NRPE: Unable to read output problem

laghao commented 7 years ago

I installed the [ https://labs.consol.de/nagios/check_oracle_health/ | check_oracle_health ] plugin and it's working when I execute it manually so I get the output message, but when I run it using nrpe I get the following error: "NRPE: Unable to read output"

# /usr/local/nagios/libexec/check_oracle_health --connect ora12p --mode tnsping --user nagios --password nagiospass
OK - connection established to ora12p.
# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_Oracle_SID
NRPE: Unable to read output
# cat /etc/nagios/nrpe.cfg | grep check_Oracle_SID
command[check_Oracle_SID]= "export PATH=$PATH:/usr/lib/oracle/12.2/client64/bin ;  export LD_LIBRARY_PATH=/usr/lib/oracle/12.2/client64/lib ; export ORACLE_HOME=/usr/lib/oracle/12.2/client64 ; export TNS_ADMIN=/opt/oracle/product/ora12p/network/admin /usr/local/nagios/libexec/check_oracle_health --connect ora12p --mode tnsping --user nagios --password nagiospass"

Any ideas about the NRPE: Unable to read output problem ?

lausser commented 7 years ago

No idea. You need to trace the nrpe daemon with strace and see which command it actually executes.

laghao commented 7 years ago

Hi there here's the strace output, are you able to help me digging into this problem?

