1、在CDH集群中安装sentry重启时报错，以下是报错信息：
Tue Apr 21 09:40:21 CST 2015
JAVA_HOME=/usr/java/jdk1.7.0_45-cloudera
using /usr/java/jdk1.7.0_45-cloudera as JAVA_HOME
using 5 as CDH_VERSION
Debug is true storeKey true useTicketCache true useKeyTab true doNotPrompt true ticketCache is null isInitiator true KeyTab is /var/run/cloudera-scm-agent/process/1117-sentry-SENTRY_SERVER/sentry.keytab refreshKrb5Config is true principal is sentry/test1@NBDP.COM tryFirstPass is false useFirstPass is false storePass is false clearPass is false
Refreshing Kerberos configuration
Acquire TGT from Cache
Principal is sentry/test1@NBDP.COM
null credentials from Ticket Cache
principal is sentry/test1@NBDP.COM
Will use keytab
Commit Succeeded
[Krb5LoginModule]: Entering logout
[Krb5LoginModule]: logged out Subject
Service did not start successfully; not all of the required roles started: Service has only 0 Sentry Server roles running instead of minimum required 1.
请各位大神帮帮忙，谢谢！