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From "Florin Herinean (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4863) Derby update operation does not timeout until the locks are released.
Date Thu, 21 Oct 2010 10:29:15 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4863?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Florin Herinean updated DERBY-4863:
-----------------------------------

    Attachment: StatementTimeout.java

sample program to reproduce the issue.

> Derby update operation does not timeout until the locks are released.
> ---------------------------------------------------------------------
>
>                 Key: DERBY-4863
>                 URL: https://issues.apache.org/jira/browse/DERBY-4863
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.6.2.1
>         Environment: windows 7, jdk 1.5.0_22, derby 10.6.2.1
>            Reporter: Florin Herinean
>         Attachments: StatementTimeout.java
>
>
> Derby update statements do not timeout until the (write) locks are released.
> The scenario involves 2 threads starting 2 separate transactions/connections, each of
them attempting to update the same row. The first thread starts the transaction, locks the
row (via update) then waits 40 seconds. The second thread is started 5 seconds later and it
has a 5 seconds timeout set on the statement. Upon attempting to update the same row as the
first thread, it times out after 35 seconds (40 - 5) and not after the expected 5 seconds
as specified in the statement timeout.
> A test case is attached.
> Oracle and DB2 behaves as expected.

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