Hi @mike_bronson7 , were you able to solve the issue with those steps?   Thank you ... View more

Increase Solr Heap and restart the service, See if it fixes the issue ... View more

@Koffi  There are a couple of things here you first need to resolve too many open files issue by checking the ulimit $ ulimit -n To increase for the current session depending on the above output ulimit -n 102400 Edit /etc/security/limits.conf to make the change permanent. Then restart the kdc and kadmin depending on your Linux version systemctl   # /etc/rc.d/init.d/krb5kdc start # /etc/rc.d/init.d/kadmin start   Then restart Atlas from the Ambari UI    Please revert after these actions   Geoffrey                   ... View more

Hi @Koffi  Can you share gateway.log and audit.log during the timeframe when you are accessing  namenode ui. If namenode ui was accessible earlier, can you check if there was a failover done during the time from when it is not accessible.  Please share advanced topology file to check your configuration. ... View more

It is recommended to check if your cluster computing power is insufficient. Often, such errors occur when memory or CPU resources are insufficient. ... View more

Also on the Ambari UI, we have the following configuration for the service spark(Livy2) And in the Kerberos we have the following config:   My understanding is that the value in  the service spark(Livy2) conf     livy.server.launch.kerberos.principal livy/_HOST@<REALM>   is replaced by the value set in the Kerberos page   livy.server.launch.kerberos.principal ${livy2-env/livy2_user}/_HOST@${realm}   What is the value of livy2-env? Where can i get this info?   For livy2_user the value is livy according to the param set in ambari:   also please find below the list of principals that are in /etc/security/keytabs/livy.service.keytab and /etc/security/keytabs/spnego.service.keytab on the Livy2 server <HOST1> (or <HOST2>) host:   note exemple: <HA_HOST_URL> --> myhaproxy.test.com <HOST1_URL> --> hdp-dev-ms01.test.com  <HOST1> --> hdp-dev-ms01  <REALM>  --> CORP.MYREALM.COM ... View more

Hi Koffi,   Can you please provide more detail or point me to document which can be followed to setup haproxy in HDP hiveserver . We are currently using HDP2.6.5.   We are also looking for configuring haproxy for hivemetastore ,since we notice most of the connection going to the first metastore server mentioned in URI .We sometimes see 3 times the connections .  ... View more

@Koffi you can increase in spark conf as well ... View more