Internal MariaDB error code: 1927 ('Connection was killed')
Edit: filed a bug report at https://jira.mariadb.org/browse/MDEV-14493
Mariadb nodes freeze occasionally with the following error in the logs, any clues?
(drupal app, db freezes on clearing application cache)
[Warning] WSREP: Failed to apply app buffer: seqno: 903792, status: 1
Nov 23 21:42:55 websrv4 mysqld[1725]: #011 at
galera/src/trx_handle.cpp:apply():351
Nov 23 21:42:55 websrv4 mysqld[1725]: Retrying 2th time
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[Warning] WSREP: BF applier failed to open_and_lock_tables: 1927, fatal: 0
wsrep = (exec_mode: 1 conflict_state: 5 seqno: 903792)
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[ERROR] Slave SQL: Error executing row event: 'Connection was killed',
Internal MariaDB error code: 1927
mariadb galera multi-master mariadb-10.1
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
bumped to the homepage by Community♦ 8 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
|
show 1 more comment
Edit: filed a bug report at https://jira.mariadb.org/browse/MDEV-14493
Mariadb nodes freeze occasionally with the following error in the logs, any clues?
(drupal app, db freezes on clearing application cache)
[Warning] WSREP: Failed to apply app buffer: seqno: 903792, status: 1
Nov 23 21:42:55 websrv4 mysqld[1725]: #011 at
galera/src/trx_handle.cpp:apply():351
Nov 23 21:42:55 websrv4 mysqld[1725]: Retrying 2th time
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[Warning] WSREP: BF applier failed to open_and_lock_tables: 1927, fatal: 0
wsrep = (exec_mode: 1 conflict_state: 5 seqno: 903792)
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[ERROR] Slave SQL: Error executing row event: 'Connection was killed',
Internal MariaDB error code: 1927
mariadb galera multi-master mariadb-10.1
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
bumped to the homepage by Community♦ 8 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Just checking, is your application adhering to the Galera limitations such as the requirement that all tables must have an explicit primary key? From experience, Galera will die if you have a table without a primary key, and then delete data from it. "Clearing application cache" sounds like something that could be deleting rows.
– dbdemon
Nov 26 '17 at 16:21
its drupal so probably yes. and only under load, and only sometimes (almost daily). cache is cleared anyway every 3 hours or less.
– Alon Oz
Nov 26 '17 at 16:32
Is your application configured to access more than one DB node, e.g. through a DB proxy (like MaxScale or ProxySQL)? If so, make sure to use a read-write splitter to avoid writing to more than one node, as this is known for causing deadlocks, as seemed to be the problem in your first crash log that you uploaded to the MariaDB Jira.
– dbdemon
Nov 26 '17 at 21:59
dbdemon, If you add your answer separately I'll mark it solved after a few days with no crashes.
– Alon Oz
Nov 27 '17 at 3:50
So did you have any more crashes?
– dbdemon
Dec 5 '17 at 14:41
|
show 1 more comment
Edit: filed a bug report at https://jira.mariadb.org/browse/MDEV-14493
Mariadb nodes freeze occasionally with the following error in the logs, any clues?
(drupal app, db freezes on clearing application cache)
[Warning] WSREP: Failed to apply app buffer: seqno: 903792, status: 1
Nov 23 21:42:55 websrv4 mysqld[1725]: #011 at
galera/src/trx_handle.cpp:apply():351
Nov 23 21:42:55 websrv4 mysqld[1725]: Retrying 2th time
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[Warning] WSREP: BF applier failed to open_and_lock_tables: 1927, fatal: 0
wsrep = (exec_mode: 1 conflict_state: 5 seqno: 903792)
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[ERROR] Slave SQL: Error executing row event: 'Connection was killed',
Internal MariaDB error code: 1927
mariadb galera multi-master mariadb-10.1
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
Edit: filed a bug report at https://jira.mariadb.org/browse/MDEV-14493
Mariadb nodes freeze occasionally with the following error in the logs, any clues?
