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From "Andrew Clemons (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6137) update/delete statement on table with trigger fails randomly with ERROR XSTA2
Date Sun, 21 Apr 2013 09:55:16 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13637520#comment-13637520
] 

Andrew Clemons commented on DERBY-6137:
---------------------------------------

Hi Rick,
I built the 10.9 branch and ran through my testcases. Everything is green for my tests. Thanks
for the fix!
                
> update/delete statement on table with trigger fails randomly with ERROR XSTA2
> -----------------------------------------------------------------------------
>
>                 Key: DERBY-6137
>                 URL: https://issues.apache.org/jira/browse/DERBY-6137
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.9.1.0, 10.11.0.0
>         Environment: $ java -version
> java version "1.6.0_43"
> Java(TM) SE Runtime Environment (build 1.6.0_43-b01)
> Java HotSpot(TM) 64-Bit Server VM (build 20.14-b01, mixed mode)
> Linux x86_64
>            Reporter: Andrew Clemons
>            Assignee: Rick Hillegas
>         Attachments: derby-6137-01-aa-dontClearSequenceCache.diff, derby-6137-01-ab-dontClearSequenceCache.diff,
derby-6137-02-aa-balanceFindWithRelease.diff, derby-6137.sql, derby_db_identity.log, derby_db.log
>
>
> I have an AFTER DELETE trigger on an exchange rate table which inserts data into a history
table. It uses a sequence for the key in the history table.
> Simplified it looks like this:
> CREATE TRIGGER TRG_EXCHANGE_RATES_HIST_DEL
> AFTER DELETE ON EXCHANGE_RATES
> REFERENCING OLD ROW AS OLD
> FOR EACH ROW
>  INSERT INTO EXCHANGE_RATE_HISTORY (ID_HISTORY, CUR_FROM, AMNT_FROM, CUR_TO, AMNT_TO,
AMNT_RATE, DAT_CREATION)
>    VALUES (( NEXT VALUE for HIST_SEQ ), OLD.CUR_FROM, OLD.AMNT_FROM, OLD.CUR_TO, OLD.AMNT_TO,
OLD.AMNT_RATE, CURRENT_TIMESTAMP);
> The sequence is defined as:
> create sequence HIST_SEQ
> increment by 1
> start with 10000001
>  no maxvalue
>  minvalue 10000001
> no cycle;
> Randomly when deleting data the statement will fail with:
> ERROR XSTA2: A transaction was already active, when attempt was made to make another
transaction active.
> I will attach the full stack trace. It looks like the sequence cache needs to be cleared
which causes a nested user transaction to start. But my delete statement is already running
as part of a transaction (non XA - spring managed - hibernate).
> We do not have this exception when testing with derby 10.8.2.2.
> I get the same exception after building and running the latest trunk version (revision
1463340, Bundle-Version: 10.11.0000000.1463340)
> To rule out the sequence on the history table, I switched it to use a generated column
(GENERATED ALWAYS AS IDENTITY (START WITH 10000001, INCREMENT BY 1)) but I still randomly
get the exception.
> All tables in the application use sequences for their primary keys (through Hibernate's
SequenceHiLoGenerator) so it seems to be possibly related to that.

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