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From Jörg Prante (Created) (JIRA) <j...@apache.org>
Subject [jira] [Created] (MATH-721) building common-math on Solaris SPARC gives "error: floating point number too small"
Date Thu, 08 Dec 2011 23:51:40 GMT
building common-math on Solaris SPARC gives "error: floating point number too small"
------------------------------------------------------------------------------------

                 Key: MATH-721
                 URL: https://issues.apache.org/jira/browse/MATH-721
             Project: Commons Math
          Issue Type: Bug
    Affects Versions: 2.2
         Environment: Build environment is:
mvn --version
Apache Maven 3.0.3 (rNON-CANONICAL_2011-10-13_22-23_builder; 2011-10-13 22:23:49+0200)
Maven home: /usr/local/share/maven-3.0.3
Java version: 1.7.0-internal, vendor: Oracle Corporation
Java home: /usr/local/share/jdk1.7.0_1/jre
Default locale: de_DE, platform encoding: UTF-8
OS name: "sunos", version: "5.10", arch: "sparc", family: "unix"
            Reporter: Jörg Prante


It seems the assumption in MathUtils.java 


    /** Safe minimum, such that 1 / SAFE_MIN does not overflow.
     * <p>In IEEE 754 arithmetic, this is also the smallest normalized
     * number 2<sup>-1022</sup>.</p>
     */
    public static final double SAFE_MIN = 0x1.0p-1022;

does not work on my openjdk 1.7.0_1 on Solaris SPARC, because I get the following build error:

[INFO] Compiling 457 source files to /opt/builder/projects/commons-math-2.2-src/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/main/java/org/apache/commons/math/util/MathUtils.java:[42,42]
error: floating point number too small

[INFO] 1error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE

and also in the tests I encounter the error when parsing floating point constants

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.1:testCompile
(default-testCompile) on project commons-math: Compilation failure: Compilation failure:
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1050,69]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1055,28]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1055,69]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1056,28]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1062,70]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1063,70]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1068,70]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/util/FastMathTest.java:[1069,70]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/optimization/general/LevenbergMarquardtOptimizerTest.java:[503,51]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/optimization/general/LevenbergMarquardtOptimizerTest.java:[503,66]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/estimation/LevenbergMarquardtEstimatorTest.java:[583,52]
error: floating point number too small
[ERROR] 
[ERROR] /opt/builder/projects/commons-math-2.2-src/src/test/java/org/apache/commons/math/estimation/LevenbergMarquardtEstimatorTest.java:[585,52]
error: floating point number too small


I suggest using java.lang.Double.MIN_NORMAL for a platform normalized minimal floating point
value.


A quick program for printing Double.MIN_NORMAL gives the following result.

class test {
   public static void main(String[] args) {
       System.out.println("min float = " + Double.MIN_NORMAL );
   }
}

java test
min float = 2.2250738585072014E-308

Could it be an openjdk glitch? Thank you for any comments and help how this could be fixed.


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