Re: [basex-talk] BaseX update persistence

6 Aug 2013

      Hi Chris,

this *definitely* shouldn't happen.

Could you try two things please:

1. Try with [BaseX 7.7 Beta] (close to release anyway) - we changed quite a bit with the logging, so chances are good that bug is gone anyway. As you're using BaseX as a jar, it should be a drop-in replacement.
2. Send me a complete example of the bug which I can execute (eg., including the `SESSION` declaration), so I can see what the problem was, anyway (and if it somehow could persist to the new version).

Regards,
Jens

[BaseX 7.7 Beta]: http://files.basex.org/releases/latest/

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Jens Erat

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Am 06.08.2013 um 10:36 schrieb <ext-christopher.harper@nokia.com>:
...
Hi @ll,
Re-sending from different address due to original message disappearing.
When running BaseX as a server and connecting to it my update statements are successful but when using BaseX from a jar inside the JVM – Database creation works fine – the update statements don't get committed – not visible to other clients or after restart – to the database.
Select queries work fine.
Code that – no exception – fails is:
final String xQueryUpdate = String.format("for $tab in doc('db')//tabs/tab[@id='%s'] return replace node $tab/content with %s", tabId, value); //$NON-NLS-1$
try {
      synchronized (SESSION) {
            new ClientQuery(xQueryUpdate, SESSION, SESSION.getOutputStream()).close();
            // System.out.println(new XQuery(xQueryUpdate).execute(CONTEXT));
            SESSION.notify();
      }
} catch (final IOException ioex) {
      ioex.printStackTrace();
}
When trying to use XQuery - In comment – I get:
org.basex.core.BaseXException: Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 7.6
Java: Oracle Corporation, 1.7.0_10-ea
OS: Mac OS X, x86_64
Stack Trace: 
java.nio.channels.OverlappingFileLockException
  sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255)
  sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152)
What might be the issue or have I misunderstood something?
/ Chris
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