January 2022 - armedbear-devel - mailman3.common-lisp.net

Setting different class loader
by Steven Nunez 06 Feb '23

06 Feb '23

Greetings all, I have what I think is a problem with the ABCL class loader. I am working with a 'big data' library, Spark, but run into an issue on line 2 of the programming guide example. I am able to load the JARs from Maven with the ASDF system definition: (asdf:defsystem #:spark :description "Wrapper for Spark 3.0" :serial t :defsystem-depends-on (abcl-asdf) :depends-on (#:jss #:javaparser) :components ((:mvn "org.apache.spark/spark-core_2.12" :version "3.0.0") (:file "package") (:file "spark"))) and can create a SparkConf object: (defvar *spark-conf* #1"new SparkConf() .setAppName("abcl-app") .setMaster("local")" ) But when I try to create a 'context' (defvar *sc* (new 'JavaSparkContext *spark-conf*)) I get an error in the initialisation: Java exception 'java.lang.NoClassDefFoundError: Could not initialize class org.apache.spark.package$'. There isn't much on this except from the Jenkins guys, who have attempted to put Spark and Spark applications into a CI system. They seem to think that it's related to a call to get a properties file in the package class and on a StackOverflow discussion suggested that "you should make sure that you set the classloader that Spark was loaded through using the Thread.currentThread().setContextClassLoader(myCustomLoader) call". I've verified with (java:dump-classpath) that the JAR is on the ABCL classpath, and the JAR file does contain the spark-version-info.properties file. I've also tried getting the file myself with: (defvar rs #1"Thread.currentThread() .getContextClassLoader() .getResourceAsStream("spark-version-info.properties")" ) which returns nil, so their theory may be correct. Messing around with class loaders is a bit beyond my 20 year old Java knowledge so I thought I'd ask here if anyone has any ideas on how I can load Spark in way to use the default Java class loader. Alternatively it occurs to me to ask why the ABCL class loader isn't able to find the properties file if the JAR is on the classpath and then to correct whatever that problem is. Cheers, Steve

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[Extended Deadline] 15th European Lisp Symposium
by Didier Verna 24 Jan '22

24 Jan '22

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 15th European Lisp Symposium Call for Papers March 21-22, 2022 FEUP, Porto, Portugal & Online In co-location with <Programming> https://www.european-lisp-symposium.org/2022 Sponsored by EPITA and Franz Inc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Important Dates ~~~~~~~~~~~~~~~ - Submission deadline ***EXTENDED***: January 30, 2022 - Author notification: February 21, 2022 - Final papers due: March 7, 2022 - Symposium: March 21-22, 2022 Scope ~~~~~ The European Lisp Symposium is a premier forum for the discussion and dissemination of all aspects of design, implementation and application of any of the Lisp dialects, including Common Lisp, Scheme, Emacs Lisp, Clojure, Racket, ACL2, AutoLisp, ISLISP, Dylan, SKILL, Hy, Shen, Carp, Janet, uLisp, Picolisp, Gamelisp, TXR, and so on. We encourage everyone interested in Lisp to participate. The European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications, and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - context-, aspect-, domain-oriented and generative programming - macro-, reflective-, meta- and/or rule-based development approaches - language design and implementation - language integration, inter-operation and deployment - development methodologies, support and environments - educational approaches and perspectives - experience reports and case studies Technical Program ~~~~~~~~~~~~~~~~~ We invite submissions in the following forms. * Papers: technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. * Demonstrations: abstracts of up to 4 pages for demonstrations of tools, libraries, and applications. * Tutorials: abstracts of up to 4 pages for in-depth presentations about topics of special interest for at least 90 minutes and up to 180 minutes. All submissions should be formatted following the ACM SIGS guidelines and include ACM Computing Classification System 2012 concepts and terms. Submissions should be uploaded to Easy Chair, at the following link http://www.easychair.org/conferences/?conf=els2022. Note: to help us with the review process please indicate the type of submission by entering either "paper", "demo", or "tutorial" in the Keywords field. Programme Chair ~~~~~~~~~~~~~~~ Jim Newton - EPITA Research Lab (LRDE), France Programme Committee ~~~~~~~~~~~~~~~~~~~ Philipp Meier, Nubank Ioanna M. Dimitriou H., Igalia Mikhail Raskin, Technical University of Munich Nick Levine, RavenPack Adrien Pommellet, LRDE, EPITA Marco Heisig, FAU Erlangen-Nürnberg Alberto Riva, Bioinformatics Core, ICBR, University of Florida Marco Antoniotti, DISCo, Università degli Studi di Milano-Bicocca Nicolas Neuss, Friedrich-Alexander-Universität Erlangen Christophe Rhodes, Google Irène Anne Durand, LaBRI, University of Bordeaux Ralf Moeller Breanndán Ó Nualláino, University of Amsterdam Marc Battyani, Fractal Concept Pascal Costanza, Intel -- Didier Verna <didier(a)elsaa.org> ELS Steering Committee

