Red Hat DIRECTORY SERVER 2.0 - GATEWAY Manual de usuario descargar pdf (Pagina 56)

Chapter 7. Logging

[Mon Mar 24 09:50:58 2003] [notice] caught SIGTERM, shutting down

Figure 7-2. error_log: Shutting down

Analogous to SIGHUP is SIGTERM which is another of these operating system sig-

nals, but one with a universal function. It is the instruction to a process to shut down.

[Wed Mar 26 09:25:50 2003] [error] [client 131.111.10.87] File does

not exist: /var/www/CHEESE/nonesuch.html

Figure 7-3. error_log: File not found

Another commonly occuring error_log line is the one corresponding to a request

for a ﬁle that does not exist.

So far, the error_log lines we have looked at have had a standard format:

• [date]

• [severity]

• message

Table 7-1. Logging levels

Level Meaning Example

emerg System is unusable. The

entire web service has

failed.

“Child cannot open lock file.

Exiting”

alert Action must be taken

immediately. The entire

web service has either

failed already or is

imminent danger of failing

completely.

“getpwuid: couldn’t determine

user name from uid”

crit Critical condition. A child

server has failed and

others are likely to follow.

“socket: Failed to get a socket,

exiting child”

error A request on a single

request.

“File does not exist:

/var/www/CHEESE/nonesuch.html”

warn Warnings. “child process 10108 still did

not exit, sending a SIGTERM”

notice Normal behaviour but

worthy of notice.

“Apache/2.0.40 (Red Hat Linux)

configured -- resuming normal

operations”

info Purely informational “Server seems busy, (you may need

to increase StartServers, or

Min/MaxSpareServers)...”

debug Debugging. “Opening config file ...”

We can change the level of the logging (of formatted messages) with the LogLevel

command. Either globally, or within speciﬁc virtual hosts’ sections we can issue the

command LogLevel debug, say, to get more debugging.

Messages issued from a running web server are well formatted. However, if you

make a syntax error in the httpd.conf ﬁle then the server won’t launch and the

error message is rather more stark.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 95 96

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