You might be running into https://issues.apache.org/jira/browse/IMPALA-5578, which is an issue with the Java Virtual machine (there's one embedded in the Impala daemon) and a Linux kernel update. See that JIRA for details.

You could try downgrading your kernel and restarting to confirm that that is indeed the issues. The suggested workaround to the problem, if confirmed, is to increase the -Xss parameter passed to the JVM.