LI Guobao created SYSTEMML-2476:
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             Summary: Unexpected mapreduce task
                 Key: SYSTEMML-2476
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2476
             Project: SystemML
          Issue Type: Bug
            Reporter: LI Guobao


When trying to use scalar casting to get element from a list, unexpected 
mapreduce tasks are launched instead of CP mode. The scenario is to replace *C 
= 1* with *C = as.scalar(hyperparams["C"])* inside the {{_gradient function_}} 
found in {{_src/test/scripts/functions/paramserv/mnist_lenet_paramserv.dml_}}. 
And then the problem could be reproduced by launching the method 
{{_testParamservBSPBatchDisjointContiguous_}} inside class 
_{{org.apache.sysml.test.integration.functions.paramserv.ParamservLocalNNTest}}_

Here is the stack:
{code:java}
18/07/31 22:10:27 INFO mapred.MapTask: numReduceTasks: 1
18/07/31 22:10:27 INFO mapred.MapTask: (EQUATOR) 0 kvi 26214396(104857584)
18/07/31 22:10:27 INFO mapred.MapTask: mapreduce.task.io.sort.mb: 100
18/07/31 22:10:27 INFO mapred.MapTask: soft limit at 83886080
18/07/31 22:10:27 INFO mapred.MapTask: bufstart = 0; bufvoid = 104857600
18/07/31 22:10:27 INFO mapred.MapTask: kvstart = 26214396; length = 6553600
18/07/31 22:10:27 INFO mapreduce.Job: The url to track the job: 
http://localhost:8080/
18/07/31 22:10:27 INFO mapreduce.Job: Running job: job_local792652629_0008
{code}




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