I had some issues installing the community edition of MemSQL due to the fact one of my machines only had two cores. I installed a new processor with four cores but I'm still having issues staring MemSQL. Here is the log file output:
5-22 21:18:15 INFO: Log opened 00000074 2015-05-22 21:18:15 WARN: max_connections will be throttled from 100000 to 3896 because the system resource 'NOFILE' is limited to 4096 00000155 2015-05-22 21:18:15 ERROR: open('/var/lib/memsql-ops/data/installs/MI817e82c8195841a1b29c3220a800bcd3/data/Hal.pid', O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR) failed. Error Permission denied (13) 00000176 2015-05-22 21:18:15 ERROR: Failed to start MemSQL
I attempted to un-install and start over from scratch but the directions I have for un-install do not appear to work with the community version.
The output of the logfile you attached appears to be truncated, but the most common reason you see such an error is a permissions issue with your data directory.
The easiest way to uninstall is memsql-ops uninstall. It will print a command that you must run to delete the corresponding MemSQL nodes before the uninstall completes. There is no distinction between community and enterprise editions of MemSQL with respect to install/uninstall.