BaseX-Talk

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6 participants
5269 discussions

bug? lock. is there some guild on how to do concurrent update in rexq service?
by easy 19 Dec '13

19 Dec '13

hi,all, This is the errror message: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7.2 Java: Sun Microsystems Inc., 1.6.0_24 OS: Linux, amd64 Stack Trace: java.lang.IllegalMonitorStateException: Thread already holds one or more locks. at org.basex.core.DBLocking.acquire(DBLocking.java:106) at org.basex.core.Context.register(Context.java:239) at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:69) at org.basex.http.restxq.RestXqModule.process(RestXqModule.java:108) at org.basex.http.restxq.RestXqFunction.process(RestXqFunction.java:100) at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:31) at org.basex.http.BaseXServlet.service(BaseXServlet.java:58) 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 :457) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j ava:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.jav a:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandl er.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandl er.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java: 384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandle r.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandle r.java:1009) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j ava: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(Abstrac tHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpC onnection.java:960) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.conten t(AbstractHttpConnection.java:1021) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnecti on.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEn dPoint.java:668) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEnd Point.java:52) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPoo l.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool .java:543) at java.lang.Thread.run(Thread.java:679) Improper use? Potential bug? Your feedback is welcome: -- 此致 easy 莫愁前路无知己，天下谁人不识君。

3 8

Successive update queries for restxq
by Tojo Rakotoarison 19 Dec '13

19 Dec '13

Hi, I would like to make successive updates on a database using RESTXQ. For example : db:create(...) then db:add(...) on the newly created database. But, it seems impossible to do it in the same query because of the order in which the functions are processed. Is there a workaround for that without asking the user to send two requests manually ? For example, if there could be a way to redirect to a new query or Restxq, or something like that. Thanks ! Best regards,

2 1

standalone or client/server for test scenario
by e-letter 19 Dec '13

19 Dec '13

Readers, For the scenario described elsewhere (http://www.mail-archive.com/talk@x-query.com/msg00786.html), which is correct to use please, standalone or clien/server modes, for initial testing? Is this choice important, or can be ignored?

2 3

initial installation observation
by e-letter 19 Dec '13

19 Dec '13

Readers, Basex772 jar file was installed into a directory /usr/local/basex A symbolic link was created: cat >> /usr/local/bin/basex java -jar /usr/local/basex/basex772.jar In normal user home directory, basex started from command terminal, but the command line options are not active, e.g. 'basex -h' does not show the help file in the command terminal, but starts basex standalone. Also command terminal 'basex -i /path/to/existing/xmlfile.xml' does not open the xml file, but starts basex.

2 3

Issues inserting nodes with @xml:lang
by France Baril 18 Dec '13

18 Dec '13

Hi, I am trying to figure out how to allow the use of @xml:lang in an .xqm. I've been using it before without the need to add any declaration, but in this case I am getting an error: Unexpected error: Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.7.2 Java: Apple Inc., 1.6.0_65 OS: Mac OS X, i386 Stack Trace: ... I am able to reproduce the error and get rid of it simply by adding or removing @xml:lang attributes in my content. I have attached a simple example, you'll need a db named tests to receive the result. - If you run the .xqm as is, you should get the unexpected error. - If you remove all @xml:lang="en-us" in the function test-nodes:get-trans-units-1(), the result node will be saved in the tests db. What am I missing? -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com (514) 572-0341

