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Posted to derby-dev@db.apache.org by "Dag H. Wanvik (JIRA)" <ji...@apache.org> on 2009/09/01 00:01:35 UTC
[jira] Updated: (DERBY-151) Thread termination -> XSDG after
operation is 'complete'
[ https://issues.apache.org/jira/browse/DERBY-151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dag H. Wanvik updated DERBY-151:
--------------------------------
Attachment: derby-151-b.stat
derby-151-b.diff
Uploading version "b" of this patch.
- Changed severity to database; updated ErrorCodeTest to reflect this.
Rationale: It seems right - I don't know that it's safe to continue
after this kind of error, and I compared to other IO level errors in
raw store and mostly seem to have database severity.
- Made the new Derby151Test not fail even if expected error is not
seen. I did this to allow for possible different behavior on other
VMs, JUnit verbose mode would instead print "Not able to test fix
for DERBY-151: No interrupt seen".
- I added the same handling to read (even if not seen yet) as for
write. Regressions passed modulo ErrorCodeTest, which i missed
first time around.
- Fixed some broken Javadocs.
Ready for review.
> 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
> Attachments: d151.java, derby-151-a.diff, derby-151-a.stat, derby-151-b.diff, derby-151-b.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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