +/**
    + * 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.storm.scheduler;
    +
    +import java.util.HashMap;
    +import java.util.HashSet;
    +import java.util.List;
    +import java.util.Map;
    +import java.util.Map.Entry;
    +import java.util.Set;
    +
    +import org.apache.storm.utils.Utils;
    +
    +public class DefaultScheduler implements IScheduler {
    +
    +    private static Set<WorkerSlot> badSlots(Map<WorkerSlot, 
List<ExecutorDetails>> existingSlots, int numExecutors, int numWorkers) {
    +        if (numWorkers != 0) {
    +            Map<Integer, Integer> distribution = 
Utils.integerDivided(numExecutors, numWorkers);
    +            Set<WorkerSlot> _slots = new HashSet<WorkerSlot>();
    +
    +            for (Entry<WorkerSlot, List<ExecutorDetails>> entry : 
existingSlots.entrySet()) {
    +                Integer executorCount = 
distribution.get(entry.getValue().size());
    +                if (executorCount != null && executorCount > 0) {
    +                    _slots.add(entry.getKey());
    +                    executorCount--;
    +                    distribution.put(entry.getValue().size(), 
executorCount);
    +                }
    +            }
    +
    +            for (WorkerSlot slot : _slots) {
    +                existingSlots.remove(slot);                
    --- End diff --
    
    very minor. It can be replaced with - 
existingSlots.entrySet().removeAll(_slots). 


> port  backtype.storm.scheduler.DefaultScheduler to java
> -------------------------------------------------------
>
>                 Key: STORM-1232
>                 URL: https://issues.apache.org/jira/browse/STORM-1232
>             Project: Apache Storm
>          Issue Type: New Feature
>          Components: storm-core
>            Reporter: Robert Joseph Evans
>            Assignee: Xin Wang
>              Labels: java-migration, jstorm-merger
>
> port the DefaultScheduler to java



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