[root@monitoring ~]# /usr/lib64/nagios/plugins/check_nrpe -H 10.9.80.21 -c check_load
OK - load average: 0.00, 0.05, 0.07|load1=0.000;15.000;30.000;0; load5=0.050;10.000;25.000;0; load15=0.070;5.000;20.000;0;
[root@monitoring~]# /usr/lib64/nagios/plugins/check_nrpe -H 10.9.80.21 -c check_Oracle_tablespaces
NRPE: Unable to read output
[root@monitoring ~]# strace /usr/lib64/nagios/plugins/check_nrpe -H 10.9.80.21 -c check_Oracle_tablespaces
execve("/usr/lib64/nagios/plugins/check_nrpe", ["/usr/lib64/nagios/plugins/check_"..., "-H", "10.9.80.21", "-c", "check_Oracle_tablespaces"], [/* 22 vars */]) = 0
brk(0)                                  = 0x17d2000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c290000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=33601, ...}) = 0
mmap(NULL, 33601, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fac6c287000
close(3)                                = 0
open("/lib64/libssl.so.10", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\205\1\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=454024, ...}) = 0
mmap(NULL, 2544944, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6be04000
mprotect(0x7fac6be68000, 2093056, PROT_NONE) = 0
mmap(0x7fac6c067000, 45056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x63000) = 0x7fac6c067000
close(3)                                = 0
open("/lib64/libcrypto.so.10", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\204\6\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2025472, ...}) = 0
mmap(NULL, 4104152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6ba1a000
mprotect(0x7fac6bbda000, 2097152, PROT_NONE) = 0
mmap(0x7fac6bdda000, 155648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7fac6bdda000
mmap(0x7fac6be00000, 16344, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac6be00000
close(3)                                = 0
open("/lib64/libnsl.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240@\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=113584, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c286000
mmap(NULL, 2198200, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6b801000
mprotect(0x7fac6b817000, 2093056, PROT_NONE) = 0
mmap(0x7fac6ba16000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7fac6ba16000
mmap(0x7fac6ba18000, 6840, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac6ba18000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2118128, ...}) = 0
mmap(NULL, 3932672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6b440000
mprotect(0x7fac6b5f6000, 2097152, PROT_NONE) = 0
mmap(0x7fac6b7f6000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b6000) = 0x7fac6b7f6000
mmap(0x7fac6b7fc000, 16896, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac6b7fc000
close(3)                                = 0
open("/lib64/libgssapi_krb5.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\306\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=324888, ...}) = 0
mmap(NULL, 2414784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6b1f2000
mprotect(0x7fac6b23d000, 2097152, PROT_NONE) = 0
mmap(0x7fac6b43d000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4b000) = 0x7fac6b43d000
close(3)                                = 0
open("/lib64/libkrb5.so.3", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240U\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=959008, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c285000
mmap(NULL, 3041536, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6af0b000
mprotect(0x7fac6afe1000, 2097152, PROT_NONE) = 0
mmap(0x7fac6b1e1000, 69632, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xd6000) = 0x7fac6b1e1000
close(3)                                = 0
open("/lib64/libcom_err.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p\25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=15848, ...}) = 0
mmap(NULL, 2109928, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6ad07000
mprotect(0x7fac6ad0a000, 2093056, PROT_NONE) = 0
mmap(0x7fac6af09000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fac6af09000
close(3)                                = 0
open("/lib64/libk5crypto.so.3", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0pF\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=202568, ...}) = 0
mmap(NULL, 2298328, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6aad5000
mprotect(0x7fac6ab04000, 2093056, PROT_NONE) = 0
mmap(0x7fac6ad03000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2e000) = 0x7fac6ad03000
mmap(0x7fac6ad06000, 472, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac6ad06000
close(3)                                = 0
open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19776, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c284000
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6a8d1000
mprotect(0x7fac6a8d3000, 2097152, PROT_NONE) = 0
mmap(0x7fac6aad3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fac6aad3000
close(3)                                = 0
open("/lib64/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p!\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=90664, ...}) = 0
mmap(NULL, 2183688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6a6bb000
mprotect(0x7fac6a6d0000, 2093056, PROT_NONE) = 0
mmap(0x7fac6a8cf000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7fac6a8cf000
close(3)                                = 0
open("/lib64/libkrb5support.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3406\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=62744, ...}) = 0
mmap(NULL, 2156136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6a4ac000
mprotect(0x7fac6a4b9000, 2097152, PROT_NONE) = 0
mmap(0x7fac6a6b9000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xd000) = 0x7fac6a6b9000
close(3)                                = 0
open("/lib64/libkeyutils.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=15688, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c283000
mmap(NULL, 2109720, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6a2a8000
mprotect(0x7fac6a2ab000, 2093056, PROT_NONE) = 0
mmap(0x7fac6a4aa000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fac6a4aa000
close(3)                                = 0
open("/lib64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3209\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=111080, ...}) = 0
mmap(NULL, 2202264, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac6a08e000
mprotect(0x7fac6a0a4000, 2097152, PROT_NONE) = 0
mmap(0x7fac6a2a4000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7fac6a2a4000
mmap(0x7fac6a2a6000, 6808, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac6a2a6000
close(3)                                = 0
open("/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240l\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=143944, ...}) = 0
mmap(NULL, 2208864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac69e72000
mprotect(0x7fac69e89000, 2093056, PROT_NONE) = 0
mmap(0x7fac6a088000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7fac6a088000
mmap(0x7fac6a08a000, 13408, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac6a08a000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c282000
