/*
* set backend connection close timer
*/
void pool_connection_pool_timer(POOL_CONNECTION_POOL *backend)
{
POOL_CONNECTION_POOL *p = pool_connection_pool;
int i;
pool_debug("pool_connection_pool_timer: set close time %ld", time(NULL));
MASTER_CONNECTION(backend)->closetime = time(NULL); /* set connection close time */
if (pool_config->connection_life_time == 0)
return;
/* look for any other timeout */
for (i=0;i<pool_config->max_pool;i++, p++)
{
if (!MASTER_CONNECTION(p))
continue;
if (!MASTER_CONNECTION(p)->sp)
continue;
if (MASTER_CONNECTION(p)->sp->user == NULL)
continue;
if (p != backend && MASTER_CONNECTION(p)->closetime)
return;
}
/* no other timer found. set my timer */
pool_debug("pool_connection_pool_timer: set alarm after %d seconds", pool_config->connection_life_time);
pool_signal(SIGALRM, pool_backend_timer_handler);
alarm(pool_config->connection_life_time);
}
void pool_backend_timer(void)
{
#define TMINTMAX 0x7fffffff
POOL_CONNECTION_POOL *p = pool_connection_pool;
int i, j;
time_t now;
time_t nearest = TMINTMAX;
ConnectionInfo *info;
POOL_SETMASK(&BlockSig);
now = time(NULL);
pool_debug("pool_backend_timer_handler called at %ld", now);
for (i=0;i<pool_config->max_pool;i++, p++)
{
if (!MASTER_CONNECTION(p))
continue;
if (!MASTER_CONNECTION(p)->sp)
continue;
if (MASTER_CONNECTION(p)->sp->user == NULL)
continue;
/* timer expire? */
if (MASTER_CONNECTION(p)->closetime)
{
int freed = 0;
pool_debug("pool_backend_timer_handler: expire time: %ld",
MASTER_CONNECTION(p)->closetime+pool_config->connection_life_time);
if (now >= (MASTER_CONNECTION(p)->closetime+pool_config->connection_life_time))
{
/* discard expired connection */
pool_debug("pool_backend_timer_handler: expires user %s database %s",
MASTER_CONNECTION(p)->sp->user, MASTER_CONNECTION(p)->sp->database);
pool_send_frontend_exits(p);
for (j=0;j<NUM_BACKENDS;j++)
{
if (!VALID_BACKEND(j))
continue;
if (!freed)
{
pool_free_startup_packet(CONNECTION_SLOT(p, j)->sp);
freed = 1;
}
pool_close(CONNECTION(p, j));
free(CONNECTION_SLOT(p, j));
}
info = p->info;
memset(p, 0, sizeof(POOL_CONNECTION_POOL));
p->info = info;
memset(p->info, 0, sizeof(ConnectionInfo) * MAX_NUM_BACKENDS);
/* prepare to shutdown connections to system db */
if(pool_config->system_db_dynamic_connection && (pool_config->parallel_mode || pool_config->enable_query_cache))
{
if (system_db_info->pgconn)
pool_close_libpq_connection();
if (pool_system_db_connection() && pool_system_db_connection()->con)
{
pool_send_frontend_exit(pool_system_db_connection()->con);
pool_close(pool_system_db_connection()->con);
}
if( system_db_info->connection )
{
free( system_db_info->connection );
memset(system_db_info->connection, 0, sizeof(POOL_CONNECTION_POOL_SLOT));
system_db_info->connection = NULL;
}
}
}
else
{
/* look for nearest timer */
if (MASTER_CONNECTION(p)->closetime < nearest)
nearest = MASTER_CONNECTION(p)->closetime;
}
}
}
/* any remaining timer */
if (nearest != TMINTMAX)
{
nearest = pool_config->connection_life_time - (now - nearest);
if (nearest <= 0)
nearest = 1;
pool_signal(SIGALRM, pool_backend_timer_handler);
alarm(nearest);
}
POOL_SETMASK(&UnBlockSig);
}
/*
* Read startup packet
*
* Read the startup packet and parse the contents.
