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Fix to bug #622, http://bugs.skysql.com/show_bug.cgi?id=622

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Ensured that soft link and physical file will have same sequence number. Prevented some unnecessary error printing and added more precise logs.
This commit is contained in:
VilhoRaatikka 2014-12-02 20:02:00 +02:00
parent 8dc49f4c60
commit d608eb2532
2 changed files with 84 additions and 28 deletions
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102
log_manager/log_manager.cc
View File

@ -286,7 +286,8 @@ static char* add_slash(char* str);
static bool check_file_and_path(
char* filename,
bool* writable);
bool* writable,
bool do_log);
static bool file_is_symlink(char* filename);
static int skygw_log_disable_raw(logfile_id_t id, bool emergency); /*< no locking */
@ -2053,7 +2054,7 @@ static bool logfile_create(
* If file exists but is different type, create fails and
* new, increased sequence number is added to file name.
*/
if (check_file_and_path(lf->lf_full_file_name, &writable))
if (check_file_and_path(lf->lf_full_file_name, &writable, true))
{
/** Found similarly named file which isn't writable */
if (!writable || file_is_symlink(lf->lf_full_file_name))
@ -2077,13 +2078,12 @@ static bool logfile_create(
if (store_shmem)
{
if (check_file_and_path(lf->lf_full_file_name, &writable))
if (check_file_and_path(lf->lf_full_link_name, &writable, true))
{
/** Found similarly named file which isn't writable */
if (!writable ||
file_is_symlink(lf->lf_full_file_name))
/** Found similarly named link which isn't writable */
if (!writable)
{
unlink(lf->lf_full_file_name);
unlink(lf->lf_full_link_name);
nameconflicts = true;
}
}
@ -2214,7 +2214,6 @@ return_succp:
*
* @return Pointer to filename, of NULL if failed.
*
*
*/
static char* form_full_file_name(
strpart_t* parts,
@ -2231,9 +2230,21 @@ static char* form_full_file_name(
if (lf->lf_name_seqno != -1)
{
lf->lf_name_seqno = find_last_seqno(parts,
lf->lf_name_seqno,
seqnoidx);
int file_sn;
int link_sn = 0;
char* tmp = parts[0].sp_string;
file_sn = find_last_seqno(parts, lf->lf_name_seqno, seqnoidx);
if (lf->lf_linkpath != NULL)
{
tmp = parts[0].sp_string;
parts[0].sp_string = lf->lf_linkpath;
link_sn = find_last_seqno(parts, lf->lf_name_seqno, seqnoidx);
parts[0].sp_string = tmp;
}
lf->lf_name_seqno = MAX(file_sn, link_sn);
seqno = lf->lf_name_seqno;
s = UINTLEN(seqno);
seqnostr = (char *)malloc((int)s+1);
@ -2354,7 +2365,8 @@ static char* add_slash(
*/
static bool check_file_and_path(
char* filename,
bool* writable)
bool* writable,
bool do_log)
{
int fd;
bool exists;
@ -2382,11 +2394,23 @@ static bool check_file_and_path(
if (fd == -1)
{
fprintf(stderr,
"*\n* Error : Can't access %s due "
"to %s.\n",
filename,
strerror(errno));
if (do_log && file_is_symlink(filename))
{
fprintf(stderr,
"*\n* Error : Can't access "
"file pointed to by %s due "
"to %s.\n",
filename,
strerror(errno));
}
else if (do_log)
{
fprintf(stderr,
"*\n* Error : Can't access %s due "
"to %s.\n",
filename,
strerror(errno));
}
if (writable)
{
*writable = false;
@ -2403,11 +2427,24 @@ static bool check_file_and_path(
}
else
{
fprintf(stderr,
"*\n* Error : Can't write to "
"%s due to %s.\n",
filename,
strerror(errno));
if (do_log &&
file_is_symlink(filename))
{
fprintf(stderr,
"*\n* Error : Can't write to "
"file pointed to by %s due to "
"%s.\n",
filename,
strerror(errno));
}
else if (do_log)
{
fprintf(stderr,
"*\n* Error : Can't write to "
"%s due to %s.\n",
filename,
strerror(errno));
}
*writable = false;
}
}
@ -2417,10 +2454,21 @@ static bool check_file_and_path(
}
else
{
fprintf(stderr,
"*\n* Error : Can't access %s due to %s.\n",
filename,
strerror(errno));
if (do_log && file_is_symlink(filename))
{
fprintf(stderr,
"*\n* Error : Can't access the file "
"pointed to by %s due to %s.\n",
filename,
strerror(errno));
}
else if (do_log)
{
fprintf(stderr,
"*\n* Error : Can't access %s due to %s.\n",
filename,
strerror(errno));
}
exists = false;
if (writable)
@ -3061,7 +3109,7 @@ static int find_last_seqno(
}
}
if (check_file_and_path(filename, NULL))
if (check_file_and_path(filename, NULL, false))
{
seqno++;
}

10
server/MaxScale_template.cnf
View File

@ -31,7 +31,7 @@ threads=4
# backend_write_timeout=<timeout in seconds>
# backend_read_timeout=<timeout in seconds>
#
## mysql_monitor specific options:
## MySQL monitor-specific options:
#
# Enable detection of replication slaves lag via replication_heartbeat
# table - optional.
@ -43,6 +43,13 @@ threads=4
#
# detect_stale_master=[1|0] (default 0)
#
## Galera monitor-specific options:
#
# If disable_master_failback is not set, recovery of previously failed master
# causes mastership to be switched back to it. Enabling the option prevents it.
#
# disable_master_failback=[0|1] (default 0)
#
## Examples:
[MySQL Monitor]
@ -65,6 +72,7 @@ servers=server1,server2,server3
user=myuser
passwd=mypwd
monitor_interval=10000
disable_master_failback=1
## Filter definition
#