我有几台CentOS 6服务器，同步到pool.ntp.org时间服务器。 但有时它们上的时间不同步，这会产生20-30秒的差异，这会导致我的应用程序出错。
这可能是什么原因，我应该在哪里寻找它？
配置
tinker panic 1000 allan 1500 dispersion 15 step 0.128 stepout 900
statsdir /var/log/ntpstats/
leapfile /etc/ntp.leapseconds
driftfile /var/lib/ntp/ntp.drift
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable
disable monitor
server 0.pool.ntp.org iburst minpoll 6 maxpoll 10
restrict 0.pool.ntp.org nomodify notrap noquery
server 1.pool.ntp.org iburst minpoll 6 maxpoll 10
restrict 1.pool.ntp.org nomodify notrap noquery
server 2.pool.ntp.org iburst minpoll 6 maxpoll 10
restrict 2.pool.ntp.org nomodify notrap noquery
server 3.pool.ntp.org iburst minpoll 6 maxpoll 10
restrict 3.pool.ntp.org nomodify notrap noquery
restrict default kod notrap nomodify nopeer noquery
restrict 127.0.0.1 nomodify
restrict -6 default kod notrap nomodify nopeer noquery
restrict -6 ::1 nomodify
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
SRV1
remote refid st t when poll reach delay offset jitter
==============================================================================
server01.coloce .STEP. 16 u 11d 1024 0 0.000 0.000 0.000
+mt4.raqxs.net 193.190.230.66 2 u 510 1024 377 6.367 5.984 7.433
+16-164-ftth.ons 193.79.237.14 2 u 217 1024 375 11.339 -0.028 4.564
*services.freshd 213.136.0.252 2 u 419 1024 377 6.735 2.048 4.321
LOCAL(0) .LOCL. 10 l - 64 0 0.000 0.000 0.000
srv2
remote refid st t when poll reach delay offset jitter
==============================================================================
+ntp2.edutel.nl 80.94.65.10 2 u 527 1024 377 11.924 1.469 0.753
-95.211.224.12 193.67.79.202 2 u 364 1024 377 12.989 4.930 0.628
+app.kingsquare. 193.79.237.14 2 u 339 1024 377 5.485 0.493 0.591
*ntp.bserved.nl 193.67.79.202 2 u 206 1024 377 7.007 0.539 0.420
LOCAL(0) .LOCL. 10 l - 64 0 0.000 0.000 0.000