Error Conditions

Errors messages are normally sent back to the caller after a "500 Server Error" header. However, in some instances the error occurs too early for a message to be sent. In these instances, Apache's error log can be examined for the source of the error. The Apache error log is usually in /var/log/httpd/error_log.

Sources of error in OMEIS

• NewPixels:
  • Authentication failure
  • Write error
  • Disk full
• Set* methods:
  • Authentication failure
  • Pixels do not exist
  • Pixels read only
  • Write error
• Get* methods:
  • Authentication failure
  • Pixels do not exist
  • Pixels write only
  • Read error
• Convert* methods:
  • Authentication failure
  • Pixels do not exist
  • Pixels read only
  • Write error
  • File doesn't exist
  • Read error