(drupal app, db freezes on clearing application cache)
[Warning] WSREP: Failed to apply app buffer: seqno: 903792, status: 1
Nov 23 21:42:55 websrv4 mysqld[1725]: #011 at
galera/src/trx_handle.cpp:apply():351
Nov 23 21:42:55 websrv4 mysqld[1725]: Retrying 2th time
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[Warning] WSREP: BF applier failed to open_and_lock_tables: 1927, fatal: 0
wsrep = (exec_mode: 1 conflict_state: 5 seqno: 903792)
Nov 23 21:42:55 websrv4 mysqld[1725]: 2017-11-23 21:42:55 140081879742208
[ERROR] Slave SQL: Error executing row event: 'Connection was killed',
Internal MariaDB error code: 1927
mariadb galera multi-master mariadb-10.1
mariadb galera multi-master mariadb-10.1
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
edited Nov 24 '17 at 7:21
Alon Oz
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
asked Nov 24 '17 at 5:20
Alon OzAlon Oz
992
992
bumped to the homepage by Community♦ 8 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 8 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Just checking, is your application adhering to the Galera limitations such as the requirement that all tables must have an explicit primary key? From experience, Galera will die if you have a table without a primary key, and then delete data from it. "Clearing application cache" sounds like something that could be deleting rows.
– dbdemon
Nov 26 '17 at 16:21
its drupal so probably yes. and only under load, and only sometimes (almost daily). cache is cleared anyway every 3 hours or less.
– Alon Oz
Nov 26 '17 at 16:32
Is your application configured to access more than one DB node, e.g. through a DB proxy (like MaxScale or ProxySQL)? If so, make sure to use a read-write splitter to avoid writing to more than one node, as this is known for causing deadlocks, as seemed to be the problem in your first crash log that you uploaded to the MariaDB Jira.
– dbdemon
Nov 26 '17 at 21:59
dbdemon, If you add your answer separately I'll mark it solved after a few days with no crashes.
– Alon Oz
Nov 27 '17 at 3:50
So did you have any more crashes?
– dbdemon
Dec 5 '17 at 14:41
|
show 1 more comment
Just checking, is your application adhering to the Galera limitations such as the requirement that all tables must have an explicit primary key? From experience, Galera will die if you have a table without a primary key, and then delete data from it. "Clearing application cache" sounds like something that could be deleting rows.
– dbdemon
Nov 26 '17 at 16:21
its drupal so probably yes. and only under load, and only sometimes (almost daily). cache is cleared anyway every 3 hours or less.
– Alon Oz
Nov 26 '17 at 16:32
Is your application configured to access more than one DB node, e.g. through a DB proxy (like MaxScale or ProxySQL)? If so, make sure to use a read-write splitter to avoid writing to more than one node, as this is known for causing deadlocks, as seemed to be the problem in your first crash log that you uploaded to the MariaDB Jira.
– dbdemon
Nov 26 '17 at 21:59
dbdemon, If you add your answer separately I'll mark it solved after a few days with no crashes.
– Alon Oz
Nov 27 '17 at 3:50
So did you have any more crashes?
– dbdemon
Dec 5 '17 at 14:41
Just checking, is your application adhering to the Galera limitations such as the requirement that all tables must have an explicit primary key? From experience, Galera will die if you have a table without a primary key, and then delete data from it. "Clearing application cache" sounds like something that could be deleting rows.
– dbdemon
Nov 26 '17 at 16:21
Just checking, is your application adhering to the Galera limitations such as the requirement that all tables must have an explicit primary key? From experience, Galera will die if you have a table without a primary key, and then delete data from it. "Clearing application cache" sounds like something that could be deleting rows.
– dbdemon
Nov 26 '17 at 16:21
its drupal so probably yes. and only under load, and only sometimes (almost daily). cache is cleared anyway every 3 hours or less.
– Alon Oz
Nov 26 '17 at 16:32
its drupal so probably yes. and only under load, and only sometimes (almost daily). cache is cleared anyway every 3 hours or less.
