Project Scene：

Environment centos7.9

Problem description

Set a server as ntp server. The other is the client. Found an error. no server suitable for synchrnization found

Use: ntpdate -d 10.143.33.50

View the error

xxx.xxx.xxx.xxx: Server dropped: no data

Appears again during debugging

xxx.xxx.xxx.xxx: server dropped: strata too high

Cause Analysis：

1. Keepalived was originally installed on the server. I thought it was because of this effect. After closing it, the problem is still there.

2,–check from the server side
[root@timeserver ~]# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
210.72.145.44 .ACTS. 1 u 971 8 0 0.000 0.000 0.000
202.120.2.101 .INIT. 10 u 8 64 377 0.000 0.000 0.000

Viewing is normal.

3, there may be network reasons

4. From the data, it is also related to conf. configuration ， configuration such as restrict

Solution：

1. Make sure port 123 is connected

2. Modify the server configuration （202.120.2.101 This is the synchronization server）

vim /etc/ntp.conf

restrict default nomodify notrap noquery
restrict 127.0.0.1
server 202.120.2.101 prefer
server 127.127.1.0
fudge 127.127.1.0 stratum 10
driftfile /var /lib/ntp/drift
keys /etc/ntp/keys

3. Restart ntpd on the server side

service ntpd restart

Read More:

• [Solved] Bringing up interface eth0: Error: No suitable device found: no device found for connection ‘System eth0’.
• [Solved] @webservice Error: org.apache.cxf.common.i18n.UncheckedException: No operation was found with
• [Solved] selenium.common.exceptions.WebDriverException: Message: An unknown server-side error
• [Solved] Error:E0415 no suitable constructor exists to convert from “int“ to “Rational“
• Huawei kafka Authentication error: Server not found in Kerberos database (7) – LOOKING_UP_SERVER
• [Elasticsearch Exception]Found interface org.elasticsearch.common.bytes.BytesReference
• SpringBoot startup error Failed to determine a suitable driver class
• Gradle Package Project Lombok Not Working: No serializer found for class com.qbb.User and no properties discovered to create BeanSerializer……
• Vue Browser Error: Failed to load resource: the server responded with a status of 404 (Not Found)
• [Solved] Redis startup error Creating Server TCP listening socket 127.0.0.1:6379: bind: No error
• Internalerror: GPU sync failed error (How to Solve)
• No repositories directory found inside registry_ DATA_ DIR
• [Solved] TortoiseGitPlink Fatal Error: No supported authentication methods available (server sent: publi
• JMeter JDBC Error: No pool found named: ‘test‘ [How to Solve]
• Android Studio: Gradle project sync failed [How to Solve]
• [Solved] PostgreSQL Error: Could not connect to server: no such file or directory
• [Solved] Redis Error: Creating Server TCP listening socket *:6379: bind: No error
• [Solved] Spark Error: ERROR StatusLogger No log4j2 configuration file found
• jitpack.io ERROR: No build artifacts found [How to Solve]
• Error: Unable to build IHost No DbContext named ‘PersistedGrantDbContext‘ was found.