Hello, 

So, now I am stuck. I am not even able to access any database:

ubuntu@ip-10-0-0-83:~$ basex
BaseX 8.2.3 [Standalone]
Try help to get more information.

> list
Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 8.2.3
Java: Oracle Corporation, 1.7.0_95
OS: Linux, amd64
Stack Trace: 
java.lang.ArrayIndexOutOfBoundsException: 0
at org.basex.util.Version.<init>(Version.java:33)
at org.basex.util.Version.<init>(Version.java:24)
at org.basex.data.MetaData.read(MetaData.java:315)
at org.basex.data.MetaData.read(MetaData.java:262)
at org.basex.core.cmd.List.list(List.java:83)
at org.basex.core.cmd.List.run(List.java:52)
at org.basex.core.Command.run(Command.java:398)
at org.basex.core.Command.execute(Command.java:100)
at org.basex.api.client.LocalSession.execute(LocalSession.java:132)
at org.basex.api.client.Session.execute(Session.java:36)
at org.basex.core.CLI.execute(CLI.java:103)
at org.basex.core.CLI.execute(CLI.java:87)
at org.basex.BaseX.console(BaseX.java:191)
at org.basex.BaseX.<init>(BaseX.java:166)
at org.basex.BaseX.main(BaseX.java:42)

> 


On Tue, Apr 26, 2016 at 12:14 PM, Christian Grün <christian.gruen@gmail.com> wrote:
Hi Mansi,

Thanks for the feedback. Errors like this sometime occur if databases
are requested from different JVMs at the same time. See e.g. [1] for
more information.

Cheers
Christian

[1] http://docs.basex.org/wiki/Startup#Concurrent_Operations


On Tue, Apr 26, 2016 at 6:02 PM, Mansi Sheth <mansi.sheth@gmail.com> wrote:
> I did try the inspect command on all databases, which should there are no
> inconsistencies.I was logging any exceptions, in my java code, in case of
> errors, and that showed me, which database in particular was in problem,
> dropping it helped.
>
> This was the first time I saw it. I was worried, DB has grown till the point
> of not being supported, when I actually panicked.
>
> Thanks,
> - Mansi
>
> On Tue, Apr 26, 2016 at 3:27 AM, Christian Grün <christian.gruen@gmail.com>
> wrote:
>>
>> Dear Mansi,
>>
>> you could try to run the INSPECT command on the affected database, or all
>> databases, in order to find out if your database has gone corrupt. Did you
>> repeatedly come across this error?
>>
>> Best,
>> Christian
>>
>> Am 25.04.2016 16:45 schrieb "Mansi Sheth" <mansi.sheth@gmail.com>:
>> >
>> > Hello,
>> >
>> > My current BaseXDB is at 920GB, with ~230 databases... I run jetty
>> > server visa basexhttp script with giving it explicit 30GB of RAM. While
>> > trying to access a query, thru REST api via XQUERY, I get below error.
>> >
>> > HTTP/1.1 400 Bad Request^M
>> > Content-Type: text/plain;charset=UTF-8^M
>> > Content-Length: 4207^M
>> > Server: Jetty(8.1.16.v20140903)^M
>> > ^M
>> > Improper use? Potential bug? Your feedback is welcome:
>> > Contact: basex-talk@mailman.uni-konstanz.de
>> > Version: BaseX 8.2.3
>> > Java: Oracle Corporation, 1.7.0_95
>> > OS: Linux, amd64
>> > Stack Trace:
>> > java.lang.RuntimeException: Data Access out of bounds:
>> > - pre value: 126882320
>> > - #used blocks: 495643
>> > - #total locks: 495643
>> > - access: 495642 (495643 > 495642]
>> >         at org.basex.util.Util.notExpected(Util.java:60)
>> >         at
>> > org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:458)
>> >         at
>> > org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:148)
>> >         at org.basex.data.Data.kind(Data.java:306)
>> >         at org.basex.query.value.node.DBNode.<init>(DBNode.java:51)
>> >         at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:68)
>> >         at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:22)
>> >         at org.basex.query.value.seq.Seq$1.next(Seq.java:77)
>> >         at org.basex.query.expr.path.IterPath$1.next(IterPath.java:58)
>> >         at org.basex.query.expr.path.IterPath$1.next(IterPath.java:36)
>> >         at org.basex.query.MainModule$1.next(MainModule.java:114)
>> >         at
>> > org.basex.query.func.StandardFunc.cache(StandardFunc.java:384)
>> >         at
>> > org.basex.query.func.xquery.XQueryEval.eval(XQueryEval.java:129)
>> >         at
>> > org.basex.query.func.xquery.XQueryEval.eval(XQueryEval.java:59)
>> >         at
>> > org.basex.query.func.xquery.XQueryEval.value(XQueryEval.java:49)
>> >         at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:77)
>> >         at org.basex.query.QueryContext.value(QueryContext.java:421)
>> >         at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:187)
>> >         at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:95)
>> >         at org.basex.query.MainModule$1.next(MainModule.java:114)
>> >         at org.basex.core.cmd.AQuery.query(AQuery.java:91)
>> >         at org.basex.core.cmd.XQuery.run(XQuery.java:22)
>> >         at org.basex.core.Command.run(Command.java:398)
>> >         at org.basex.http.rest.RESTCmd.run(RESTCmd.java:99)
>> >         at org.basex.http.rest.RESTQuery.query(RESTQuery.java:74)
>> >         at org.basex.http.rest.RESTRun.run0(RESTRun.java:41)
>> >         at org.basex.http.rest.RESTCmd.run(RESTCmd.java:65)
>> >         at org.basex.core.Command.run(Command.java:398)
>> >         at org.basex.core.Command.execute(Command.java:100)
>> >         at org.basex.core.Command.execute(Command.java:123)
>> >         at org.basex.http.rest.RESTServlet.run(RESTServlet.java:22)
>> >         at org.basex.http.BaseXServlet.service(BaseXServlet.java:64)
>> >         at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> >         at
>> > org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
>> >         at
>> > org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
>> >         at
>> > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
>> >         at
>> > org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
>> >         at
>> > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
>> >         at
>> > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
>> >         at
>> > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
>> >         at
>> > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
>> >         at
>> > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
>> >         at
>> > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
>> >         at
>> > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
>> >         at org.eclipse.jetty.server.Server.handle(Server.java:370)
>> >         at
>> > org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
>> >         at
>> > org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
>> >         at
>> > org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
>> >         at
>> > org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
>> >         at
>> > org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
>> >         at
>> > org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
>> >         at
>> > org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
>> >         at
>> > org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
>> >         at
>> > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
>> >         at
>> > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
>> >         at java.lang.Thread.run(Thread.java:745)
>> >
>> >
>> > --
>> > - Mansi
>
>
>
>
> --
> - Mansi



--
- Mansi