Hi,   This is very strange, but we had a similar problem two days ago. Some queries in impala started to fall with an Kerberos error:   Couldn't setup connection for impala/impalad-hostname@domain.com to NN-hostname/NN-ip:8020 Caused by: KrbException: TGT has been revoked (20) at sun.security.krb5.KrbTgsRep.<init>(KrbTgsRep.java:70) … ... 37 more Caused by: KrbException: Identifier doesn't match expected value (906)   We noticed such errors only in Impalad and Impala Catalogd services. Other services like HDFS works fine.   We suspect that the causes of the problem (TGT has been revoked) are in Windows domain. ... View more