https://community.cloudera.com/t5/Support-Questions/Error-while-enabling-kerberos/m-p/71781#M2949 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/4054">@bgooley</a>&nbsp;</P><P>&nbsp;</P><P>ldaps:// smoothly generated the accounts,&nbsp;&nbsp;unicodepwd, usersharedcontrol&nbsp;must be needed for AD to create users and for those ldaps&nbsp;is mandatory. I think it should be added to Cloudera&nbsp;documentation.</P><P>&nbsp;</P><P>kinit -kt /var/run/cloudera-scm-agent/process/`ls -lrt /var/run/cloudera-scm-agent/process/ | awk '{print $9}' |grep zookeeper| tail -1`/zookeeper.keytab principal</P><P>[root@hostname sbalusu_c@example.com]# klist<BR />Ticket cache: KEYRING:persistent:0:0<BR />Default principal: zookeeper/hostname.example.com@EXAMPLE.COM</P><P>Valid starting Expires Service principal<BR />07/12/2018 16:12:00 07/13/2018 02:12:00 krbtgt/EXAMPLE.COM@EXAMPLE.COM<BR />renew until 07/19/2018 16:11:59</P><P>&nbsp;</P><P>I have added udp_preference_limit=1 but still getting the earlier error:</P><TABLE><TBODY><TR><TD>4:17:47.210 PM</TD><TD>ERROR</TD><TD>QuorumPeerMain</TD><TD><PRE>Unexpected exception, exiting abnormally java.io.IOException: Could not configure server because SASL configuration did not allow the ZooKeeper server to authenticate itself properly: javax.security.auth.login.LoginException: ICMP Port Unreachable at org.apache.zookeeper.server.ServerCnxnFactory.configureSaslLogin(ServerCnxnFactory.java:207) at org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:87) at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:135) at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116) at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:79)</PRE></TD></TR></TBODY></TABLE><P>&nbsp;</P><P>Documentation does not talk about ICMP port, I tried enabling debug mode but could not figure out which port it is looking for. Any idea?</P><P>&nbsp;</P><P>&nbsp;</P><P>Thanks &amp; Regards,</P><P>Siva</P><P>&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P> Thu, 12 Jul 2018 21:39:26 GMT balusu 2018-07-12T21:39:26Z