Hi Christian,
I think the cause of the problem was the usage of AutoFlush:false in the import process. The Flush() invoke in longer periods during the process might have been corrupted the state in race conditions.
Restored the db from a backup and restarted the import with AutoFlush:true, this time I got:
Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 9.0.2 beta Java: Oracle Corporation, 1.8.0_151 OS: Linux, amd64 Stack Trace: java.lang.RuntimeException: Key does not exist: '86295d851a084fb2bde4181e80760099' at org.basex.util.Util.notExpected(Util.java:61) at org.basex.index.value.UpdatableDiskValues.delete(UpdatableDiskValues.java:99) at org.basex.data.Data.indexDelete(Data.java:1060) at org.basex.data.Data.delete(Data.java:663) at org.basex.query.up.atomic.Delete.apply(Delete.java:39) at org.basex.query.up.atomic.AtomicUpdateCache.applyUpdates(AtomicUpdateCache.java:296) at org.basex.query.up.atomic.AtomicUpdateCache.execute(AtomicUpdateCache.java:280) at org.basex.query.up.DataUpdates.apply(DataUpdates.java:168) at org.basex.query.up.ContextModifier.apply(ContextModifier.java:120) at org.basex.query.up.Updates.apply(Updates.java:157) at org.basex.query.QueryContext.iter(QueryContext.java:341) at org.basex.query.QueryProcessor.iter(QueryProcessor.java:90) at org.basex.core.cmd.AQuery.query(AQuery.java:92) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:257) at org.basex.core.Command.execute(Command.java:93) at org.basex.server.ClientListener.run(ClientListener.java:140)
On Mon, May 14, 2018 at 4:10 PM, Christian Grün christian.gruen@gmail.com wrote:
Hi Halit,
Thanks for reporting the stack trace. The only thing that I can derive from your error message is that something has gone wrong with your database in an earlier state. Unfortunately, it’s difficult to guess what might have been the reason. Feel free to give us an update if you should manage to get the issue reproduced and reproducible for us.
Best, Christian
On Wed, May 9, 2018 at 4:28 PM, halit tiryaki halit.tiryaki@gmail.com wrote:
I'm using the C# driver. but still, it doesn't look like a high level problem. neither a query problem. thats why I didn't post some code snippets. To make sure, I just tried to execute the INSPECT command in
the
CLI. same exception. Also the db:optimize fails with the same exception, although with a different stacktrace, which I will post below.
Altough the race condition point of two processes interfering is a good point, I'm currently having trouble to do anything useful with a session from which a race condition would matter. If, then it must have happened while the import was running along with the other, non-importing process.
As I mentioned in the first post, while the import process was still ongoing, the other process already started to have the exception at a
very
late progress of the import. After the import was done, I was still able
to
operate on the db as normal, but only with the session in the process
which
did the long-run import.
To restore the second process its session state to normal, I restarted
the
webapplication, which closes both sessions. After that, I'm no longer to operate on the db. Not even directly from the CLI.
Seems it is a sort of a persisted data state which the low level basex
code
can't handle when trying to reread it into to the memory.
I 've already googled around for the same exception in BaseX, seems it
was
an issue in some older versions too.
here the stacktrace when running db:optimize:
Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 9.0.2 beta Java: Oracle Corporation, 1.8.0_151 OS: Linux, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: 52 at org.basex.util.hash.TokenSet.key(TokenSet.java:128) at org.basex.data.Data.name(Data.java:388) at org.basex.io.serial.Serializer.node(Serializer.java:414) at org.basex.io.serial.Serializer.node(Serializer.java:158) at org.basex.io.serial.Serializer.node(Serializer.java:345) at org.basex.io.serial.Serializer.node(Serializer.java:158) at org.basex.io.serial.Serializer.serialize(Serializer.java:109) at org.basex.core.cmd.OptimizeAll$DBParser.parse(OptimizeAll.java:200) at org.basex.build.Builder.parse(Builder.java:77) at org.basex.build.DiskBuilder.build(DiskBuilder.java:77) at org.basex.core.cmd.OptimizeAll.optimizeAll(OptimizeAll.java:122) at org.basex.query.up.primitives.db.DBOptimize.apply(
DBOptimize.java:124)
at org.basex.query.up.DataUpdates.apply(DataUpdates.java:175) at org.basex.query.up.ContextModifier.apply(ContextModifier.java:120) at org.basex.query.up.Updates.apply(Updates.java:157) at org.basex.query.QueryContext.iter(QueryContext.java:341) at org.basex.query.QueryProcessor.iter(QueryProcessor.java:90) at org.basex.core.cmd.AQuery.query(AQuery.java:92) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:257) at org.basex.core.Command.execute(Command.java:93) at org.basex.server.ClientListener.run(ClientListener.java:140)
On Wed, May 9, 2018 at 11:45 AM, Alexander Holupirek alex@holupirek.de wrote:
Hi,
(please also respond to the list. Others might have suggestions as well ;-)
it still would be great if you could provide even more details. For instance, what programming language do you use?Ideally include a Short,
Self
Contained, Correct (Compilable), Example (SSCCE) [1] in order to let
people
reproduce the behaviour.