*/
static StartupPacket *read_startup_packet(POOL_CONNECTION *cp)
{
StartupPacket *sp;
StartupPacket_v2 *sp2;
int protov;
int len;
char *p;
sp = (StartupPacket *)calloc(sizeof(*sp), 1);
if (!sp)
{
pool_error("read_startup_packet: out of memory");
return NULL;
}
if (pool_config->authentication_timeout > 0)
{
pool_signal(SIGALRM, authentication_timeout);
alarm(pool_config->authentication_timeout);
}
/* read startup packet length */
if (pool_read(cp, &len, sizeof(len)))
{
pool_error("read_startup_packet: incorrect packet length (%d)", len);
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
len = ntohl(len);
len -= sizeof(len);
if (len <= 0 || len >= MAX_STARTUP_PACKET_LENGTH)
{
pool_error("read_startup_packet: incorrect packet length (%d)", len);
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
sp->startup_packet = calloc(len, 1);
if (!sp->startup_packet)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
/* read startup packet */
if (pool_read(cp, sp->startup_packet, len))
{
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
sp->len = len;
memcpy(&protov, sp->startup_packet, sizeof(protov));
sp->major = ntohl(protov)>>16;
sp->minor = ntohl(protov) & 0x0000ffff;
p = sp->startup_packet;
switch(sp->major)
{
case PROTO_MAJOR_V2: /* V2 */
sp2 = (StartupPacket_v2 *)(sp->startup_packet);
sp->database = calloc(SM_DATABASE+1, 1);
if (!sp->database)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
strncpy(sp->database, sp2->database, SM_DATABASE);
sp->user = calloc(SM_USER+1, 1);
if (!sp->user)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
strncpy(sp->user, sp2->user, SM_USER);
break;
case PROTO_MAJOR_V3: /* V3 */
p += sizeof(int); /* skip protocol version info */
while(*p)
{
if (!strcmp("user", p))
{
p += (strlen(p) + 1);
sp->user = strdup(p);
if (!sp->user)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
}
else if (!strcmp("database", p))
{
p += (strlen(p) + 1);
sp->database = strdup(p);
if (!sp->database)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
}
/*
* From 9.0, the start up packet may include
* application name. After receiving such that packet,
* backend sends parameter status of application_name.
* Upon reusing connection to backend, we need to
* emulate this behavior of backend. So we remember
* this and send parameter status packet to frontend
* instead of backend in
* connect_using_existing_connection().
*/
else if (!strcmp("application_name", p))
{
p += (strlen(p) + 1);
sp->application_name = p;
pool_debug("read_startup_packet: application_name: %s", p);
}
p += (strlen(p) + 1);
}
break;
case 1234: /* cancel or SSL request */
/* set dummy database, user info */
sp->database = calloc(1, 1);
if (!sp->database)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
sp->user = calloc(1, 1);
if (!sp->user)
{
pool_error("read_startup_packet: out of memory");
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
break;
default:
pool_error("read_startup_packet: invalid major no: %d", sp->major);
pool_free_startup_packet(sp);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return NULL;
}
pool_debug("Protocol Major: %d Minor: %d database: %s user: %s",
sp->major, sp->minor, sp->database, sp->user);
alarm(0);
