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https://issues.apache.org/jira/browse/DERBY-3393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kathey Marsden updated DERBY-3393:
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Derby Categories: [Data corruption, High Value Fix] (was: [High Value Fix])
> Database corruption when adding sleep() in RAFContainer4.writePage()
> --------------------------------------------------------------------
>
> Key: DERBY-3393
> URL: https://issues.apache.org/jira/browse/DERBY-3393
> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.2.2.1, 10.3.1.4, 10.4.1.3
> Environment: Solaris 10, OpenSolaris snv_80, Sun Java SE 5.0, Sun
> Java SE 6, Derby trunk #618305
> Reporter: Knut Anders Hatlen
> Priority: Critical
>
> In order to test whether RAFContainer4.writePage() was properly synchronized,
> I made it sleep for 100 ms each time after it had written a page, right
> before it set its needsSync flag to true, like this:
> Index: java/engine/org/apache/derby/impl/store/raw/data/RAFContainer4.java
> ===================================================================
> --- java/engine/org/apache/derby/impl/store/raw/data/RAFContainer4.java
> (revision 618305)
> +++ java/engine/org/apache/derby/impl/store/raw/data/RAFContainer4.java
> (working copy)
> @@ -350,6 +350,11 @@
> dataFactory.writeFinished();
> }
> } else {
> + try {
> + Thread.sleep(100);
> + } catch (InterruptedException ie) {
> + // ignored
> + }
> synchronized(this) {
> needsSync = true;
> }
> When I ran derbyall with this change, I saw some failures in the
> storerecovery suite. I reran the storerecovery suite a couple of times,
> seeing failures each time, although the actual failures varied a bit.
> The most common failure was the following (page numbers and container numbers
> varied):
> > Exception in thread "main" java.sql.SQLException: Failed to start database
> > 'wombat', see the next exception for details.
> > Caused by: java.sql.SQLException: Failed to start database 'wombat', see
> > the next exception for details.
> > ... 17 more
> > Caused by: java.sql.SQLException: Page Page(19,Container(0, 1073)) is at
> > version 0, the log file contains change version 578, either there are log
> > records of this page missing, or this page did not get written out to disk
> > properly.
> > ... 14 more
> > Caused by: ERROR XSDB4: Page Page(19,Container(0, 1073)) is at version 0,
> > the log file contains change version 578, either there are log records of
> > this page missing, or this page did not get written out to disk properly.
> > ... 14 more
> This failure was seen in oc_rec3, oc_rec4, dropcrash and dropcrash2.
> In some cases, I saw this failure in oc_rec3
> > Exception while trying to insert row number: 0
> > ERROR XBCA0: Cannot create new object with key Page(2,Container(0, 1040))
> > in PageCache cache. The object already exists in the cache.
> which would be followed by this error in oc_rec4:
> > ERROR 23505: The statement was aborted because it would have caused a
> > duplicate key value in a unique or primary key constraint or unique index
> > identified by 'TEST1_2_IDX_INDCOL3' defined on 'TEST1_2'.
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