Hello,guys. help!!! 
My cluster includes 4 virtual machines(ambari, master, slave1, slave2) which 
are equipped with : the operating system 'Centos7.2-1511', memory of 4G, and 
processor 'AMD FX-8350' for each one.
I've installed HAWQ using Ambari as follows : 
- ambari : ambari-server, mysql;
- master : HDFS namenode, HDFS datanode, hawq-master, hawq-segment;
- slave1 : HDFS datanode, hawq-standby, hawq-segment;
- slave2 : HDFS datanode, hawq-segment.
After installation, the service hawq-standby could not be started. The error 
log is as follows :
192.168.86.101 50612 2016-06-30 17:12:51 CST 0 seg-10000 
FATAL XX000 semctl(37093455, 11, SETVAL, 0) failed: Invalid argument 
(pg_sema.c:154) 
0 pg_sema.c 
154 "Stack trace:
1    0x87448a postgres errstart + 0x22a
2    0x74bb3c postgres <symbol not found> + 0x74bb3c
3    0x7a129f postgres InitProcess + 0x33f
4    0x7affdd postgres PostgresMain + 0x8ad
5    0x763c43 postgres <symbol not found> + 0x763c43
6    0x76439d postgres <symbol not found> + 0x76439d
7    0x7661ce postgres PostmasterMain + 0xc7e
8    0x6c02da postgres main + 0x48a
9    0x7f7ed3881b15 libc.so.6 __libc_start_main + 0xf5
10   0x4a1709 postgres <symbol not found> + 0x4a1709

For more info : i've tried to do the same installation in another cluster. All 
the equipement is the same, except that the processor is Inter i5-4590. In this 
situation, all the service could be started without any problem after 
installation.

Do you have any idea ?
Thank you in advance.


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