Fix target series duplicate in task.

src/component/dataZoom/dataZoomProcessor.js

 import * as echarts from '../../echarts';
+import {createHashMap, each} from 'zrender/src/core/util';
 
 echarts.registerProcessor({
+
     getTargetSeries: function (ecModel) {
-        var seriesModels = [];
+        var seriesModelMap = createHashMap();
+
         ecModel.eachComponent('dataZoom', function (dataZoomModel) {
             dataZoomModel.eachTargetAxis(function (dimNames, axisIndex, dataZoomModel) {
                 var axisProxy = dataZoomModel.getAxisProxy(dimNames.name, axisIndex);
-                seriesModels = seriesModels.concat(axisProxy.getTargetSeriesModels());
+                each(axisProxy.getTargetSeriesModels(), function (seriesModel) {
+                    seriesModelMap.set(seriesModel.uid, seriesModel);
+                });
             });
         });
-        return seriesModels;
+
+        return seriesModelMap;
     },
+
     // Consider appendData, where filter should be performed. Because data process is
     // in block mode currently, it is not need to worry about that the overallProgress
     // execute every frame.

src/stream/Scheduler.js

@@ -243,7 +243,7 @@ function createSeriesStageTask(scheduler, stageHandler, stageHandlerRecord, ecMo
         ecModel.eachRawSeriesByType(seriesType, create);
     }
     else if (getTargetSeries) {
-        each(getTargetSeries(ecModel, api), create);
+        getTargetSeries(ecModel, api).each(create);
     }
 
     function create(seriesModel) {
@@ -311,7 +311,7 @@ function createOverallStageTask(scheduler, stageHandler, stageHandlerRecord, ecM
         ecModel.eachRawSeriesByType(seriesType, createStub);
     }
     else if (getTargetSeries) {
-        each(getTargetSeries(ecModel, api), createStub);
+        getTargetSeries(ecModel, api).each(createStub);
     }
     // Otherwise, (usually it is legancy case), the overall task will only be
     // executed when upstream dirty. Otherwise the progressive rendering of all
@@ -442,12 +442,6 @@ function seriesTaskReset(context, upstreamContext) {
     ));
     unmountTaskMethods(this);
     if (resetDefines.length) {
-        // ???! temp experiment
-        // if (resetDefines[0].filter) {
-        //     context.model.setData(
-        //         context.outputData = context.data.cloneShallow()
-        //     );
-        // }
         return seriesTaskProgress;
     }
 }
@@ -467,11 +461,6 @@ function seriesTaskProgress(params, context) {
         else if (resetDefine && resetDefine.progress) {
             resetDefine.progress(params, data);
         }
-        // else if (resetDefine && resetDefine.filter) {
-            // ???! temp experiment
-            // if (k !== 0) {throw new Error();}
-            // return context.data.filterTo(params, context.outputData, resetDefine.filter);
-        // }
     }
     unmountTaskMethods(this);
 }

src/stream/task.js

@@ -132,7 +132,7 @@ taskProto.unfinished = function () {
  */
 taskProto.pipe = function (downTask) {
     if (__DEV__) {
-        assert(downTask && !downTask._disposed);
+        assert(downTask && !downTask._disposed && downTask !== this);
     }
 
     // If already downstream, do not dirty downTask.

src/visual/dataColor.js

 // Pick color from palette for each data item.
 // Applicable for charts that require applying color palette
 // in data level (like pie, funnel, chord).
+import {createHashMap} from 'zrender/src/core/util';
 
 export default function (seriesType) {
     return {
         getTargetSeries: function (ecModel) {
             // Pie and funnel may use diferrent scope
             var paletteScope = {};
-            var seiresModels = [];
+            var seiresModelMap = createHashMap();
 
             ecModel.eachSeriesByType(seriesType, function (seriesModel) {
                 seriesModel.__paletteScope = paletteScope;
-                seiresModels.push(seriesModel);
+                seiresModelMap.set(seriesModel.uid, seriesModel);
             });
-            return seiresModels;
+
+            return seiresModelMap;
         },
         reset: function (seriesModel, ecModel) {
             var dataAll = seriesModel.getRawData();