Hey. Thanks for the advice thus far but I have the same problem on 10.9 with no resolution... the above solutions don't apply. (No funny apple stuff in apache conf, no permissions problems, logfiles exist, writable, working... and most odd of all... apache is in fact running and working.)
I just don't like the errors in the console... it disturbs me. Any other ideas? TIA.
2014/09/15 7:31:10,462 PM com.apple.launchd[1]: (org.apache.httpd[74008]) Exited with code: 1
2014/09/15 7:31:10,462 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 9 seconds
2014/09/15 7:31:15,828 PM 1PasswordAgent[430]: Failed to return databaseID, encryption key is not loaded
2014/09/15 7:31:23,562 PM com.apple.launchd[1]: (org.apache.httpd[74009]) Exited with code: 1
2014/09/15 7:31:23,562 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 6 seconds
2014/09/15 7:31:31,613 PM com.apple.launchd[1]: (org.apache.httpd[74010]) Exited with code: 1
2014/09/15 7:31:31,613 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 8 seconds
2014/09/15 7:31:42,430 PM com.apple.launchd[1]: (org.apache.httpd[74011]) Exited with code: 1
2014/09/15 7:31:42,430 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 8 seconds
2014/09/15 7:31:51,435 PM com.apple.launchd[1]: (org.apache.httpd[74012]) Exited with code: 1
2014/09/15 7:31:51,435 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 9 seconds
2014/09/15 7:32:04,516 PM com.apple.launchd[1]: (org.apache.httpd[74014]) Exited with code: 1
2014/09/15 7:32:04,516 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 6 seconds
2014/09/15 7:32:10,611 PM com.apple.launchd[1]: (org.apache.httpd[74015]) Exited with code: 1
2014/09/15 7:32:10,611 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 10 seconds
2014/09/15 7:32:21,306 PM com.apple.launchd[1]: (org.apache.httpd[74017]) Exited with code: 1
2014/09/15 7:32:21,307 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 10 seconds
2014/09/15 7:32:31,397 PM com.apple.launchd[1]: (org.apache.httpd[74018]) Exited with code: 1
2014/09/15 7:32:31,397 PM com.apple.launchd[1]: (org.apache.httpd) Throttling respawn: Will start in 10 seconds