When running a few of the tracks, I get the following error trying to read/write to /proc/pid/io.
ES Rally is running on Amazon Linux on a t2.medium. Any ideas?
[ec2-user@ip-XXX-XXX-XXX-XXX /]$ esrally --track=geopoint --distribution-version=5.5.0
____ ____
/ __ ____ / / / __
/ // / __ `/ / / / / /
/ , / // / / / // /
// ||_,///_, /
/____/
[INFO] Writing logs to /home/ec2-user/.rally/logs/rally_out_20171020T190634Z.log
[INFO] Rally will delete the benchmark candidate after the benchmark
[INFO] Racing on track [geopoint], challenge [append-no-conflicts] and car ['defaults']
[ERROR] Cannot race. (psutil.AccessDenied (pid=10135), 'Traceback (most recent call last):\n File "/usr/local/lib64/python3.4/site-packages/psutil/_pslinux.py", line 899, in wrapper\n return fun(self, *args, **kwargs)\n File "/usr/local/lib64/python3.4/site-packages/psutil/_pslinux.py", line 980, in io_counters\n with open_binary(fname) as f:\n File "/usr/local/lib64/python3.4/site-packages/psutil/_pslinux.py", line 141, in open_binary\n return open(fname, "rb", **kwargs)\nPermissionError: [Errno 13] Permission denied: '/proc/10135/io'\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n File "/usr/local/lib/python3.4/site-packages/esrally/mechanic/mechanic.py", line 457, in receiveMessage\n self.mechanic.on_benchmark_start()\n File "/usr/local/lib/python3.4/site-packages/esrally/mechanic/mechanic.py", line 589, in on_benchmark_start\n node.on_benchmark_start()\n File "/usr/local/lib/python3.4/site-packages/esrally/mechanic/cluster.py", line 38, in on_benchmark_start\n self.telemetry.on_benchmark_start()\n File "/usr/local/lib/python3.4/site-packages/esrally/mechanic/telemetry.py", line 62, in on_benchmark_start\n device.on_benchmark_start()\n File "/usr/local/lib/python3.4/site-packages/esrally/mechanic/telemetry.py", line 311, in on_benchmark_start\n self.process_start = sysstats.process_io_counters(self.process)\n File "/usr/local/lib/python3.4/site-packages/esrally/utils/sysstats.py", line 64, in process_io_counters\n return handle.io_counters()\n File "/usr/local/lib64/python3.4/site-packages/psutil/init.py", line 703, in io_counters\n return self._proc.io_counters()\n File "/usr/local/lib64/python3.4/site-packages/psutil/_pslinux.py", line 907, in wrapper\n raise AccessDenied(self.pid, self._name)\npsutil.AccessDenied: psutil.AccessDenied (pid=10135)\n')