[DERBY-1189] latch self deadlock when running inplace compress

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.1.1.0, 10.1.2.1, 10.1.3.1, 10.2.1.6
• Fix Version/s: 10.1.3.1, 10.2.1.6
• Component/s: Store
• Assignee: Mike Matrigali
• Reporter: Mike Matrigali
• Created: 07/Apr/06 07:40
• Updated: 12/Jul/06 03:24
• Resolved: 08/Apr/06 00:27

Description

The following script , before the fix, causes online compress to attempt to latch the same page twice in a nested user transaction causing a self deadlock of the form:
ij> CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);
ERROR 40001: A lock could not be obtained due to a deadlock, cycle of locks and
waiters is:
Lock : LATCH, T1, Page(35,Container(0, 1728))
Waiting XID :

{385920, BaseContainerHandle:(Container(0, 1728))}

, APP, CALL S
YSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1)
Granted XID :

{385920, BaseContainerHandle:(Container(0, 1728))}

. The selected victim is XID : 385920.

script that reproduces it:
drop table t1;
create table t1 (i integer primary key, j integer, c char(200));
insert into t1 values (1, 1, 'a');
insert into t1 (select t1.i + 2, t1.j + 2, t1.c from t1);
insert into t1 (select t1.i + 4, t1.j + 4, t1.c from t1);
insert into t1 (select t1.i + 8, t1.j + 8, t1.c from t1);
insert into t1 (select t1.i + 16, t1.j + 16, t1.c from t1);
insert into t1 (select t1.i + 32, t1.j + 32, t1.c from t1);
insert into t1 (select t1.i + 64, t1.j + 64, t1.c from t1);
insert into t1 (select t1.i + 128, t1.j + 128, t1.c from t1);
insert into t1 (select t1.i + 256, t1.j + 256, t1.c from t1);
insert into t1 (select t1.i + 512, t1.j + 512, t1.c from t1);
insert into t1 (select t1.i + 1024, t1.j + 1024, t1.c from t1);

delete from t1 where j=1;

CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);

delete from t1 where j=2;

CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);

delete from t1 where i > 1024;

CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);

delete from t1 where i < 512;

CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('APP', 'T1', 1, 1, 1);