pool_signal(SIGALRM, SIG_IGN);
return sp;
}
/*
* fork escalation process
*/
pid_t
fork_escalation_process(void)
{
pid_t pid;
pid = fork();
if (pid != 0)
{
if (pid == -1)
ereport(NOTICE,
(errmsg("failed to fork a escalation process")));
return pid;
}
on_exit_reset();
processType = PT_WATCHDOG_UTILITY;
POOL_SETMASK(&UnBlockSig);
init_ps_display("", "", "", "");
pool_signal(SIGTERM, wd_exit);
pool_signal(SIGINT, wd_exit);
pool_signal(SIGQUIT, wd_exit);
pool_signal(SIGCHLD, SIG_DFL);
pool_signal(SIGHUP, SIG_IGN);
pool_signal(SIGPIPE, SIG_IGN);
MemoryContextSwitchTo(TopMemoryContext);
set_ps_display("watchdog escalation", false);
ereport(LOG,
(errmsg("watchdog: escalation started")));
/*
* STEP 1 clear shared memory cache
*/
if (pool_config->memory_cache_enabled && pool_is_shmem_cache() &&
pool_config->clear_memqcache_on_escalation)
{
ereport(LOG,
(errmsg("watchdog escalation"),
errdetail("clearing all the query cache on shared memory")));
pool_clear_memory_cache();
}
/*
* STEP 2 execute escalation command provided by user in pgpool conf file
*/
if (strlen(pool_config->wd_escalation_command))
{
int r = system(pool_config->wd_escalation_command);
if (WIFEXITED(r))
{
if (WEXITSTATUS(r) == EXIT_SUCCESS)
ereport(LOG,
(errmsg("watchdog escalation successful")));
else
{
ereport(WARNING,
(errmsg("watchdog escalation command failed with exit status: %d", WEXITSTATUS(r))));
}
}
else
{
ereport(WARNING,
(errmsg("watchdog escalation command exit abnormally")));
}
}
/*
* STEP 3 bring up the delegate IP
*/
if (strlen(pool_config->delegate_IP) != 0)
{
if (wd_IP_up() != WD_OK)
ereport(WARNING,
(errmsg("watchdog escalation failed to acquire delegate IP")));
}
exit(0);
}
/*
* fork de-escalation process
*/
pid_t
fork_plunging_process(void)
{
pid_t pid;
pid = fork();
if (pid != 0)
{
if (pid == -1)
ereport(NOTICE,
(errmsg("failed to fork a de-escalation process")));
return pid;
}
on_exit_reset();
processType = PT_WATCHDOG_UTILITY;
POOL_SETMASK(&UnBlockSig);
init_ps_display("", "", "", "");
pool_signal(SIGTERM, wd_exit);
pool_signal(SIGINT, wd_exit);
pool_signal(SIGQUIT, wd_exit);
pool_signal(SIGCHLD, SIG_DFL);
pool_signal(SIGHUP, SIG_IGN);
pool_signal(SIGPIPE, SIG_IGN);
MemoryContextSwitchTo(TopMemoryContext);
set_ps_display("watchdog de-escalation", false);
ereport(LOG,
(errmsg("watchdog: de-escalation started")));
/*
* STEP 1 execute de-escalation command provided by user in pgpool conf
* file
*/
if (strlen(pool_config->wd_de_escalation_command))
{
int r = system(pool_config->wd_de_escalation_command);
if (WIFEXITED(r))
{
if (WEXITSTATUS(r) == EXIT_SUCCESS)
ereport(LOG,
(errmsg("watchdog de-escalation successful")));
else
{
ereport(WARNING,
(errmsg("watchdog de-escalation command failed with exit status: %d", WEXITSTATUS(r))));
}
}
else
{
ereport(WARNING,
(errmsg("watchdog de-escalation command exit abnormally")));
}
}
/*
* STEP 2 bring down the delegate IP
*/
if (strlen(pool_config->delegate_IP) != 0)
{
if (wd_IP_down() != WD_OK)
ereport(WARNING,
(errmsg("watchdog de-escalation failed to bring down delegate IP")));
}
exit(0);
}
void pool_backend_timer(void)
{
#define TMINTMAX 0x7fffffff
POOL_CONNECTION_POOL *p = pool_connection_pool;
int i;
time_t now;
time_t nearest = TMINTMAX;
