I traced this into the Apache source code (ver 2.4.4). It looks like the
error message string is really limited by the size of 8KB.
This line is in server/log.c:1097
"
static void log_error_core(const char *file, int line, int module_index,
int level,
apr_status_t status, const server_rec *s,
const conn_rec *c,
const request_rec *r, apr_pool_t *pool,
const char *fmt, va_list args)
{
char errstr[MAX_STRING_LEN];
"
"
And MAX_STRING_LEN is defined in include/httpd.h:298
/** The default string length */
#define MAX_STRING_LEN HUGE_STRING_LEN
/** The length of a Huge string */
#define HUGE_STRING_LEN 8192
"
I tried to increase this value, recompile, and apparently I got a longer
message.
Please correct me if I am wrong... If this is true then can anyone tell
me why this "HUGE_STRING_LEN" value is a hard-coded value but not a
configurable option ?
Cheers, Vu
On 03/13/2013 11:16 AM, Eric Covener wrote:
On Wed, Mar 13, 2013 at 6:01 AM, Hoang Vu Dang <dang....@gmail.com> wrote:
Hi guys,
Is there any limit of the size of a message log entry? How to control this ?
I did this:
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, f->r,
"%s", buffer);
And the buffer was truncated on the error log. I check the strlen of the buffer
and it was about 320K, and I got only around: ~ 8KB
If it's more than PIPE_BUF, it won't be atomic and can be interleaved
with other entries. Are you sure it's truncated and not just spread
out?
