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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4314) With derby client setTransactionIsolation executes and commits even if isolation has not changed
Date Fri, 30 Apr 2010 14:42:05 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan updated DERBY-4314:
-----------------------------------

    Attachment: derby-4314-6d-handle_xa.diff

Attached patch 6d, which is a combined patch with some additional XA changes in the client.

Can someone with more knowledge about XA have a look?
Briefly described, I have made the client *not* reset the isolation level when we are doing
a join or resume. Instead, we pick up the piggy-backed value from the server. The server,
I believe, is keeping track of the correct value for the isolation level (?).

The full regression tests are running, I verified that the tests that failed with the previous
patch(es) passed.

> With derby client setTransactionIsolation executes and commits even if isolation has
not changed 
> -------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4314
>                 URL: https://issues.apache.org/jira/browse/DERBY-4314
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC, Network Client
>    Affects Versions: 10.1.3.1, 10.2.2.0, 10.3.3.0, 10.4.2.0, 10.5.1.1, 10.6.1.0
>            Reporter: Kathey Marsden
>            Priority: Minor
>         Attachments: DERBY-4314-2.diff, DERBY-4314-3.diff, DERBY-4314-5.diff, derby-4314-6a-initial_piggybacking.diff,
derby-4314-6a-initial_piggybacking.stat, DERBY-4314-6b-combinepiggybacking.diff, DERBY-4314-6c-combineaftermerge.diff,
derby-4314-6d-handle_xa.diff, DERBY-4314.diff, ReproIsoLost.java, TestConnReuse.java, utilXid.java
>
>
> With in EmbedConnection.setIsolation() we have a check to see if the isolation level
is the same and if so just return without doing a commit:
>   public void setTransactionIsolation(int level) throws SQLException {
> 		if (level == getTransactionIsolation())
> 			return;
> with org.apache.derby.client.am.Connection we have no such check. It would be good if
the client driver acted like embedded.

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