Github user kiszk commented on the issue:
https://github.com/apache/spark/pull/18042
It is due to differences among CPU architectures. Here are original outputs
of `/proc/info`
It is used to identify CPU architecture and its model.
**POWER**
```
> cat /proc/cpuinfo
processor : 0
cpu : POWER8E (raw), altivec supported
clock : 3690.000000MHz
revision : 2.1 (pvr 004b 0201)
processor : 1
cpu : POWER8E (raw), altivec supported
clock : 3690.000000MHz
revision : 2.1 (pvr 004b 0201)
processor : 2
cpu : POWER8E (raw), altivec supported
clock : 3690.000000MHz
revision : 2.1 (pvr 004b 0201)
...
processor : 158
cpu : POWER8E (raw), altivec supported
clock : 3690.000000MHz
revision : 2.1 (pvr 004b 0201)
processor : 159
cpu : POWER8E (raw), altivec supported
clock : 3690.000000MHz
revision : 2.1 (pvr 004b 0201)
timebase : 512000000
platform : PowerNV
model : 8247-42L
machine : PowerNV 8247-42L
firmware : OPAL v3
```
**S390**
```
> cat /proc/cpuinfo
vendor_id : IBM/S390
# processors : 32
bogomips per cpu: 20325.00
features : esan3 zarch stfle msa ldisp eimm dfp edat etf3eh highgprs te
vx
cache0 : level=1 type=Data scope=Private size=128K line_size=256
associativity=8
cache1 : level=1 type=Instruction scope=Private size=96K
line_size=256 associativity=6
cache2 : level=2 type=Data scope=Private size=2048K line_size=256
associativity=8
cache3 : level=2 type=Instruction scope=Private size=2048K
line_size=256 associativity=8
cache4 : level=3 type=Unified scope=Shared size=65536K
line_size=256 associativity=16
cache5 : level=4 type=Unified scope=Shared size=491520K
line_size=256 associativity=30
processor 0: version = 00, identification = 01AFF7, machine = 2964
processor 1: version = 00, identification = 01AFF7, machine = 2964
processor 2: version = 00, identification = 01AFF7, machine = 2964
processor 3: version = 00, identification = 01AFF7, machine = 2964
processor 4: version = 00, identification = 01AFF7, machine = 2964
processor 5: version = 00, identification = 01AFF7, machine = 2964
processor 6: version = 00, identification = 01AFF7, machine = 2964
processor 7: version = 00, identification = 01AFF7, machine = 2964
processor 8: version = 00, identification = 01AFF7, machine = 2964
processor 9: version = 00, identification = 01AFF7, machine = 2964
processor 10: version = 00, identification = 01AFF7, machine = 2964
processor 11: version = 00, identification = 01AFF7, machine = 2964
processor 12: version = 00, identification = 01AFF7, machine = 2964
processor 13: version = 00, identification = 01AFF7, machine = 2964
processor 14: version = 00, identification = 01AFF7, machine = 2964
processor 15: version = 00, identification = 01AFF7, machine = 2964
processor 16: version = 00, identification = 01AFF7, machine = 2964
processor 17: version = 00, identification = 01AFF7, machine = 2964
processor 18: version = 00, identification = 01AFF7, machine = 2964
processor 19: version = 00, identification = 01AFF7, machine = 2964
processor 20: version = 00, identification = 01AFF7, machine = 2964
processor 21: version = 00, identification = 01AFF7, machine = 2964
processor 22: version = 00, identification = 01AFF7, machine = 2964
processor 23: version = 00, identification = 01AFF7, machine = 2964
processor 24: version = 00, identification = 01AFF7, machine = 2964
processor 25: version = 00, identification = 01AFF7, machine = 2964
processor 26: version = 00, identification = 01AFF7, machine = 2964
processor 27: version = 00, identification = 01AFF7, machine = 2964
processor 28: version = 00, identification = 01AFF7, machine = 2964
processor 29: version = 00, identification = 01AFF7, machine = 2964
processor 30: version = 00, identification = 01AFF7, machine = 2964
processor 31: version = 00, identification = 01AFF7, machine = 2964
```
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