Four different impala-shell processes hanged in the same place during Kerberos authentication.
The impala-shell processes have the following network connections:
However neither the KDC nor impalad show these connections.
The impala-shell processes are using 100% CPU. These three system calls are being made in a tight loop:
It looks like this is a version 2.9.0 impala-shell running against a version 2.11.0 (pre-release) server.