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[Last CfP] 15th European Lisp Symposium, March 21-22 2022, Porto
by Didier Verna 11 Jan '22

11 Jan '22

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 15th European Lisp Symposium Call for Papers March 21-22, 2022 FEUP, Porto, Portugal & Online In co-location with <Programming> https://www.european-lisp-symposium.org/2022 Sponsored by EPITA and Franz Inc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Important Dates ~~~~~~~~~~~~~~~ - Submission deadline: January 23, 2022 - Author notification: February 21, 2022 - Final papers due: March 7, 2022 - Symposium: March 21-22, 2022 Scope ~~~~~ The European Lisp Symposium is a premier forum for the discussion and dissemination of all aspects of design, implementation and application of any of the Lisp dialects, including Common Lisp, Scheme, Emacs Lisp, Clojure, Racket, ACL2, AutoLisp, ISLISP, Dylan, SKILL, Hy, Shen, Carp, Janet, uLisp, Picolisp, Gamelisp, TXR, and so on. We encourage everyone interested in Lisp to participate. The European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications, and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - context-, aspect-, domain-oriented and generative programming - macro-, reflective-, meta- and/or rule-based development approaches - language design and implementation - language integration, inter-operation and deployment - development methodologies, support and environments - educational approaches and perspectives - experience reports and case studies Technical Program ~~~~~~~~~~~~~~~~~ We invite submissions in the following forms. * Papers: technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. * Demonstrations: abstracts of up to 4 pages for demonstrations of tools, libraries, and applications. * Tutorials: abstracts of up to 4 pages for in-depth presentations about topics of special interest for at least 90 minutes and up to 180 minutes. All submissions should be formatted following the ACM SIGS guidelines and include ACM Computing Classification System 2012 concepts and terms. Submissions should be uploaded to Easy Chair, at the following link http://www.easychair.org/conferences/?conf=els2021. Note: to help us with the review process please indicate the type of submission by entering either "paper", "demo", or "tutorial" in the Keywords field. Programme Chair ~~~~~~~~~~~~~~~ Jim Newton - EPITA Research Lab, France Programme Committee ~~~~~~~~~~~~~~~~~~~ Philipp Meier, Nubank Ioanna M. Dimitriou H., Igalia Mikhail Raskin, Technical University of Munich Nick Levine, RavenPack Adrien Pommellet, EPITA Research Lab Marco Heisig, FAU Erlangen-Nürnberg Alberto Riva, Bioinformatics Core, ICBR, University of Florida Marco Antoniotti, DISCo, Università degli Studi di Milano-Bicocca Nicolas Neuss, Friedrich-Alexander-Universität Erlangen Christophe Rhodes, Google Irène Anne Durand, LaBRI University of Bordeaux Ralf Moeller Breanndán Ó Nualláin Marc Battyani, Fractal Concept Pascal Costanza, Intel, Belgium -- Didier Verna

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Considering resignation as maintainer
by Robert Goldman 10 Jan '22

10 Jan '22

I have discovered that Stas Bokuraev is continuing to refuse to update Edi packages to modern ASDF system-naming. This would not be bad in and of itself, because these are open source systems, and they can be forked. What *is* bad is that he has publicly stated that he is doing this hoping that the resulting warnings will break people's systems and thus cause them to get angry and complain to me about ASDF checking system names. What is even worse is that the CL community tacitly accepts this as normal behavior. I would like to see the CL open source community pause and consider what constitutes a healthy community. I don't believe that someone trying to break things in order to pressure a volunteer maintainer of infrastructure is something that a healthy community should accept. If the community prefers a more rough-and-tumble approach, I can accept that, but if so it's time for the community to find an ASDF maintainer who is more in harmony with the values it (at least implicitly) espouses.

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