[HADOOP-10962] Flags for posix_fadvise are not valid in some architectures

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 2.6.0
• Component/s: native

Environment

System z/Linux

• Target Version/s: 2.6.0
• Assignee: David Villegas
• Reporter: David Villegas
• Created: 12/Aug/14 19:51
• Updated: 01/Dec/14 03:09
• Resolved: 12/Aug/14 23:03

Description

In org.apache.hadoop.io.nativeio.NativeIO.java, the posix_fadvise flag parameter is hardcoded to the most common values in fcntl.h.

However, not all architectures use the same values (in this case, System z/Linux) A better approach would be to not make assumptions about fcntl.h values (or any other system constants).

This bug results in calls to posix_fadvise failing in zLinux.

Issue Links

• breaks: HADOOP-10966 Hadoop Common native compilation broken in windows