Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Won't Fix
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10.2
Description
I get complete table deadlock with simple test case like below:
1. setup default two-node galera cluster on the same host, e.g. on ports 3314 and 3315
2. Create table:
create table test.t select 1;
3. Start following concurrent load:
( for i1 in {1..100000} ; do mysql -h127.0.0.1 -P3314 -e "insert into t select $i1" test || : ; done ) &> /dev/null & |
( for i1 in {1..100000} ; do mysql -h127.0.0.1 -P3315 -e "insert into t select $i1" test || : ; done ) &> /dev/null & |
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( for k1 in {1..1000}; do sleep 10; mysql -h127.0.0.1 -P3314 -e "optimize table t" test & wait ; done ) &>/dev/null & |
( for k1 in {1..1000}; do sleep 10; mysql -h127.0.0.1 -P3315 -e "optimize table t" test & wait ; done ) &>/dev/null & |
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while true ; do |
mysql -h127.0.0.1 -P3314 -e 'show processlist' |
mysql -h127.0.0.1 -P3315 -e 'show processlist' |
mysql -h127.0.0.1 -P3314 -e 'select count(*) from t' test |
mysql -h127.0.0.1 -P3315 -e 'select count(*) from t' test |
sleep 2 |
done |
The cluster usually hangs up within 1 min, this is what observed:
(11:17 sql) > mysql -h 127.0.0.1 -P 3314 -uroot -e 'show processlist'
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+-----+-------------+-----------------+------+---------+------+-------------------------+--------------------------+----------+
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| Id | User | Host | db | Command | Time | State | Info | Progress |
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+-----+-------------+-----------------+------+---------+------+-------------------------+--------------------------+----------+
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| 1 | system user | | test | Sleep | 748 | Waiting for table flush | optimize table t | 0.000 |
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| 2 | system user | | NULL | Sleep | 815 | wsrep aborter idle | NULL | 0.000 |
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| 518 | a | localhost:37078 | test | Query | 748 | query end | insert into t select 487 | 0.000 |
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| 519 | a | localhost:37080 | test | Query | 748 | Waiting for table flush | select count(*) from t | 0.000 |
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| 520 | a | localhost:37122 | test | Query | 738 | checking permissions | optimize table t | 0.000 |
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| 526 | root | localhost:38382 | NULL | Query | 0 | init | show processlist | 0.000 |
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+-----+-------------+-----------------+------+---------+------+-------------------------+--------------------------+----------+
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(11:17 sql) > mysql -h 127.0.0.1 -P 3315 -uroot -e 'show processlist'
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+-----+-------------+-----------------+------+---------+------+----------------------+--------------------------+----------+
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| Id | User | Host | db | Command | Time | State | Info | Progress |
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+-----+-------------+-----------------+------+---------+------+----------------------+--------------------------+----------+
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| 1 | system user | | NULL | Sleep | 799 | wsrep aborter idle | NULL | 0.000 |
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| 2 | system user | | NULL | Sleep | 748 | committed 992 | NULL | 0.000 |
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| 517 | a | localhost:46558 | test | Query | 748 | query end | insert into t select 505 | 0.000 |
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| 518 | a | localhost:46562 | test | Query | 738 | checking permissions | optimize table t | 0.000 |
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| 524 | root | localhost:47822 | NULL | Query | 0 | init | show processlist | 0.000 |
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+-----+-------------+-----------------+------+---------+------+----------------------+--------------------------+----------+
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It is kid of strange to me that I cannot reproduce the problem with alter command below instead of OPTIMIZE:
alter table t engine=innodb, algorithm=copy
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- Closed
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