2 2

Array Size Exceptions
by Jeremy Moseley 17 Dec '13

17 Dec '13

Hi Guys, Running into some strange exceptions when trying to make changes to data in the database. The function is updating all attributes in a project to include lower case copies. When doing this on specific projects, it consistently fails with the stack trace below. Any thoughts? Cheers, Jeremy XQuery: (: Get all documents pertaining to this project :) let $docs := project:get-docs($shortname, $revision, $environment) > return ( > for $node in $docs/s9:toc//*[(@designation != "" and > not(@designation-lower)) > or (@enumeration != "" and > not(@enumeration-lower))] > return ( > prof:void(trace(base-uri($node), "Node Document: ")), > insert node (attribute { 'designation-lower' } { > lower-case($node/@designation) }) into $node, > insert node (attribute { 'enumeration-lower' } { > lower-case($node/@enumeration) }) into $node > ), > for $node in $docs/*[(@designation != "" and not(@designation-lower)) > or (@enumeration != "" and > not(@enumeration-lower))] > return ( > prof:void(trace(base-uri($node), "Node Document: ")), > insert node (attribute { 'designation-lower' } { > lower-case($node/@designation) }) into $node, > insert node (attribute { 'enumeration-lower' } { > lower-case($node/@enumeration) }) into $node > ), > for $node in $docs//*[(@title != "" and not(@title-lower))] > return ( > prof:void(trace(base-uri($node), "Node Document: ")), > insert node (attribute { 'title-lower' } { > lower-case($node/@title) }) into $node > ), > insert node (attribute {'optimized'} { "yes" }) into $collection, > prof:void(metrics:timing("optimize-attributes", "get", "200", > string(prof:current-ms() - $start))) > ) Stack Trace: > HTTP/1.1 500 Unexpected error: Improper use? Potential bug? Your feedback > is welcome: > Contact: basex-talk(a)mailman.uni-konstanz.de > Version: BaseX 7.7.2 > Java: Apple Inc., 1.6.0_65 > OS: Mac OS X, x86_64 > Stack Trace: > java.lang.NegativeArraySizeException > at org.basex.io.random.DataAccess.readBytes(DataAccess.java:200) > at org.basex.io.random.DataAccess.readToken(DataAccess.java:178) > at org.basex.io.random.DataAccess.readToken(DataAccess.java:169) > at org.basex.data.DiskData.txt(DiskData.java:267) > at org.basex.data.DiskData.text(DiskData.java:235) > at org.basex.index.value.DiskValues.readKeyAt(DiskValues.java:285) > at org.basex.index.value.DiskValues.get(DiskValues.java:441) > at > org.basex.index.value.UpdatableDiskValues.index(UpdatableDiskValues.java:66) > at org.basex.data.DiskData.indexEnd(DiskData.java:356) > at org.basex.data.Data.insert(Data.java:817) > at org.basex.data.Data.insertAttr(Data.java:672) > at org.basex.data.atomic.InsertAttr.apply(InsertAttr.java:31) > at > org.basex.data.atomic.AtomicUpdateList.applyStructuralUpdates(AtomicUpdateList.java:300) > at > org.basex.data.atomic.AtomicUpdateList.execute(AtomicUpdateList.java:288) > at org.basex.query.up.DatabaseUpdates.apply(DatabaseUpdates.java:184) > at org.basex.query.up.ContextModifier.apply(ContextModifier.java:103) > at org.basex.query.up.Updates.apply(Updates.java:120) > at org.basex.query.QueryContext.update(QueryContext.java:313) > at org.basex.query.QueryContext.value(QueryContext.java:297) > at org.basex.query.QueryContext.iter(QueryContext.java:282) > at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:73) > at org.basex.http.restxq.RestXqModule.process(RestXqModule.java:108) > at org.basex.http.restxq.RestXqFunction.process(RestXqFunction.java:100) > at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:31) > at org.basex.http.BaseXServlet.service(BaseXServlet.java:58) > 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:457) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) > at > org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:575) > at > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) > at > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) > at > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) > at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:276) > at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:103) > at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:118) > at org.basex.http.restxq.RestXqModule.process(RestXqModule.java:108) > at org.basex.http.restxq.RestXqFunction.process(RestXqFunction.java:100) > at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:31) > at org.basex.http.BaseXServlet.service(BaseXServlet.java:58) > 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:457) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) > at > org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:575) > at > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) > at > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) > at > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) > at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:276) > at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:103) > at org.basex.http.restxq.RestXqResponse.create(RestXqResponse.java:118) > at org.basex.http.restxq.RestXqModule.process(RestXqModule.java:108) > at org.basex.http.restxq.RestXqFunction.process(RestXqFunction.java:100) > at org.basex.http.restxq.RestXqServlet.run(RestXqServlet.java:31) > at org.basex.http.BaseXServlet.service(BaseXServlet.java:58) > 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:457) > 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:1075) > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) > at > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) > 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:489) > at > org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:949) > at > org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1011) > 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:668) > at > org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) > 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:695)

