Akira Maeda glidenote

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

	#!/bin/bash
	#
	# ============================================================
	#
	# @license This program is free software.
	#
	# @category Script for Percona Server
	# @project Gedow Software
	# @package Gedow Percona Utils
	# @author GedowFather http://blog.father.gedow.net/

	#!/bin/sh
	if [ -z "$1" ]; then
	echo "usage: ./make-rpm.sh 0.2"
	exit 1
	fi
	version=$1
	cur=`pwd`

	rm -f fluent-agent-lite.v$version.tar.gz
	rm -fr fluent-agent-lite

	#!/bin/sh --
	set -e

	echo ""
	echo "START POST-MERGE HOOK"
	echo ""

	HOOK_DIR=`dirname $0` #git_hooks directory
	PROC_DIR="$HOOK_DIR/../.." #vimproc directory