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From "Kathey Marsden (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-414) Client XA has a problem with the TRANSACTION_READ_UNCOMMITTED isolation level
Date Wed, 29 Jun 2005 22:42:59 GMT
     [ http://issues.apache.org/jira/browse/DERBY-414?page=all ]

Kathey Marsden updated DERBY-414:
---------------------------------

    Attachment: deby414Repro.zip

run repro as
java TestDerbyNSXA


> Client XA has a problem with the TRANSACTION_READ_UNCOMMITTED isolation level
> -----------------------------------------------------------------------------
>
>          Key: DERBY-414
>          URL: http://issues.apache.org/jira/browse/DERBY-414
>      Project: Derby
>         Type: Bug
>   Components: Network Client
>     Versions: 10.1.1.0, 10.2.0.0
>     Reporter: Kathey Marsden
>  Attachments: deby414Repro.zip
>
> When using v10.1.1.0 of the Apache Derby Network Client JDBC Driver and configuring
> the TRANSACTION_READ_UNCOMMITTED isolation level, it is unable to read changes from another
transaction which haven't been committed yet. 
> $ java TestDerbyNSXA
> Connection number: 2.
> Database product: Apache Derby
> Database version: 10.2.0.0 alpha
> Driver name:      Apache Derby Network Client JDBC Driver
> Driver version:   10.2.0.0 alpha
> Thread 1: transaction started (with read committed isolation)
> Thread 1: row updated first time.
> Connection number: 3.
> Thread 2: transaction started (with read uncommitted isolation)
> Query complete on thread 2. About to do ResultSet.next()...
> Thread 1: row updated second time.
> ResultSet.next() took 19067 milliseconds.
> Test fails. ResultSet next under read uncommitted isolation appears to have been blocked
and unable to perform a dirty read.
> Thread 1: transaction committed.
> Thread 2: transaction committed.
> $

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