Deadlock on system tables
-------------------------
Key: DERBY-4302
URL: https://issues.apache.org/jira/browse/DERBY-4302
Project: Derby
Issue Type: Bug
Components: Store
Reporter: Egidijus
Using 3d part libraries which uses embedded Derby DB, I got following stack
trace which shows that deadlock appears between *system* tables (unfortunately
there are no code to reproduce). Connecting without auto commit and DB is used
by two users:
Lock : TABLE, SYSCOLUMNS, Tablelock
Waiting XID : {9404, IS} , APP, SELECT cdo_version, cdo_created,
cdo_revised, cdo_resource, cdo_container, cdo_feature, name, id FROM
core_File WHERE cdo_id= ? AND (cdo_revised = 0 )
Granted XID : {7351, IX}
Lock : ROW, SYSTABLES, (2,14)
Waiting XID : {7351, X} , APP, CREATE TABLE core_File (cdo_id BIGINT
NOT NULL, cdo_version INTEGER NOT NULL, cdo_class BIGINT NOT NULL,
cdo_created BIGINT NOT NULL, cdo_revised BIGINT NOT NULL, cdo_resource
BIGINT NOT NULL, cdo_container BIGINT NOT NULL, cdo_feature INTEGER
NOT NULL, name VARCHAR(32672), id VARCHAR(32672))
Granted XID : {9404, S}
. The selected victim is XID : 9404.
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