4.2.8 Collecting I/O filter trace information

I/O filter trace information indicates the trace information collected when the input and output filter function implemented in a module is executed.

The I/O filter trace information collection functionality can be used when the HWSRequestLog directive is specified and filter is specified in the HWSRequestLogType directive. I/O filter trace information is useful for isolating an error that occurred in a module filter. Due to the large amount of data output for I/O filter trace information, we do not recommend using it for anything aside from debugging.

Organization of this subsection
(1) Trace information format

(1) Trace information format

The items below are output for I/O filter trace information.

Note that hereafter the server-process-ID indicates the server-thread-ID for the Windows version.

Legend:
[Figure]: Space
#: For the output filter, in-filter is changed to out-filter.
(Output example)

[Tue Nov 21 15:18:40 2006] hws : in-filter --> (core_in[60])(1716)
[Tue Nov 21 15:18:40 2006] hws : in-filter <-- (core_in[60])(1716)(0)