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https://issues.apache.org/jira/browse/DERBY-151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dag H. Wanvik updated DERBY-151:
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Attachment: derby-151-c.stat
derby-151-c.diff
Luckily this turned out to be a red herring, the shutting down does see errors fail since the channel
has been closed, but the correct database level exception is returned to the app (XSDG9), and
rebooting+recovery works as expected.
This will be seen on derby.log when the shutdown sees the closed channel:
ERROR XSDG9: Derby thread received an interrupt during a disk I/O operation, please check your application for the source of the interrupt.
:
------------ BEGIN SHUTDOWN ERROR STACK -------------
ERROR XSDG1: Page Page(1,Container(0, 1120)) could not be written to disk, please check if disk is full.
:
Caused by: java.nio.channels.ClosedChannelException
Uploading derby-151-c, which fixes a bug in the test; it asserted for the wrong SQL state. However, assertSQLState is
a bit broken; if it can't match on the top level SQL state, it goes down the chain to see if it can match a wrapped exception.
When that fails, it gives up and reports that it found *the innermost* wrapped exception, whereas the application saw the outermost one,
causing me to suspect the code fix was wrong.
Running regressions.
> Thread termination -> XSDG after operation is 'complete'
> --------------------------------------------------------
>
> Key: DERBY-151
> URL:
https://issues.apache.org/jira/browse/DERBY-151> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.0.2.1
> Environment: Linux kernel 2.4.21-243-athlon (SuSE 9.0)
> Reporter: Barnet Wagman
> Assignee: Dag H. Wanvik
> Attachments: d151.java, derby-151-a.diff, derby-151-a.stat, derby-151-b.diff, derby-151-b.stat, derby-151-c.diff, derby-151-c.stat, derby.log, Derby151Test.java
>
>
> I've encountered what appears to be a bug related to threading. After an INSERT operation, if the invoking thread terminates too quickly, Derby throws an XSDG.
> The bug is a bit difficult to isolate but it occurs consistently in the following situation (with a particular database and an operation of a particular size):
> Derby is running in embedded mode with autocommit on.
> The application performs an INPUT operation from a thread that is not the main thread. The INPUT is issued using a PreparedStatement. The INPUT adds ~ 256 records of six fields each. (Note that INSERTs of this size seem to work fine in other contexts.)
>
> The preparedStatement.executeUpdate() seems to excute successfully; at least it returns without throwing an exception.
> The thread that invoked the INPUT operation then terminates (but NOT the application). The next INPUT operation then results in an
> "ERROR XSDG1: Page Page(7,Container(0, 1344)) could not be written to disk, please check if disk is full."
> The disk is definitely not full.
> HOWEVER, if I put the calling thread to sleep for a second before it exits, the problem does not occur.
> I'm not quite sure what to make of this. I was under the impression that most of Derby's activity occurs in the application's threads. Could Derby be creating a child thread from in the application thread, which dies when the parent thread terminates?
> Thanks
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