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Editorial Team
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Asked: 2026-05-31T08:18:20+00:00

My Apache2 hangs. I can’t get any response from it. I tried to run

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My Apache2 hangs. I can’t get any response from it.

I tried to run wget localhost

it just hangs like this:

--2012-03-12 06:36:40--  http://localhost/
Resolving localhost... 127.0.0.1
Connecting to localhost|127.0.0.1|:80... connected.
HTTP request sent, awaiting response...

How can I get more debug information?

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1 Answer

  1. Editorial Team

    Use netstat -nt to see what connections there are to port 80 from 127.0.0.1.

    You can use fuser -n tcp 80,127.0.0.1,<port-number> to look for the PID of the Apache process which has port 80 TCP connection from 127.0.0.1 from the given .

    Then do an strace -p <pid> on that process to see what it’s doing at the system call level.

    You can take out the pid-finding steps if you restart Apache in single-process mode (provided that the hang still reproduces!) If that were the case I would just run that Apache under strace and capture the trace.

    Based on that I would decide what to do next. Is it hanging in a syscall, not hanging in a syscall, … which syscall. Last resorts would be getting a debugging build and gdb-ing it.

    Apache debugging guide: http://httpd.apache.org/dev/debugging.html

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