Trying to Cancel Long Running Impala Queries Fails with "Error communicating with the Impala Daemon"
Last updated on JUNE 30, 2016
Applies to:Big Data Appliance Integrated Software - Version 2.5.0 and later
When attempting to cancel an Impala query through the Cloudera Manager Web Interface, an internal error is reported and the query is not canceled.
Note: Other issues such as SSL/TLS setup can also cause this message in the web UI.
In this case, clicking cancel on the query reports:
Clicking again reports:
The cloudera-scm-server.log shows an error similar to the following immediately after attempting to cancel a query:
java.io.IOException: Login failure for impala/cdh-dn13.internal@CDH.EXAMPLE.COM from keytab /tmp/1285648306842-0/hadoop9673548602948576382.keytab
The keytab file and its enclosing directory listed in the error message do not exist at the time the error is generated.
After restarting the cloudera-scm-server, the keytab file is recreated, and queries can be canceled as expected. However, the issue will eventually recur. After the first recurrence, it will persist until the next cloudera-scm-server restart
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