[ https://issues.apache.org/jira/browse/MAPREDUCE-6397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alan Burlison reassigned MAPREDUCE-6397: ---------------------------------------- Assignee: Alan Burlison > MAPREDUCE makes many endian-dependent assumptions > ------------------------------------------------- > > Key: MAPREDUCE-6397 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-6397 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: build > Affects Versions: 2.7.0 > Environment: Any big-endian platform > Reporter: Alan Burlison > Assignee: Alan Burlison > > MAPREDUCE native code contains multiple uses of the bswap and bswap64 > assembler functions (from > hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/main/native/src/lib/primitives.h). > primitives.h contains neither a sparc implementation of bswap nor a > platform-independent C fallback implementation. In addition, byte swaps are > nearly always made without checking if the platform is big or little endian, > the assumption hard-coded throughout the source seems to be that the platform > is little-endian. This most likely means that the MAPREDUCE native is > currently code non-portable to big-endian platforms. The code needs to be > examined carefully to determine which byte swaps are correct on all platforms > and which are endian-dependent. -- This message was sent by Atlassian JIRA (v6.3.4#6332)