BaseX-Talk December 2011

basex-talk@mailman.uni-konstanz.de

29 participants
46 discussions

Out of memory bug
by Ivan Lagunov 31 Jul '13

31 Jul '13

Hello, I've got 'Out of memory' error and corrupted database again, this time it's for 6.3 version. Steps: 1. Started server, started terminal client, checked there are no text and attribute indexes. 2. Started my Java application that runs several tests on database: querying, adding, removing. 3. Then I forgot to reopen terminal client and used the one that I opened in Step 1. 4. Run optimize command for the collection and got error. 5. Cannot open the collection any more as I'm getting 'Out of memory'. It's clear that I shouldn't have used the terminal client that I opened before execution of my Java application. But sometimes it's hard to remember. And it's completely unacceptable that these actions result in the corrupted database. You really should catch ArrayIndexOutOfBoundsException everywhere in order to save database from being corrupted. Terminal client stacktrace: > optimize Possible bug? Feedback is welcome: basex-talk(a)mailman.uni-konstanz.de BaseX 6.3: java.lang.ArrayIndexOutOfBoundsException: -1 org.basex.data.PathSummary.add(PathSummary.java:68) org.basex.core.cmd.Optimize.stats(Optimize.java:68) org.basex.core.cmd.Optimize.run(Optimize.java:34) org.basex.core.Command.run(Command.java:236) org.basex.core.Command.exec(Command.java:218) org.basex.core.Command.execute(Command.java:66) org.basex.server.ServerProcess.run(ServerProcess.java:161) > open products Out of Main Memory. Best regards, Ivan

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Empty Initial Document Inconsistencies
by Dave Glick 05 Jul '12

05 Jul '12

Hello again, I've noticed some inconsistencies with regard to the initial document in an empty database. I understand that it is often treated as an indication that the database is "empty". I.e., if the database has only one node and it's a document at the first pre value, then Data.empty() returns true. The problem arises because the database isn't actually empty - it contains one empty document - and some commands/methods view it as an empty database while others treat it as a database with one empty document. Several examples: - The method Data.doc(name) will return -1 (indicating the document doesn't exist) while Data.docs() will return an array of size 1 with the first value a 0 (indicating there is one document at pre value 0). This is actually my own problem because the API I'm writing relies on these two methods being internally consistent - I can't have one telling me there is one document called "XYZ" but then have the other refuse to give me a pre value for the "XYZ" document I was just told exists. - The GUI shows a single doc node in the tree view but issuing the command "list [database name]" shows the database as having no resources. - I can evaluate the query "insert node 'text' into doc('[initial document name]')" and it executes. I can see the new text node under the initial document in the GUI tree view. Now when I issue the command "list [database name]" I see 1 resource. Having the list command report different numbers of resources before and after a XQuery insertion seems odd. - If I issue the command "ADD TO newdoc <xyz/>", I can see the new doc("newdoc") node with the child <xyz> element in the GUI but the previously empty document is now gone. This also seems odd - I'm not sure how I feel about an ADD command removing data from the database (even if it was just intended to be a placeholder). In the end, I think BaseX should support the notion of a database with one empty document as being valid - there are probably cases where one might want to start their session in that state. I'm not sure what the solution is or should be (or if it's even something that is worth or needs solving). My own preference would be for the internal indication of an empty database to use a different node kind dedicated for that purpose so there is no confusion whether the single node at pre 0 is an empty initial document or an indication of an empty database. At the very least, I think the inconsistencies above should be corrected - if a single empty document node is intended to signify an empty database and is not actually intended to be part of the database, then you should not see it in the GUI, not be allowed to insert content to it, etc. Dave

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deadlock in BaseXServer 6.2.7
by Godmar Back 23 Jun '12

23 Jun '12

Hi, we're observing that our BaseXServer 6.2.7 deadlocks. The stack traces are here: http://top.cs.vt.edu/~gback/bx/deadlock-6.2.7/basex-deadlock.txt Could you take a look to see if these ring any bells? Has this problem been addressed in a more recent version? - Godmar

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function to give the current file being processed?
by jidanni＠jidanni.org 07 Jan '12

07 Jan '12

{comment {"Made by noise.xq, will get OVERWRITTEN"}} gives me $ basex noise.xq <?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://www.opengis.net/kml/2.2">  <Document>... Is there any function to enable me not to need to hardwire the name into the file?

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Re: [basex-talk] HTTP Request returns 413 FULL. Where is configuration file?
by Lukas Lewandowski 31 Dec '11

