Strange Exception

18 Aug 2016


      Hello,
I have a strange exception :
Improper use? Potential bug? Your feedback is welcome:
  Contact: basex-talk@mailman.uni-konstanz.de
  Version: BaseX 8.2.3
  Java: Oracle Corporation, 1.8.0_91
  OS: Linux, amd64
  Stack Trace:
  java.lang.RuntimeException: Data Access out of bounds:
  - pre value: 120241192
  - #used blocks: 469694
  - #total locks: 469770
  - access: 469693 (469694 > 469693]
          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.expr.gflwor.For$1.next(For.java:79)
          at org.basex.query.expr.gflwor.GroupBy$1.init(GroupBy.java:131)
          at org.basex.query.expr.gflwor.GroupBy$1.next(GroupBy.java:98)
          at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:174)
          at org.basex.query.expr.gflwor.For$1.next(For.java:99)
          at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:95)
          at org.basex.query.expr.List$1.next(List.java:135)
          at org.basex.query.MainModule.cache(MainModule.java:91)
          at org.basex.query.QueryContext.iter(QueryContext.java:352)
          at org.basex.query.QueryProcessor.iter(QueryProcessor.java:80)
          at org.basex.core.cmd.AQuery.query(AQuery.java:89)
          at org.basex.core.cmd.XQuery.run(XQuery.java:22)
          at org.basex.core.Command.run(Command.java:398)
          at org.basex.core.Command.execute(Command.java:100)
          at org.basex.server.ClientListener.run(ClientListener.java:136)
The XQuery is :
for $fs in collection('FichiersBase')/forms
group by $s := $fs/@supp
return
   let $mv := max($fs/@omversion)
   for $f in $fs
   return
     if (empty($mv) or $f/@omversion >= $mv)
     then
       ()
     else
       db:delete('FichiersBase', db:path($f))
),
db:optimize('FichiersBase')
After this, trying a OPTIMIZE ALL on DATABASE FichiersBase, I have this 
exception :
...
OPEN FichiersBase
Database 'FichiersBase' was opened in 744.68 ms.
...
OPTIMIZE ALL
Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 8.2.3
Java: Oracle Corporation, 1.8.0_91
OS: Linux, amd64
Stack Trace:
java.lang.ArrayIndexOutOfBoundsException: 1
     at org.basex.data.Namespaces.values(Namespaces.java:201)
     at org.basex.data.Data.namespaces(Data.java:450)
     at org.basex.io.serial.Serializer.node(Serializer.java:449)
     at org.basex.io.serial.Serializer.node(Serializer.java:176)
     at org.basex.io.serial.Serializer.serialize(Serializer.java:126)
     at org.basex.core.cmd.OptimizeAll$DBParser.parse(OptimizeAll.java:202)
     at org.basex.build.Builder.parse(Builder.java:73)
     at org.basex.build.DiskBuilder.build(DiskBuilder.java:85)
     at org.basex.core.cmd.OptimizeAll.optimizeAll(OptimizeAll.java:131)
     at org.basex.core.cmd.OptimizeAll.run(OptimizeAll.java:47)
     at org.basex.core.Command.run(Command.java:398)
     at org.basex.core.Command.execute(Command.java:100)
     at org.basex.server.ClientListener.run(ClientListener.java:136)
Any idea ?
Does this mean my database is corrupted ?
Best,
Christophe

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