Ilya Maykov created HADOOP-10358:
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Summary: libhadoop doesn't compile on Mac OS X
Key: HADOOP-10358
URL: https://issues.apache.org/jira/browse/HADOOP-10358
Project: Hadoop Common
Issue Type: Improvement
Components: native
Environment: Mac OS X 10.8.5
Oracle JDK 1.7.0_51
Reporter: Ilya Maykov
Priority: Minor
The native component of hadoop-common (libhadoop.so on linux, libhadoop.dylib
on mac) fails to compile on Mac OS X. The problem is in
hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c
at lines 76-78:
[exec]
/Users/ilyam/src/github/apache/hadoop-common/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c:77:26:
error: invalid operands to binary expression ('void' and 'int')
[exec] if(setnetgrent(cgroup) == 1) {
[exec] ~~~~~~~~~~~~~~~~~~~ ^ ~
There are two problems in the code:
1) The #ifndef guard only checks for __FreeBSD__ but should check for either
one of __FreeBSD__ or __APPLE__. This is because Mac OS X inherits its syscalls
from FreeBSD rather than Linux, and thus the setnetgrent() syscall returns void.
2) setnetgrentCalledFlag = 1 is called outside the #ifndef guard, but the
syscall is only called inside the guard. This means that on FreeBSD,
endnetgrent() can be called in the cleanup code without a corresponding
setnetgrent() invocation.
I have a patch that fixes both issues (will attach in a bit). With this patch,
I'm able to compile libhadoop.dylib on Mac OS X, which in turn lets me install
native snappy, lzo, etc compressor libraries on my client. That lets me run
commands like 'hadoop fs -text somefile.lzo' from the macbook rather than
having to ssh to a linux box, etc.
Note that this patch only fixes the native build of hadoop-common-project. Some
other components of hadoop still fail to build their native components, but
libhadoop.dylib is enough for the client.
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