huangtianhua created SPARK-28519:
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Summary: Tests failed on aarch64 due the value of math.log and
power function is different
Key: SPARK-28519
URL: https://issues.apache.org/jira/browse/SPARK-28519
Project: Spark
Issue Type: Test
Components: SQL
Affects Versions: 3.0.0
Reporter: huangtianhua
Sorry to disturb again, we ran unit tests on arm64 instance, and there are
other sql tests failed:
- pgSQL/float8.sql *** FAILED ***
Expected "{color:#f691b2}0.549306144334054[9]{color}", but got
"{color:#f691b2}0.549306144334054[8]{color}" Result did not match for query #56
SELECT atanh(double('0.5')) (SQLQueryTestSuite.scala:362)
- pgSQL/numeric.sql *** FAILED ***
Expected "2 {color:#59afe1}2247902679199174[72{color}
224790267919917955.1326161858
4 7405685069595001 7405685069594999.0773399947
5 5068226527.321263 5068226527.3212726541
6 281839893606.99365 281839893606.9937234336
7 {color:#d04437}1716699575118595840{color} 1716699575118597095.4233081991
8 167361463828.0749 167361463828.0749132007
9 {color:#14892c}107511333880051856]{color} 107511333880052007....", but got
"2 {color:#59afe1}2247902679199174[40{color} 224790267919917955.1326161858
4 7405685069595001 7405685069594999.0773399947
5 5068226527.321263 5068226527.3212726541
6 281839893606.99365 281839893606.9937234336
7 {color:#d04437}1716699575118595580{color} 1716699575118597095.4233081991
8 167361463828.0749 167361463828.0749132007
9 {color:#14892c}107511333880051872]{color} 107511333880052007...." Result did
not match for query #496
SELECT t1.id1, t1.result, t2.expected
FROM num_result t1, num_exp_power_10_ln t2
WHERE t1.id1 = t2.id
AND t1.result != t2.expected (SQLQueryTestSuite.scala:362)
The first test failed, because the value of math.log(3.0) is different on
aarch64:
# on x86_64:
scala> math.log(3.0)
res50: Double = 1.0986122886681098
# on aarch64:
scala> math.log(3.0)
res19: Double = 1.0986122886681096
And I tried math.log(4.0), math.log(5.0) and they are same, I don't know why
math.log(3.0) is so special? But the result is different indeed on aarch64.
The second test failed, because some values of pow() is different on aarch64,
according to the test, I took tests on aarch64 and x86_64, take '-83028485' as
example:
# on x86_64:
scala> import java.lang.Math._
import java.lang.Math._
scala> abs(-83028485)
res3: Int = 83028485
scala> var a = -83028485
a: Int = -83028485
scala> abs(a)
res4: Int = 83028485
scala> math.log(abs(a))
res5: Double = 18.234694299654787
scala> pow(10, math.log(abs(a)))
res6: Double ={color:#d04437} 1.71669957511859584E18{color}
# on aarch64:
scala> var a = -83028485
a: Int = -83028485
scala> abs(a)
res38: Int = 83028485
scala> math.log(abs(a))
res39: Double = 18.234694299654787
scala> pow(10, math.log(abs(a)))
res40: Double = {color:#d04437}1.71669957511859558E18{color}
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