目前有个springboot的项目，部署在服务器上，运行1天（观察时间几乎是24小时）后报错，错误如下
javax.security.sasl.SaslException: GSS initiate failed
at com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(GssKrb5Client.java:211)
at org.apache.thrift.transport.TSaslClientTransport.handleSaslStartMessage(TSaslClientTransport.java:94)
at org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:271)
at org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
at org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport$1.run(TUGIAssumingTransport.java:52)
at org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport$1.run(TUGIAssumingTransport.java:49)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866)
at org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport.open(TUGIAssumingTransport.java:49)
at org.apache.hive.jdbc.HiveConnection.openTransport(HiveConnection.java:196)
at org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:167)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:105)
at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)
at org.apache.commons.pool.impl.GenericObjectPool.addObject(GenericObjectPool.java:1691)
at org.apache.commons.pool.impl.GenericObjectPool.ensureMinIdle(GenericObjectPool.java:1648)
at org.apache.commons.pool.impl.GenericObjectPool.access$700(GenericObjectPool.java:192)
at org.apache.commons.pool.impl.GenericObjectPool$Evictor.run(GenericObjectPool.java:1784)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)
Caused by: org.ietf.jgss.GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)
at sun.security.jgss.krb5.Krb5InitCredential.getInstance(Krb5InitCredential.java:147)
at sun.security.jgss.krb5.Krb5MechFactory.getCredentialElement(Krb5MechFactory.java:122)
at sun.security.jgss.krb5.Krb5MechFactory.getMechanismContext(Krb5MechFactory.java:187)
at sun.security.jgss.GSSManagerImpl.getMechanismContext(GSSManagerImpl.java:224)
at sun.security.jgss.GSSContextImpl.initSecContext(GSSContextImpl.java:212)
at sun.security.jgss.GSSContextImpl.initSecContext(GSSContextImpl.java:179)
at com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(GssKrb5Client.java:192)
... 20 common frames omitted
因为自己对Kerberos了解也不是很多，所以看了些资料，然后去查看自己的krb5.tab文件，妨碍发现这么个东西
default_realm = ---------
dns_lookup_kdc = false
dns_lookup_realm = false
ticket_lifetime = 86400
renew_lifetime = 604800
forwardable = true
default_tgs_enctypes = rc4-hmac
default_tkt_enctypes = rc4-hmac
permitted_enctypes = rc4-hmac
udp_preference_limit = 1
kdc_timeout = 3000
[realms]
---.COM = {
kdc = --------.com
admin_server = --------.com
}
问题是不是在于没有
renewable = true
？？？
我对比一个网上的配置，少一个这，是因为这个导致没办法renew吗？
我的程序是报这个错，同一个认证在另一个程序上就正常，很费解
我连接hive的时候也报这个错了，你使用UserGroupInformation.loginUserFromKeytab(user,keyTabPath); 登录估计就不会有错了。
UserGroupInformation.loginUserFromSubject(lc.getSubject()) 这种方式不会更新票据。改配置的话没用，时间设置得再大总有过期的一天。
参考：https://blog.csdn.net/weixin_43172032/article/details/92986771