log4j:ERROR Could not find value for key log4j.appender.File log4j:ERROR Could not instantiate appender named "File". log4j:ERROR Could not find value for key log4j.appender.Syslog log4j:ERROR Could not instantiate appender named "Syslog".
I'm running on a Mac / Yosemite java: 1.8.0_66-b17
Someone else at the blog site mentioned that they had the same problem, but no solution was given.
I was able to fix this problem myself by copying the dev version of the log4j properties to log4j.properties. My guess is that the default file would cause deployment failure for everyone.
Had the same problem, but realized that it does not actually stop activiti from running. Just the logging does not work, you can fix the appenders so that it does not show the error.