Avamar：由於主機名稱組態問題，無法啟動 MCS

嘗試啟動管理主控台伺服器 （MCS） 服務會導致下列錯誤：

admin@<incorrect-hostname>: mcserver.sh --start

Starting the database server.
Waiting for postmaster to start ..Started
Start MCDB: processing time = 2 s.
Check MCS: processing time = 8 s.
INFO: Starting messaging service.
INFO: Started messaging service.
Start Message Broker: processing time = 12 s.
=== BEGIN === check.mcs (prestart)
ERROR: check.mcs: [<incorrect-hostname>] checking if entry for <incorrect-hostname> is correctly defined in /etc/hosts CHECK FAILED: <incorrect-hostname> entry in /etc/hosts not found or incorrect
check.mcs                        failed
*** FAIL *** check.mcs FAILED OVERALL (prestart)
Starting Administrator Server at Fri May 26 04:54:25 JST 2023 ...
Upgrade MCS Preference: processing time = 286ms
Upgrade MCDB: processing time = 1634ms
Check node list: processing time = 1064ms
Prepare MC SSL Properties: processing time = 1ms
java.net.UnknownHostException: <incorrect-hostname>: <incorrect-hostname>: Name or service not known
        at java.net.InetAddress.getLocalHost(Unknown Source)
        at com.avamar.asn.Node.setPrefs(Node.java:345)
        at com.avamar.asn.Node.init(Node.java:209)
        at com.avamar.asn.Node.<init>(Node.java:89)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:110)
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:280)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1035)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:939)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
        at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1097)
        at com.avamar.mc.util.MCSpringUtil.getBean(MCSpringUtil.java:96)
        at com.avamar.mc.CLI.start(CLI.java:355)
        at com.avamar.mc.CLI.process(CLI.java:133)
        at com.avamar.mc.CLI.main(CLI.java:104)
Caused by: java.net.UnknownHostException: <incorrect-hostname>: Name or service not known
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(Unknown Source)
        at java.net.InetAddress.getAddressesFromNameService(Unknown Source)
        ... 24 more
java.net.UnknownHostException: <incorrect-hostname>: <incorrect-hostname>: Temporary failure in name resolution
        at java.net.InetAddress.getLocalHost(Unknown Source)
        at com.avamar.asn.Node.setPrefs(Node.java:345)
        at com.avamar.asn.Node.init(Node.java:209)
        at com.avamar.asn.Node.<init>(Node.java:89)
        at com.avamar.mc.CLI.start(CLI.java:357)
        at com.avamar.mc.CLI.process(CLI.java:133)
        at com.avamar.mc.CLI.main(CLI.java:104)
Caused by: java.net.UnknownHostException: <incorrect-hostname>: Temporary failure in name resolution
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(Unknown Source)
        at java.net.InetAddress.getAddressesFromNameService(Unknown Source)
        ... 7 more
Administrator Server startup failed at Fri May 26 04:54:36 JST 2023: Closing all connections to database. Node initialization failed.
Starting REST API Service.....
REST API Service startup failed.
Start MC Rest: processing time = 11 s.
=== Start Avamar Certificate Service ===
Avamar Certificate Service started.

根據上述輸出，故障發生在名稱解析中，導致未知主機例外：

java.net.UnknownHostException: <incorrect-hostname>: <incorrect-hostname>: Name or service not known

當 Java 程式碼嘗試取得本機主機名稱資訊時，會因主機名稱組態問題而失敗：

範例：

hostname

<incorrect-hostname>

hostname -f 

hostname: Temporary failure in name resolution

hostname -i

hostname: Name or service not known

1.執行下列命令以更新主機名稱：

hostname <correct-hostname>

例如：若要將主機名稱設定為 avamar-prod-fs1：

hostname avamar-prod-fs1

2.確認主機名稱值 （使用相同的範例）

hostname

avamar-prod-fs1

hostname -f 

avamar-prod-fs1.company.com

hostname -i

10.1.2.3

3.啟動 MCS 並繼續備份排程器：

mcserver.sh --start

dpnctl start sched

如需有關啟動 MCS 的詳細資訊，請參閱下列文章：Avamar：如何重新啟動管理主控台伺服器