Help me! Why did the salve stop suddenly ?

Hi, dear pgsql-hackers

*1. environment*

*DB Master*

$ cat /etc/issue
CentOS release 6.5 (Final)
Kernel \r on an \m

$ uname -av
Linux l-xxxxx1.xx.cnx 3.14.29-3.centos6.x86_64 #1 SMP Tue Jan 20 17:48:32
CST 2015 x86_64 x86_64 x86_64 GNU/Linux

$ psql -U postgres
psql (9.3.5)
Type "help" for help.

postgres=# select version();

version
--------------------------------------------------------------------------------------------------------------
PostgreSQL 9.3.5 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.7
20120313 (Red Hat 4.4.7-3), 64-bit
(1 row)

$ pg_config
BINDIR = /opt/pg93/bin
DOCDIR = /opt/pg93/share/doc/postgresql
HTMLDIR = /opt/pg93/share/doc/postgresql
INCLUDEDIR = /opt/pg93/include
PKGINCLUDEDIR = /opt/pg93/include/postgresql
INCLUDEDIR-SERVER = /opt/pg93/include/postgresql/server
LIBDIR = /opt/pg93/lib
PKGLIBDIR = /opt/pg93/lib/postgresql
LOCALEDIR = /opt/pg93/share/locale
MANDIR = /opt/pg93/share/man
SHAREDIR = /opt/pg93/share/postgresql
SYSCONFDIR = /opt/pg93/etc/postgresql
PGXS = /opt/pg93/lib/postgresql/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--prefix=/opt/pg93' '--with-perl' '--with-libxml'
'--with-libxslt' '--with-ossp-uuid' 'CFLAGS= -march=core2 -O2 '
CC = gcc
CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
CFLAGS = -march=core2 -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute
-Wformat-security -fno-strict-aliasing -fwrapv
CFLAGS_SL = -fpic
LDFLAGS = -L../../../src/common -Wl,--as-needed
-Wl,-rpath,'/opt/pg93/lib',--enable-new-dtags
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgport -lpgcommon -lxslt -lxml2 -lz -lreadline -lcrypt -ldl -lm
VERSION = PostgreSQL 9.3.5

*DB Slave*$ cat /etc/issue
CentOS release 6.5 (Final)
Kernel \r on an \m

$ uname -av
Linux l-xxxx2.xx.cnx 3.14.31-3.centos6.x86_64 #1 SMP Mon Feb 2 15:26:04 CST
2015 x86_64 x86_64 x86_64 GNU/Linux

$ psql -U postgres
psql (9.3.5)
Type "help" for help.

postgres=# select version();

version
--------------------------------------------------------------------------------------------------------------
PostgreSQL 9.3.5 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.7
20120313 (Red Hat 4.4.7-3), 64-bit
(1 row)

postgres=# show log_line_prefix ;
log_line_prefix
------------------------------
[%u %d %a %h %m %p %c %l %x]
(1 row)

$ pg_config
BINDIR = /opt/pg93/bin
DOCDIR = /opt/pg93/share/doc/postgresql
HTMLDIR = /opt/pg93/share/doc/postgresql
INCLUDEDIR = /opt/pg93/include
PKGINCLUDEDIR = /opt/pg93/include/postgresql
INCLUDEDIR-SERVER = /opt/pg93/include/postgresql/server
LIBDIR = /opt/pg93/lib
PKGLIBDIR = /opt/pg93/lib/postgresql
LOCALEDIR = /opt/pg93/share/locale
MANDIR = /opt/pg93/share/man
SHAREDIR = /opt/pg93/share/postgresql
SYSCONFDIR = /opt/pg93/etc/postgresql
PGXS = /opt/pg93/lib/postgresql/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--prefix=/opt/pg93' '--with-perl' '--with-libxml'
'--with-libxslt' '--with-ossp-uuid' 'CFLAGS= -march=core2 -O2 '
CC = gcc
CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
CFLAGS = -march=core2 -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute
-Wformat-security -fno-strict-aliasing -fwrapv
CFLAGS_SL = -fpic
LDFLAGS = -L../../../src/common -Wl,--as-needed
-Wl,-rpath,'/opt/pg93/lib',--enable-new-dtags
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgport -lpgcommon -lxslt -lxml2 -lz -lreadline -lcrypt -ldl -lm
VERSION = PostgreSQL 9.3.5

2.

*the DB log in the Slave's log_directory*[ 2015-02-05 15:38:51.406
CST 2328 54d08abc.918 6 0]WARNING: will not overwrite a used ItemId
[ 2015-02-05 15:38:51.406 CST 2328 54d08abc.918 7 0]CONTEXT: xlog
redo insert: rel 38171461/16384/57220350; tid 1778398/9
[ 2015-02-05 15:38:51.406 CST 2328 54d08abc.918 8 0]PANIC:
heap_insert_redo: failed to add tuple
[ 2015-02-05 15:38:51.406 CST 2328 54d08abc.918 9 0]CONTEXT: xlog
redo insert: rel 38171461/16384/57220350; tid 1778398/9
[ 2015-02-05 15:38:51.765 CST 2320 54d08abb.910 6 0]LOG: startup
process (PID 2328) was terminated by signal 6: Aborted
[ 2015-02-05 15:38:51.765 CST 2320 54d08abb.910 7 0]LOG:
terminating any other active server processes
[DBusesr DBname [unknown] 192.168.xxx.x 2015-02-05 15:38:51.765 CST
61450 54d31d48.f00a 3 0]WARNING: terminating connection because of
crash of another server process
[DBusesr DBname [unknown] 192.168.xxx.x 2015-02-05 15:38:51.765 CST
61450 54d31d48.f00a 4 0]DETAIL: The postmaster has commanded this
server process to roll back the current transaction and exit, because
another server process exited abnormally and possibly corrupted shared
memory.
[DBusesr DBname [unknown] 192.168.xxx.x 2015-02-05 15:38:51.765 CST
61450 54d31d48.f00a 5 0]HINT: In a moment you should be able to
reconnect to the database and repeat your command.
[DBusesr DBname [unknown] 192.168.xxx.x 2015-02-05 15:38:51.765 CST
51208 54d315b6.c808 7 0]WARNING: terminating connection because of
crash of another server process
[DBusesr DBname [unknown] 192.168.xxx.x 2015-02-05 15:38:51.765 CST
51208 54d315b6.c808 8 0]DETAIL: The postmaster has commanded this
server process to roll back the current transaction and exit, because
another server process exited abnormally and possibly corrupted shared
memory.
[DBusesr DBname [unknown] 192.168.xxx.x 2015-02-05 15:38:51.765 CST
51208 54d315b6.c808 9 0]HINT: In a moment you should be able to
reconnect to the database and repeat your command.

The salve was running, but stopped suddenly , and I never start it !

Please tell me why and how to avoid it?

If you need some more detailed information, please tell me and I'll
give it to you.

Thanks

Best Regards!