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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SYSTEMML-1621) `max(0, X)` fails with type mismatch
Date Wed, 24 May 2017 06:05:04 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm resolved SYSTEMML-1621.
--------------------------------------
    Resolution: Fixed

> `max(0, X)` fails with type mismatch
> ------------------------------------
>
>                 Key: SYSTEMML-1621
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1621
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Mike Dusenberry
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.0
>
>
> Scenario: Compute the element-wise max of a matrix {{X}} and {{0}}.
> Current behavior: {{max(0, X)}} fails, {{max(0.0, X)}} works, and {{max(X, 0)}} works
as well.
> Desired behavior: {{max(0, X)}} should work.
> How to reproduce: {{nn/layers/relu.dml::forward}} currently contains a {{max(X, 0)}}
function call.  When the tests ({{test/integration/scripts/nn/NNTest.java}}) are run, everything
works fine.  However, if this function is adjusted to be {{max(0, X)}}, the tests will fail
during parsing with the following error:
> {code}
> 17/05/23 11:17:00 ERROR parser.StatementBlock: ERROR: ./nn/test/grad_check.dml -- line
1729, column 2 -- for function two_layer_affine_l2_net_forward, return variable aout value
type of INT does not match value type in function signature of DOUBLE and cannot safely cast
double as int
> 17/05/23 11:17:00 ERROR api.DMLScript: Failed to execute DML script.
> org.apache.sysml.parser.LanguageException: ERROR: ./nn/test/grad_check.dml -- line 1729,
column 2 -- for function two_layer_affine_l2_net_forward, return variable aout value type
of INT does not match value type in function signature of DOUBLE and cannot safely cast INT
as DOUBLE
>         at org.apache.sysml.parser.FunctionStatementBlock.validate(FunctionStatementBlock.java:155)
>         at org.apache.sysml.parser.DMLTranslator.validateParseTree(DMLTranslator.java:133)
>         at org.apache.sysml.api.DMLScript.execute(DMLScript.java:758)
>         at org.apache.sysml.api.DMLScript.executeScript(DMLScript.java:506)
>         at org.apache.sysml.api.DMLScript.main(DMLScript.java:233)
> Exception in thread "main" org.apache.sysml.api.DMLException: org.apache.sysml.parser.LanguageException:
ERROR: ./nn/test/grad_check.dml -- line 1729, column 2 -- for function two_layer_affine_l2_net_forward,
return variable aout value type of INT does not match value type in function signature of
DOUBLE and cannot safely cast INT as DOUBLE
>         at org.apache.sysml.api.DMLScript.executeScript(DMLScript.java:533)
>         at org.apache.sysml.api.DMLScript.main(DMLScript.java:233)
> Caused by: org.apache.sysml.parser.LanguageException: ERROR: ./nn/test/grad_check.dml
-- line 1729, column 2 -- for function two_layer_affine_l2_net_forward, return variable aout
value type of INT does not match value type in function signature of DOUBLE and cannot safely
cast INT as DOUBLE
>         at org.apache.sysml.parser.FunctionStatementBlock.validate(FunctionStatementBlock.java:155)
>         at org.apache.sysml.parser.DMLTranslator.validateParseTree(DMLTranslator.java:133)
>         at org.apache.sysml.api.DMLScript.execute(DMLScript.java:758)
>         at org.apache.sysml.api.DMLScript.executeScript(DMLScript.java:506)
>         ... 1 more
> Failed to run SystemML. Exit code :256
> {code}



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