From a high level perspective, are you sure the sessions do not
interfere?
Do you additionally work with BaseXGUI on the database, while your
program
is importing?
Cheers, Alex
On 9. May 2018, at 09:26, halit tiryaki halit.tiryaki@gmail.com
wrote:
hello, thanks for the fast response.
It happened in the process of a large Import. There were two processes with each a respective Session to BaseX. One process with the Open
session
which did the Import was doing fine. The Second process however
Starter
having the mentioned exception. After stopping Both processes and
restarting
the app, no basex Session is now able to operate normal.
The ArrayIndexOutOfBoundsException already comes in executing the command INSPECT.
The db-Info returns following:
info db: Database Properties NAME: XXX SIZE: 5877 kB NODES: 124051 DOCUMENTS: 5497 BINARIES: 0 TIMESTAMP: 2018-05-09T05:20:44.000Z UPTODATE: false
Resource Properties INPUTPATH: INPUTSIZE: 0 b INPUTDATE: 2018-05-09T04:32:10.539Z
Indexes TEXTINDEX: true ATTRINDEX: true TOKENINDEX: false FTINDEX: false TEXTINCLUDE: /item_User/node()/User:Email ATTRINCLUDE: /item_UserImage/node()/UserImage:Id TOKENINCLUDE: FTINCLUDE: /item_XXX/node()/XXX:[german] LANGUAGE: English STEMMING: false CASESENS: false DIACRITICS: false STOPWORDS: UPDINDEX: true AUTOOPTIMIZE: false MAXCATS: 100 MAXLEN: 96 SPLITSIZE: 0
Alexander Holupirek alex@holupirek.de schrieb am Mi., 9. Mai 2018 08:44: Hi,
could you please provide some more details? The best would be a reproducible example.
Thanks, Alex
On 9. May 2018, at 06:50, halit tiryaki halit.tiryaki@gmail.com wrote:
Hello,
got a serious problem here. any ideas? thanks
Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 9.0.2 beta Java: Oracle Corporation, 1.8.0_151 OS: Linux, amd64 Stack Trace: java.lang.ArrayIndexOutOfBoundsException: 4288 at org.basex.io.random.TableDiskAccess.read1(
TableDiskAccess.java:151)
at org.basex.data.Data.kind(Data.java:294) at org.basex.query.value.node.DBNode$4.next(DBNode.java:332) at org.basex.query.value.node.DBNode$4.next(DBNode.java:323) at org.basex.query.expr.path.IterStep$1.next(IterStep.java:38) at org.basex.query.expr.path.IterStep$1.next(IterStep.java:32) at org.basex.query.QueryContext.next(QueryContext.java:392) at org.basex.query.expr.path.IterPath$1.next(IterPath.java:50) at org.basex.query.expr.path.IterPath$1.next(IterPath.java:34) at org.basex.query.expr.ParseExpr.item(ParseExpr.java:58) at org.basex.query.expr.ParseExpr.atomItem(ParseExpr.java:84) at org.basex.query.func.fn.FnConcat.item(FnConcat.java:20) at org.basex.query.expr.ParseExpr.value(ParseExpr.java:71) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:177) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.expr.path.CachedPath.nodeIter(
CachedPath.java:36)
at org.basex.query.expr.path.AxisPath.iter(AxisPath.java:69) at org.basex.query.expr.gflwor.For$1.next(For.java:107) at org.basex.query.expr.gflwor.OrderBy$1.sort(OrderBy.java:73) at org.basex.query.expr.gflwor.OrderBy$1.next(OrderBy.java:54) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:72) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:177) at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:87) at org.basex.query.QueryContext.next(QueryContext.java:392) at org.basex.query.scope.MainModule$1.next(MainModule.java:122) at org.basex.core.cmd.AQuery.query(AQuery.java:94) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:257) at org.basex.core.Command.execute(Command.java:93) at org.basex.server.ClientListener.run(ClientListener.java:140)