Dear Jason,

As you already indicated by yourself, version 7.9 is a bit older, so it would be interesting if you can reproduce the problem with a newer version. You could additionally try to optimize your database (using OPTIMIZE ALL or db:optimize(..., true()) ) and give us some feedback if the problem persists.

Best,

Christian

Am 10.07.2017 8:49 nachm. schrieb "Jason Ricles" <jgr208@alum.lehigh.edu>:

I am running BaseX 7.9 (yes I know its old but for reasons beyond the scope of this we can't just update BaseX) on RHEL 6.9.

The BaseX is not running any instance as a server but as a standalone application with its libraries being used with my java application.

I am able to add new files to the database, but when I run an XQuery I get the following output:

error running xquery: declare namespace tr = '[query]org.basex.core.BaseXException: Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 7.9
Java: Oracle Corporation, 1.8.0_131
OS: Windows 7, amd64
Stack Trace:
java.lang.RuntimeException: Data Access out of bounds:
- pre value: 5813546
- #used blocks: 22710
- #total locks: 22710
- access: 22709 (22710 > 22709]
at org.basex.util.Util.notExpected(Util.java:53)
at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:508)
at org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:194)
at org.basex.data.Data.kind(Data.java:284)
at org.basex.query.value.node.DBNode$5.next(DBNode.java:353)
at org.basex.query.value.node.DBNode$5.next(DBNode.java:345)
at org.basex.query.path.IterStep$1.next(IterStep.java:39)
at org.basex.query.path.IterStep$1.next(IterStep.java:31)
at org.basex.query.path.MixedPath.iter(MixedPath.java:99)
at org.basex.query.gflwor.GFLWOR$2.next(GFLWOR.java:78)
at org.basex.query.MainModule$1.next(MainModule.java:98)
at org.basex.core.cmd.AQuery.query(AQuery.java:96)
at org.basex.core.cmd.XQuery.run(XQuery.java:22)
at org.basex.core.Command.run(Command.java:329)
at org.basex.core.Command.execute(Command.java:94)
at org.basex.core.Command.execute(Command.java:117)
at basex_debug.Corrupt_DB_Test.queryTestResultsUUID(Corrupt_DB_Test.java:114)
at basex_debug.Corrupt_DB_Test.checkIfAlreadyAdded(Corrupt_DB_Test.java:48)
at basex_debug.Corrupt_DB_Test.addToDatabase(Corrupt_DB_Test.java:64)

           at basex_debug.Corrupt_DB_Test.main(Corrupt_DB_Test.java:23)

The query was running fine before so I know there is not a problem with the query, I have only read about the database getting corrupt with BaseX when ran in Server and Client mode.

What may be causing this problem and what are some possible solutions?