31 Dec '11

Good news. Lukas On Dec 31, 2011, at 2:08 AM, France Baril wrote: > I had not try, and though I still haven't, I think that has just answered my question… since it lead me to read this: "Maximum URL length is 2083 characters". Src: http://www.cs.tut.fi/~jkorpela/forms/methods.html#exc. > > > > On Wed, Dec 28, 2011 at 2:32 PM, Lukas Lewandowski <lukas.lewandowski(a)uni-konstanz.de> wrote: > Did you try to send your query via POST? > > > On Dec 28, 2011, at 5:24 PM, France Baril wrote: > >> I use Ruby >> The request is: >> searchquery = searchquery + s_paramlist >> uri = URI.parse("http://localhost:8984/rest/KnowledgeBase/Content?query=" + searchquery ) >> http = Net::HTTP.new(uri.host, uri.port) >> request = Net::HTTP::Get.new(uri.request_uri) >> request.basic_auth("user1", "user1") >> response = http.request(request) >> # decode allows query to return %26 and ruby to understand '&' as not '&' >> result=URI.decode(response.body) >> if (response.code != "200") >> @search = "ERROR: " + response.code + ' ' + response.message >> else >> @search = result.html_safe >> $currentsearch = @search >> end >> The query works when the list of topics under 'limit to' is short, not when it's long: >> xquery version "1.0"; >> declare variable $kwoperator as xs:string := "all"; >> (:For each topic type, create box:) >> <div style="font-size: 10pt;"> >> <form action="start" method="get"> >> <div> >> <input type="text" name="keywords" value="Search for..." size="42"/> >> {if ($kwoperator ='any') then >> <span><br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="all" /> Contains <b>all</b> these words <br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="any" checked="yes"/> Contains <b>any</b> of these words <br/> >> </span> >> else >> <span><br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="all" checked="yes" /> Contains <b>all</b> these words <br/> >> %26%23160%3B%0D%0A<input type="radio" name="kwoperator" value="any" /> Contains <b>any</b> of these words <br/> >> </span> >> } >> <input class="submit" type="submit" value="Search" /> >> <br/> >> </div> >> <div> >> <p><i>Limit topics to:</i></p> >> { for $x in distinct-values(//*[contains(@class, ' topic/topic ')]/name()) >> order by $x >> return <span>{"%26%23160%3B%0D%0A"}<input type="radio" name="topic" value="{$x}" />{concat(' ', $x)}<br/></span> >> } >> <input class="submit" type="submit" value="Refine" /> >> <br/> >> </div> >> </form> >> </div> >> >> Thanks, >> >> France >> >> On Wed, Dec 28, 2011 at 6:22 AM, Lukas Lewandowski <lukas.lewandowski(a)uni-konstanz.de> wrote: >> Hi France, >> >> I have several questions: >> >> What HTTP client do you use? >> Which HTTP method do you use? How does the request look like? >> How big is your data you want to store/request? >> >> regards >> Lukas >> >> On Dec 28, 2011, at 12:41 AM, France Baril wrote: >> >> > Hi, >> > >> > After about 2620 characters on a response for an HTTP:Request, I get a 413 FULL error. >> > >> > I looked at the .basex configuration file and at the httpserver startup options, but couldn't find a way to change configuration for response size. >> > >> > Should I be looking for the Jetty config? I searched for jetty.xml, but only found it under olderapp/jetty.xml. Nothing that resemble 'baseX/jetty.xml'. >> > >> > Do you know how I can resolve this issue? >> > >> > I'm on Mac OsX - Snow Leopard. >> > >> > Thanks, >> > >> > France >> > >> > _______________________________________________ >> > BaseX-Talk mailing list >> > BaseX-Talk(a)mailman.uni-konstanz.de >> > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >> >> >> >> >> -- >> France Baril >> Architecte documentaire / Documentation architect >> france.baril(a)architextus.com >> (514) 572-0341 > > > > > -- > France Baril > Architecte documentaire / Documentation architect > france.baril(a)architextus.com > (514) 572-0341

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HTTP Request returns 413 FULL. Where is configuration file?
by France Baril 28 Dec '11

28 Dec '11

Hi, After about 2620 characters on a response for an HTTP:Request, I get a 413 FULL error. I looked at the .basex configuration file and at the httpserver startup options, but couldn't find a way to change configuration for response size. Should I be looking for the Jetty config? I searched for jetty.xml, but only found it under olderapp/jetty.xml. Nothing that resemble 'baseX/jetty.xml'. Do you know how I can resolve this issue? I'm on Mac OsX - Snow Leopard. Thanks, France

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one text item per line output
by jidanni＠jidanni.org 26 Dec '11

26 Dec '11

Do I really need to do all this just to get one item per line $ basex -s format=no -q 'doc("...")//.../*:name/concat(text(),"
")' AM 594 復興1 AM 612 中央 AM 630 台灣 AM 657 正聲 I use -s format=no to turn off spaces. -s format=text not much help. There really ought to be a -s option to say I want newlines instead of spaces. In perl all we need is perl -l. OK, maybe Windows users also need CRLFs (\r\n).

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jdbc driver
by Francesco Beretta 26 Dec '11

26 Dec '11

Hi, I'm trying to initialize a connection to a postgresql database : Query: sql:init("org.postgresql.Driver") Error: [FOSQ0007] Could not initialize specified driver: 'org.postgresql.Driver' What is the right syntax to initialize the driver? Could you provide me with an exemple ? Where should I put the jdbc driver jar ? Many thanks Francesco Beretta

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Единая Дисконтная Система
by DISCOUNTKA 22 Dec '11

22 Dec '11

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Limit of namespaces per database
by Stefaniuk Marcin 22 Dec '11

22 Dec '11

I have fairly big set of webservice (WSDL+XSD). I'm considering switch from eXist to BaseX but when I'm trying to create database with initial import of the set but it stops after few elements. Limit of 256 namespaces is real shortcoming. Regards --- Marcin Stefaniuk PKO Bank Polski Departament Rozwoju Aplikacji Sprzedażowych i Wsparcia Wydział Rozwoju Platform Usług i Procesów Biznesowych Warszawa, ul. Puławska 15 tel. +48 22 580 30 39

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BaseX-Talk December 2011