Hi Philippe,

I remember we’ve fixed a bug like this 2, 3 years ago. BaseX 9.2.1 is
pretty old now; do you have a chance to upgrade to BaseX 10.4 or at
least BaseX 9.6.4?

I guess the problem should disappear if you run OPTIMIZE ALL or
db:optimize(..., true()) and switch to the new version.

Hope this helps, cordiales salutations,
Christian


On Tue, Dec 13, 2022 at 11:04 AM Philippe Pons
<philippe.pons@college-de-france.fr> wrote:
>
> Hi all,
>
> I tried to replace a database in the BaseX Database Administration (dba). A simple task that I often do.
> But this time, I get this message:
>
>
> Unexpected error: Improper use? Potential bug? Your feedback is welcome:
> Contact: basex-talk@mailman.uni-konstanz.de
> Version: BaseX 9.2.1
> Java: Oracle Corporation, 1.8.0_231
> OS: Linux, amd64
> Stack Trace:
> java.lang.ArrayIndexOutOfBoundsException: 1
> at org.basex.io.random.TableDiskAccess.fpre(TableDiskAccess.java:507)
> at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:468)
> at org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:156)
> at org.basex.data.Data.kind(Data.java:304)
> at org.basex.query.value.node.DBNode.<init>(DBNode.java:50)
> at org.basex.query.value.seq.DBNodeSeq.get(DBNodeSeq.java:139)
> at org.basex.query.value.seq.DBNodeSeq.get(DBNodeSeq.java:164)
> at org.basex.query.func.db.DbOpen.value(DbOpen.java:19)
> at org.basex.query.func.StandardFunc.optimize(StandardFunc.java:82)
> at org.basex.query.expr.Arr.compile(Arr.java:43)
> at org.basex.query.expr.path.Path.compile(Path.java:129)
> at org.basex.query.expr.If.compile(If.java:58)
> at org.basex.query.func.StaticFunc.comp(StaticFunc.java:69)
> at org.basex.query.QueryCompiler.compile(QueryCompiler.java:114)
> at org.basex.query.QueryCompiler.compile(QueryCompiler.java:105)
> at org.basex.query.QueryContext.compile(QueryContext.java:312)
> at org.basex.query.QueryContext.iter(QueryContext.java:331)
> at org.basex.http.restxq.RestXqResponse.serialize(RestXqResponse.java:73)
> at org.basex.http.web.WebResponse.create(WebResponse.java:56)
> at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:54)
> at org.basex.http.BaseXServlet.service(BaseXServlet.java:62)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
> at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865)
> at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
> at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
> at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1700)
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
> at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
> at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
> at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1667)
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
> at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
> at org.eclipse.jetty.server.Server.handle(Server.java:505)
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
> at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
> at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
> at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
> at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
> at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
> at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
> at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
> at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
> at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:786)
> at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:743)
> at java.lang.Thread.run(Thread.java:748)
>
>
>
> Could you help me to find a solution?
>
> Many thanks,
> Philippe