[YARN-1519] check if sysconf is implemented before using it

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0, 3.0.0-alpha1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: nodemanager
• Labels: BB2015-05-TBR
• Assignee: Radim Kolar
• Reporter: Radim Kolar
• Created: 19/Dec/13 01:10
• Updated: 30/Aug/16 01:31
• Resolved: 14/May/15 22:57

Description

If sysconf value _SC_GETPW_R_SIZE_MAX is not implemented, it leads to segfault because invalid pointer gets passed to libc function.

fix: enforce minimum value 1024, same method is used in hadoop-common native code.