POOL_SETMASK(&BlockSig);
now = time(NULL);
pool_debug("pool_backend_timer_handler called at %d", now);
for (i=0;i<pool_config.max_pool;i++, p++)
{
if (!MASTER_CONNECTION(p))
continue;
if (MASTER_CONNECTION(p)->sp->user == NULL)
continue;
/* timer expire? */
if (MASTER_CONNECTION(p)->closetime)
{
pool_debug("pool_backend_timer_handler: expire time: %d",
MASTER_CONNECTION(p)->closetime+pool_config.connection_life_time);
if (now >= (MASTER_CONNECTION(p)->closetime+pool_config.connection_life_time))
{
/* discard expired connection */
pool_debug("pool_backend_timer_handler: expires user %s database %s", MASTER_CONNECTION(p)->sp->user, MASTER_CONNECTION(p)->sp->database);
pool_send_frontend_exits(p);
pool_free_startup_packet(MASTER_CONNECTION(p)->sp);
pool_close(MASTER_CONNECTION(p)->con);
free(MASTER_CONNECTION(p));
if (DUAL_MODE)
{
pool_close(SECONDARY_CONNECTION(p)->con);
free(SECONDARY_CONNECTION(p));
}
memset(p, 0, sizeof(POOL_CONNECTION_POOL));
}
else
{
/* look for nearest timer */
if (MASTER_CONNECTION(p)->closetime < nearest)
nearest = MASTER_CONNECTION(p)->closetime;
}
}
}
/* any remaining timer */
if (nearest != TMINTMAX)
{
nearest = pool_config.connection_life_time - (now - nearest);
if (nearest <= 0)
nearest = 1;
pool_signal(SIGALRM, pool_backend_timer_handler);
alarm(nearest);
}
POOL_SETMASK(&UnBlockSig);
}
/*
* pgpool main program
*/
int main(int argc, char **argv)
{
int opt;
int i;
int pid;
int size;
int retrycnt;
int sys_retrycnt;
myargc = argc;
myargv = argv;
snprintf(conf_file, sizeof(conf_file), "%s/%s", DEFAULT_CONFIGDIR, POOL_CONF_FILE_NAME);
snprintf(pcp_conf_file, sizeof(pcp_conf_file), "%s/%s", DEFAULT_CONFIGDIR, PCP_PASSWD_FILE_NAME);
snprintf(hba_file, sizeof(hba_file), "%s/%s", DEFAULT_CONFIGDIR, HBA_CONF_FILE_NAME);
while ((opt = getopt(argc, argv, "a:cdf:F:hm:nv")) != -1)
{
switch (opt)
{
case 'a': /* specify hba configuration file */
if (!optarg)
{
usage();
exit(1);
}
strncpy(hba_file, optarg, sizeof(hba_file));
break;
case 'c': /* clear cache option */
clear_cache = 1;
break;
case 'd': /* debug option */
debug = 1;
break;
case 'f': /* specify configuration file */
if (!optarg)
{
usage();
exit(1);
}
strncpy(conf_file, optarg, sizeof(conf_file));
break;
case 'F': /* specify PCP password file */
if (!optarg)
{
usage();
exit(1);
}
strncpy(pcp_conf_file, optarg, sizeof(pcp_conf_file));
break;
case 'h':
usage();
exit(0);
break;
case 'm': /* stop mode */
if (!optarg)
{
usage();
exit(1);
}
if (*optarg == 's' || !strcmp("smart", optarg))
stop_sig = SIGTERM; /* smart shutdown */
else if (*optarg == 'f' || !strcmp("fast", optarg))
stop_sig = SIGINT; /* fast shutdown */
else if (*optarg == 'i' || !strcmp("immediate", optarg))
stop_sig = SIGQUIT; /* immediate shutdown */
else
{
usage();
exit(1);
}
break;
case 'n': /* no detaching control ttys */
not_detach = 1;
break;
case 'v':
show_version();
exit(0);
default:
usage();
exit(1);
}
}
mypid = getpid();
if (pool_init_config())
exit(1);
if (pool_get_config(conf_file, INIT_CONFIG))
{
pool_error("Unable to get configuration. Exiting...");
exit(1);
}
if (pool_config->enable_pool_hba)
load_hba(hba_file);
/*
* If a non-switch argument remains, then it should be either "reload" or "stop".
