Configuring HP WebQoS for HP-UX

Using HP WebQoS
Troubleshooting
Chapter 4 117
/etc/opt/webqos/qos.conf file. MaxPollDescriptors defines the
maximum number of connections that are polled or checked for data.
Verify that MaxPollDescriptors is set to a reasonable value. If this
message continues to appear, then the web server may be under a
denial of service attack.
In this kind of denial of service attack, a “virtual vandal” is trying to
flood your web server with empty requests to try and prevent it from
serving valid requests. WebQoS protects your web server from this
type of attack by allowing the web server to continue to serve valid
requests.
Error Messages Viewable From the Terminal Window
SCA: Couldn't open trace file.
SCA: Couldn't open logging file.
These SCA error messages may appear on the console if one of the
following is true:
• The SCA is not started as root.
• The file system is full.
• The file system with the log or trace file is unmounted.
Logging and Tracing
The WebQos components use the following log files to record WebQoS
related activity. You can use these files to monitor the WebQoS server
and help with troubleshooting. The files are:
• /var/opt/webqos/logs/qoslog
• /var/opt/webqos/logs/qostrace
• /var/opt/webqos/measures
• /var/opt/webqos/logs/acclog
• /var/opt/webqos/logs/acctrace