server encountered an unexpected condition that prevented it from fulfilling the request
49
What is a NullPointerException, and how do I fix it?
12053
Connection to SQL Server Works Sometimes
103319
What can be the reasons of connection refused errors?
54490
What's wrong with using $_REQUEST[]?
102601
Ajax post displaying an inadequate message
132146
Response.Redirect and thread was being aborted error?
109608
The SMTP server requires a secure connection or the client was not authenticated.
37852
How to handle UNABLE_LOCK_ROW errors when this is caused by a batch APEX job
141019
Understanding IP . The requested URL was not found on this server
93513
(#200) The user hasn't authorized the application to perform this action
158256
"The service is temporarily unavailable" vs. "...not available"
128798
Networking code sometimes throws UnknownHostException
14333
PHP local server Invalid request (Unexpected EOF)
71501
HTTP Status 404 - The requested resource (/) is not available
125639
client denied by server configuration
70707
Procedure expects parameter which was not supplied
20633
java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has been committed