*/
if (optind == (argc - 1))
{
if (!strcmp(argv[optind], "reload"))
{
pid_t pid;
pid = read_pid_file();
if (pid < 0)
{
pool_error("could not read pid file");
pool_shmem_exit(1);
exit(1);
}
if (kill(pid, SIGHUP) == -1)
{
pool_error("could not reload configuration file pid: %d. reason: %s", pid, strerror(errno));
pool_shmem_exit(1);
exit(1);
}
pool_shmem_exit(0);
exit(0);
}
if (!strcmp(argv[optind], "stop"))
{
stop_me();
pool_shmem_exit(0);
exit(0);
}
else
{
usage();
pool_shmem_exit(1);
exit(1);
}
}
/*
* else if no non-switch argument remains, then it should be a start request
*/
else if (optind == argc)
{
pid = read_pid_file();
if (pid > 0)
{
if (kill(pid, 0) == 0)
{
fprintf(stderr, "pid file found. is another pgpool(%d) is running?\n", pid);
exit(1);
}
else
fprintf(stderr, "pid file found but it seems bogus. Trying to start pgpool anyway...\n");
}
}
/*
* otherwise an error...
*/
else
{
usage();
exit(1);
}
/* set signal masks */
poolinitmask();
if (not_detach)
write_pid_file();
else
daemonize();
if (pool_semaphore_create(MAX_NUM_SEMAPHORES))
{
pool_error("Unable to create semaphores. Exiting...");
pool_shmem_exit(1);
exit(1);
}
/*
* Restore previous backend status if possible
*/
read_status_file();
/* clear cache */
if (clear_cache && pool_config->enable_query_cache && SYSDB_STATUS == CON_UP)
{
Interval interval[1];
interval[0].quantity = 0;
interval[0].unit = second;
pool_clear_cache_by_time(interval, 1);
}
/* set unix domain socket path */
snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), "%s/.s.PGSQL.%d",
pool_config->socket_dir,
pool_config->port);
/* set up signal handlers */
pool_signal(SIGPIPE, SIG_IGN);
/* create unix domain socket */
unix_fd = create_unix_domain_socket(un_addr);
/* create inet domain socket if any */
if (pool_config->listen_addresses[0])
{
inet_fd = create_inet_domain_socket(pool_config->listen_addresses, pool_config->port);
}
size = pool_config->num_init_children * pool_config->max_pool * sizeof(ConnectionInfo);
con_info = pool_shared_memory_create(size);
if (con_info == NULL)
{
pool_error("failed to allocate connection informations");
myexit(1);
}
memset(con_info, 0, size);
size = pool_config->num_init_children * (sizeof(ProcessInfo));
pids = pool_shared_memory_create(size);
if (pids == NULL)
{
pool_error("failed to allocate pids");
myexit(1);
}
memset(pids, 0, size);
for (i = 0; i < pool_config->num_init_children; i++)
{
pids[i].connection_info = &con_info[i * pool_config->max_pool];
}
/* create fail over/switch over event area */
Req_info = pool_shared_memory_create(sizeof(POOL_REQUEST_INFO));
if (Req_info == NULL)
{
pool_error("failed to allocate Req_info");
myexit(1);
}
/* initialize Req_info */
Req_info->kind = NODE_UP_REQUEST;
memset(Req_info->node_id, -1, sizeof(int) * MAX_NUM_BACKENDS);
Req_info->master_node_id = get_next_master_node();
Req_info->conn_counter = 0;
InRecovery = pool_shared_memory_create(sizeof(int));
if (InRecovery == NULL)
{
pool_error("failed to allocate InRecovery");
myexit(1);
}
*InRecovery = 0;
/*
* We need to block signal here. Otherwise child might send some
* signals, for example SIGUSR1(fail over). Children will inherit
* signal blocking but they do unblock signals at the very beginning
* of process. So this is harmless.