open("/lib64/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300j\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=155744, ...}) = 0
mmap(NULL, 2255216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac69c4b000
mprotect(0x7fac69c6f000, 2093056, PROT_NONE) = 0
mmap(0x7fac69e6e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x23000) = 0x7fac69e6e000
mmap(0x7fac69e70000, 6512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fac69e70000
close(3)                                = 0
open("/lib64/libpcre.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\25\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=398264, ...}) = 0
mmap(NULL, 2490888, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fac699ea000
mprotect(0x7fac69a4a000, 2093056, PROT_NONE) = 0
mmap(0x7fac69c49000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5f000) = 0x7fac69c49000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c281000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c280000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c27e000
arch_prctl(ARCH_SET_FS, 0x7fac6c27e840) = 0
mprotect(0x7fac6b7f6000, 16384, PROT_READ) = 0
mprotect(0x7fac6a088000, 4096, PROT_READ) = 0
mprotect(0x7fac69c49000, 4096, PROT_READ) = 0
mprotect(0x7fac6aad3000, 4096, PROT_READ) = 0
mprotect(0x7fac69e6e000, 4096, PROT_READ) = 0
mprotect(0x7fac6a2a4000, 4096, PROT_READ) = 0
mprotect(0x7fac6a4aa000, 4096, PROT_READ) = 0
mprotect(0x7fac6a6b9000, 4096, PROT_READ) = 0
mprotect(0x7fac6a8cf000, 4096, PROT_READ) = 0
mprotect(0x7fac6ad03000, 8192, PROT_READ) = 0
mprotect(0x7fac6af09000, 4096, PROT_READ) = 0
mprotect(0x7fac6b1e1000, 57344, PROT_READ) = 0
mprotect(0x7fac6b43d000, 4096, PROT_READ) = 0
mprotect(0x7fac6ba16000, 4096, PROT_READ) = 0
mprotect(0x7fac6bdda000, 106496, PROT_READ) = 0
mprotect(0x7fac6c067000, 16384, PROT_READ) = 0
mprotect(0x604000, 4096, PROT_READ)     = 0
mprotect(0x7fac6c291000, 4096, PROT_READ) = 0
munmap(0x7fac6c287000, 33601)           = 0
set_tid_address(0x7fac6c27eb10)         = 13763
set_robust_list(0x7fac6c27eb20, 24)     = 0
rt_sigaction(SIGRTMIN, {0x7fac69e78780, [], SA_RESTORER|SA_SIGINFO, 0x7fac69e81370}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7fac69e78810, [], SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x7fac69e81370}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
statfs("/sys/fs/selinux", 0x7fffad25fdf0) = -1 ENOENT (No such file or directory)
statfs("/selinux", 0x7fffad25fdf0)      = -1 ENOENT (No such file or directory)
brk(0)                                  = 0x17d2000
brk(0x17f3000)                          = 0x17f3000
open("/proc/filesystems", O_RDONLY)     = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c28f000
read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 294
stat("/etc/sysconfig/64bit_strstr_via_64bit_strstr_sse2_unaligned", 0x7fffad25fcd0) = -1 ENOENT (No such file or directory)
read(3, "", 1024)                       = 0
close(3)                                = 0
munmap(0x7fac6c28f000, 4096)            = 0
access("/etc/selinux/config", F_OK)     = 0
access("/etc/system-fips", F_OK)        = -1 ENOENT (No such file or directory)
open("/dev/urandom", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 3
fstat(3, {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9), ...}) = 0
poll([{fd=3, events=POLLIN}], 1, 10)    = 1 ([{fd=3, revents=POLLIN}])
read(3, "\25\367\2659\4\272\324\217\20`o%B\371\316\2351\17\364\263\266\376\251\253\331Y\26\250\231\6*\33"..., 48) = 48
close(3)                                = 0
getuid()                                = 0
rt_sigaction(SIGALRM, {0x401fb0, [ALRM], SA_RESTORER|SA_RESTART, 0x7fac6b475250}, {SIG_DFL, [], 0}, 8) = 0
alarm(10)                               = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3
connect(3, {sa_family=AF_INET, sin_port=htons(5666), sin_addr=inet_addr("10.9.80.21")}, 16) = 0
brk(0)                                  = 0x17f3000
brk(0x1814000)                          = 0x1814000
write(3, "\26\3\1\0x\1\0\0t\3\3Y>^\230;\325\267\343qS\322\r5s\300\205\246aFvH"..., 125) = 125
read(3, "\26\3\3\0:\2\0", 7)            = 7
read(3, "\0006\3\3Y>^\230d\25y\332\350\271:\221\217J\331\371\271\365<B}h\335v\354\314\274V"..., 56) = 56
read(3, "\26\3\3\0\213", 5)             = 5
read(3, "\f\0\0\207\0@\345f|\200\241\327q\226\377\210\340\314\202(K\250A\23\365g\351g\2:\263\242"..., 139) = 139
read(3, "\26\3\3\0\4", 5)               = 5
read(3, "\16\0\0\0", 4)                 = 4
write(3, "\26\3\3\0F\20\0\0B\0@\207Q'\272\223\23\225\276lsv\302C8\4}\272{\ta\326"..., 126) = 126
read(3, "\26\3\3\0\252", 5)             = 5
read(3, "\4\0\0\246\0\0\1,\0\240\20\350D\373g\237\251\255\273\373TP\r;\224\33\262p\367aj\f"..., 170) = 170
read(3, "\24\3\3\0\1", 5)               = 5
read(3, "\1", 1)                        = 1
read(3, "\26\3\3\0(", 5)                = 5
read(3, "\237hpa\367\177\244\254\371I\304\32\300O\213o2\372*\335'\7\200\261\316\261\177Y\226\213\336\213"..., 40) = 40
open("/dev/urandom", O_RDONLY)          = 4
fstat(4, {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9), ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7fffad25f450) = -1 EINVAL (Invalid argument)
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c28f000
read(4, "\302e]\364\216\\\203\363\177\1\355\206\v7z\322\233Q\363*\252?L\231\5J\\\260*\221*\373"..., 4096) = 4096
close(4)                                = 0
munmap(0x7fac6c28f000, 4096)            = 0
write(3, "\27\3\3\4$\332.]Fa\266\34\3668\210t\335\24\265\4jk\277b\231\274\342\243)?\305."..., 1065) = 1065
read(3, "\27\3\3\4$", 5)                = 5
read(3, "\237hpa\367\177\244\255F\221\223\237\311\6\2\332\217\231\364\304\4\256\376\325|\361\374K&\346B\340"..., 1060) = 1060
alarm(0)                                = 10
write(3, "\25\3\3\0\32\332.]Fa\266\34\367\275@\236\346`N\245\6j\3[\203\t\23(\337\302\351", 31) = 31
shutdown(3, SHUT_WR)                    = 0
select(4, [3], NULL, NULL, {1, 0})      = 1 (in [3], left {0, 999999})
recvfrom(3, "\25\3\3\0\32\237hpa\367\177\244\256g\244b\232Y\225hr\177\262\\\343\33\314\210\216\306\315", 1000, 0, NULL, NULL) = 31
select(4, [3], NULL, NULL, {1, 0})      = 1 (in [3], left {0, 999999})
recvfrom(3, "", 1000, 0, NULL, NULL)    = 0
close(3)                                = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 8), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fac6c28f000
write(1, "NRPE: Unable to read output\n", 28NRPE: Unable to read output
) = 28
exit_group(3)                           = ?
+++ exited with 3 +++

lausser commented 7 years ago

That was an strace of check_nrpe. You need to strace the nrpe daemon on the database server.

sdouce commented 7 years ago

Try This depending your starting nrpe daemon

Add your environment variable in /etc/init.d/nrpe script or in /etc/xinet.d/nrpe

laghao commented 7 years ago

Thanks for the feedback, actually setting up the environment in a wrapper did fix the problem, and a question for @sdouce did you find out this from strace ? if so how ? :)

sdouce commented 7 years ago

Sorry i find it with an long experience troubleshooting NRPE .... I did'nt read your strace result . ;-) If you need to use DB2 plugins this will be the same resolution . Cheers !!!

lausser / check_oracle_health

NRPE: Unable to read output problem #18