– Alon Oz
Nov 26 '17 at 16:32
Is your application configured to access more than one DB node, e.g. through a DB proxy (like MaxScale or ProxySQL)? If so, make sure to use a read-write splitter to avoid writing to more than one node, as this is known for causing deadlocks, as seemed to be the problem in your first crash log that you uploaded to the MariaDB Jira.
– dbdemon
Nov 26 '17 at 21:59
Is your application configured to access more than one DB node, e.g. through a DB proxy (like MaxScale or ProxySQL)? If so, make sure to use a read-write splitter to avoid writing to more than one node, as this is known for causing deadlocks, as seemed to be the problem in your first crash log that you uploaded to the MariaDB Jira.
– dbdemon
Nov 26 '17 at 21:59
dbdemon, If you add your answer separately I'll mark it solved after a few days with no crashes.
– Alon Oz
Nov 27 '17 at 3:50
dbdemon, If you add your answer separately I'll mark it solved after a few days with no crashes.
– Alon Oz
Nov 27 '17 at 3:50
So did you have any more crashes?
– dbdemon
Dec 5 '17 at 14:41
So did you have any more crashes?
– dbdemon
Dec 5 '17 at 14:41
|
show 1 more comment
1 Answer
1
active
oldest
votes
I understand from the comments that your application is writing to more than one DB node. This is known for causing deadlocks, and this appears to be the underlying problem in your first crash log that you uploaded to the MariaDB Jira. If you're using a DB proxy (like MaxScale or ProxySQL), then make sure to use a read-write splitter so you write to only one node, but read from all.
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
add a comment |
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1 Answer
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I understand from the comments that your application is writing to more than one DB node. This is known for causing deadlocks, and this appears to be the underlying problem in your first crash log that you uploaded to the MariaDB Jira. If you're using a DB proxy (like MaxScale or ProxySQL), then make sure to use a read-write splitter so you write to only one node, but read from all.
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
add a comment |
I understand from the comments that your application is writing to more than one DB node. This is known for causing deadlocks, and this appears to be the underlying problem in your first crash log that you uploaded to the MariaDB Jira. If you're using a DB proxy (like MaxScale or ProxySQL), then make sure to use a read-write splitter so you write to only one node, but read from all.
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
add a comment |
I understand from the comments that your application is writing to more than one DB node. This is known for causing deadlocks, and this appears to be the underlying problem in your first crash log that you uploaded to the MariaDB Jira. If you're using a DB proxy (like MaxScale or ProxySQL), then make sure to use a read-write splitter so you write to only one node, but read from all.
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
I understand from the comments that your application is writing to more than one DB node. This is known for causing deadlocks, and this appears to be the underlying problem in your first crash log that you uploaded to the MariaDB Jira. If you're using a DB proxy (like MaxScale or ProxySQL), then make sure to use a read-write splitter so you write to only one node, but read from all.
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
answered Nov 27 '17 at 9:07
dbdemondbdemon
2,8872524
2,8872524
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Just checking, is your application adhering to the Galera limitations such as the requirement that all tables must have an explicit primary key? From experience, Galera will die if you have a table without a primary key, and then delete data from it. "Clearing application cache" sounds like something that could be deleting rows.
– dbdemon
Nov 26 '17 at 16:21
its drupal so probably yes. and only under load, and only sometimes (almost daily). cache is cleared anyway every 3 hours or less.
– Alon Oz
Nov 26 '17 at 16:32
Is your application configured to access more than one DB node, e.g. through a DB proxy (like MaxScale or ProxySQL)? If so, make sure to use a read-write splitter to avoid writing to more than one node, as this is known for causing deadlocks, as seemed to be the problem in your first crash log that you uploaded to the MariaDB Jira.
– dbdemon
Nov 26 '17 at 21:59
dbdemon, If you add your answer separately I'll mark it solved after a few days with no crashes.
– Alon Oz
Nov 27 '17 at 3:50
So did you have any more crashes?
– dbdemon
Dec 5 '17 at 14:41