*/
POOL_SETMASK(&BlockSig);
/* fork the children */
for (i=0;i<pool_config->num_init_children;i++)
{
pids[i].pid = fork_a_child(unix_fd, inet_fd, i);
pids[i].start_time = time(NULL);
}
/* set up signal handlers */
pool_signal(SIGTERM, exit_handler);
pool_signal(SIGINT, exit_handler);
pool_signal(SIGQUIT, exit_handler);
pool_signal(SIGCHLD, reap_handler);
pool_signal(SIGUSR1, failover_handler);
pool_signal(SIGUSR2, wakeup_handler);
pool_signal(SIGHUP, reload_config_handler);
/* create pipe for delivering event */
if (pipe(pipe_fds) < 0)
{
pool_error("failed to create pipe");
myexit(1);
}
pool_log("pgpool successfully started");
/* fork a child for PCP handling */
snprintf(pcp_un_addr.sun_path, sizeof(pcp_un_addr.sun_path), "%s/.s.PGSQL.%d",
pool_config->pcp_socket_dir,
pool_config->pcp_port);
pcp_unix_fd = create_unix_domain_socket(pcp_un_addr);
/* maybe change "*" to pool_config->pcp_listen_addresses */
pcp_inet_fd = create_inet_domain_socket("*", pool_config->pcp_port);
pcp_pid = pcp_fork_a_child(pcp_unix_fd, pcp_inet_fd, pcp_conf_file);
retrycnt = 0; /* reset health check retry counter */
sys_retrycnt = 0; /* reset SystemDB health check retry counter */
/*
* This is the main loop
*/
for (;;)
{
CHECK_REQUEST;
/* do we need health checking for PostgreSQL? */
if (pool_config->health_check_period > 0)
{
int sts;
int sys_sts = 0;
unsigned int sleep_time;
if (retrycnt == 0)
{
pool_debug("starting health checking");
}
else
{
pool_debug("retrying %d th health checking", retrycnt);
}
if (pool_config->health_check_timeout > 0)
{
/*
* set health checker timeout. we want to detect
* communication path failure much earlier before
* TCP/IP stack detects it.
*/
pool_signal(SIGALRM, health_check_timer_handler);
alarm(pool_config->health_check_timeout);
}
/*
* do actual health check. trying to connect to the backend
*/
errno = 0;
health_check_timer_expired = 0;
POOL_SETMASK(&UnBlockSig);
sts = health_check();
POOL_SETMASK(&BlockSig);
if (pool_config->parallel_mode || pool_config->enable_query_cache)
sys_sts = system_db_health_check();
if ((sts > 0 || sys_sts < 0) && (errno != EINTR || (errno == EINTR && health_check_timer_expired)))
{
if (sts > 0)
{
sts--;
if (!pool_config->parallel_mode)
{
pool_log("set %d th backend down status", sts);
Req_info->kind = NODE_DOWN_REQUEST;
Req_info->node_id[0] = sts;
failover();
/* need to distribute this info to children */
}
else
{
retrycnt++;
pool_signal(SIGALRM, SIG_IGN); /* Cancel timer */
if (retrycnt > NUM_BACKENDS)
{
/* retry count over */
pool_log("set %d th backend down status", sts);
Req_info->kind = NODE_DOWN_REQUEST;
Req_info->node_id[0] = sts;
failover();
retrycnt = 0;
}
else
{
/* continue to retry */
sleep_time = pool_config->health_check_period/NUM_BACKENDS;
pool_debug("retry sleep time: %d seconds", sleep_time);
pool_sleep(sleep_time);
continue;
}
}
}
if (sys_sts < 0)
{
sys_retrycnt++;
pool_signal(SIGALRM, SIG_IGN);
if (sys_retrycnt > NUM_BACKENDS)
{
pool_log("set SystemDB down status");
SYSDB_STATUS = CON_DOWN;
sys_retrycnt = 0;
}
else if (sts == 0) /* goes to sleep only when SystemDB alone was down */
{
sleep_time = pool_config->health_check_period/NUM_BACKENDS;
pool_debug("retry sleep time: %d seconds", sleep_time);
pool_sleep(sleep_time);
continue;
}
}
}
if (pool_config->health_check_timeout > 0)
{
/* seems ok. cancel health check timer */
pool_signal(SIGALRM, SIG_IGN);
}
sleep_time = pool_config->health_check_period;
pool_sleep(sleep_time);
}
else
{
for (;;)
{
int r;
struct timeval t = {3, 0};
POOL_SETMASK(&UnBlockSig);
r = pool_pause(&t);
POOL_SETMASK(&BlockSig);
if (r > 0)
break;
}
}
}
pool_shmem_exit(0);
}