3 3

Performance questions
by José Tomás Atria 17 Dec '13

17 Dec '13

Dear all, I have a possibly dumb/trivial question with regards to resource utilization with BaseX. It's basically two things: 1) I'm working with a database that is smaller than the available memory in my main research machine. I noticed the MAINMEM option, but for some reason I couldn't get it to work, and then noticed that it would only affect newly created db's. Is it possible to tell BaseX to create a db in disk, and then load it into memory in full? would this increase performance? Would something like SET MAINMEM = true COPY DB 'diskDB' 'memDB' achieve something along these lines? 2) The machine I'm working on has a quad core processor. Is there anyway to process queries in parallel to take advantage of this? I made some superficial attempts through splitting queries and running them simultaneously, but it seems that the server is still confined to one cpu. I understand that adding multithreading support could be unnecesary and out of the scope of the project, but I thought of asking since I was already coming here to ask about memory. Thanks for any tips! jta. -- entia non sunt multiplicanda praeter necessitatem

2 2

restxq: default namespace and variable in path annotation don't like each other
by Jean-philippe Magué 17 Dec '13

17 Dec '13

Hello, We think we've found something that looks like a bug. In the minimal file test_A.xqm, we declare a default namespace and a function with a very simple path annotation (without variable). It works just fine. In test_B.xqm, we just declare a function with a variable in its path annotation. This is OK as well. In test_C.xqm, we declare both a default namespace and a path annotation with a variable. This raises a NullPointerException as you can see in error.html (which also provide version number informations). The choice between variables in path annotation and default element namespace is a difficult one! We'd like to use them both! Or are we missing something ? Best, Jean-Philippe -- Jean-Philippe Magué Maître de Conférences en Humanités Numériques Responsable de l'Atelier des Humanités Numériques : ahn.ens-lyon.fr Ecole Normale Supérieure de Lyon +33 (0)4 26 23 38 08 -- "Using computers will therefore lead us to a more profound and systematic knowledge of human expression; in principle, it can help us to be more humanistic than before." Busa, 1980.

2 3

Serializing unescaped xml to string
by Joe Templeman 16 Dec '13

16 Dec '13

Hi all, Is there a way to output unescaped XML to a string for debugging purposes? In unittests we would like to output the XML returned when a test fails, here is my example: declare %unit:test function elementinfo-test:test-element-info() { let $cases := <cases> <case> <comment>Failed input</comment> <input>input</input> <output> <result> output </result> </output> </case> </cases> for $case in $cases/case let $result := {some function which returns XML} let $u := unit:assert(deep-equal($case/output, result), $case/comment/text() || " Input: " || $case/input/text() || " Expected: " || fn:serialize($case/output) || " Got: " || fn:serialize($result)) return $u }; But when a test fails, I get escaped XML as the output. Is there any way to get this as actual XML? Thanks, Joe

4 10

how to release the database lock?
by easy 16 Dec '13

16 Dec '13

Hi.,sir, I have done some delete op when there are some update write op in basex. now, the db report error, can't open the db, say still another process has open the db. but I have down the db. so , how to restore the db? the data lost? Is there some way to restore the db in basex? Eagerly. Thanks -- 此致 easy 莫愁前路无知己，天下谁人不识君。

1 0

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