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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4440) Intermittent Java deadlock when running LobStreamsTest with insane jars
Date Tue, 10 Nov 2009 12:56:28 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan updated DERBY-4440:
-----------------------------------

    Attachment: java-deadlock.txt

Attached thread dump.

> Intermittent Java deadlock when running LobStreamsTest with insane jars
> -----------------------------------------------------------------------
>
>                 Key: DERBY-4440
>                 URL: https://issues.apache.org/jira/browse/DERBY-4440
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.6.0.0
>         Environment: Dual core CPU at 3.2 GHz, OpenSolaris, Java HotSpot(TM) Client VM
(14.1-b02 mixed mode)
>            Reporter: Kristian Waagan
>         Attachments: java-deadlock.txt
>
>
> The following deadlock was obtained by using jstack when the test LobStreamsTest hung:
> Found one Java-level deadlock:
> =============================
> "Finalizer":
>   waiting to lock monitor 0x080f2038 (object 0xceb8ef08, a org.apache.derby.impl.store.raw.data.StoredPage),
>   which is held by "main"
> "main":
>   waiting to lock monitor 0x082b5ef8 (object 0xceb98fe8, a org.apache.derby.impl.store.raw.data.BaseContainerHandle),
>   which is held by "Finalizer" 
> The deadlock is highly intermittent. In many cases the test pass, and when it fails it
is mostly with a different symptom than a deadlock (assert error or an IOException / SQLException).
> The problems seem to be triggered by using Clobs, but I don't know if it may be triggered
in other environments as well.
> It is likely that DERBY-3844 describes the assert caused by the same underlying issue.

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