vorburger

https://github.com/fabric8io-images/s2i/issues/206
https://github.com/fabric8io-images/s2i/issues/172

(09:59:45  CET) vorburger: hello people of CentOS. I'm observing a VERY strange thing possibly related to the CentOS 7.6 container image release earlier today, full story is https://github.com/fabric8io-images/s2i/issues/206, the gist of it is:
(10:01:20  CET) vorburger: it looks to me like old stable 7.5.1804 on https://hub.docker.com/r/library/centos/tags/ got replaced with 7.6.1810 a few hours ago today, despite 7.5.1804 saying (on the UI) it hasn't changed in 2 months
(10:02:06  CET) billings: vorburger: Step 7/37 : RUN yum install -y        unzip        java-1.8.0-openjdk-1.8.0.181-3.b13.el7_5
(10:02:27  CET) billings: why is it installing a specific version of openjdk?  That's why it doesn't work.  That version isn't in 7.6.
(10:03:03  CET) billings: https://github.com/fabric8io-images/s2i/blob/master/java/images/centos/Dockerfile this needs to be fixed, hopefully by someone who understands how to use 

vorburger

2018-09-05T15:20:10,380 | ERROR | Time-limited test | SingleFeatureTest                | 78 - PAXEXAM-PROBE-1476aac8-86ea-4d97-9ec2-62e234288c3f - 0.0.0 | installFeature() failed
org.osgi.service.resolver.ResolutionException: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=odl-etcd-demo-restconf; type=karaf.feature; version="[0.0.1.SNAPSHOT,0.0.1.SNAPSHOT]"; filter:="(&(osgi.identity=odl-etcd-demo-restconf)(type=karaf.feature)(version>=0.0.1.SNAPSHOT)(version<=0.0.1.SNAPSHOT))" [caused by: Unable to resolve odl-etcd-demo-restconf/0.0.1.SNAPSHOT: missing requirement [odl-etcd-demo-restconf/0.0.1.SNAPSHOT] osgi.identity; osgi.identity=odl-restconf; type=karaf.feature; version="[1.9.0.SNAPSHOT,1.9.0.SNAPSHOT]" [caused by: Unable to resolve odl-restconf/1.9.0.SNAPSHOT: missing requirement [odl-restconf/1.9.0.SNAPSHOT] osgi.identity; osgi.identity=org.opendaylight.netconf.restconf-nb-bierman02-auth; type=osgi.bundle; version="[1.9.0.SNAPSHOT,1.9.0.SNAPSHOT]"; resolution:=mandatory 

vorburger

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 1K bytes over 1 Gbps network ....... 10,000 ns  =  10 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

vorburger

https://github.com/github/hub/issues/1708

$ git config -l --show-origin | grep vorburger

file:/home/vorburger/.gitconfig	user.name=Michael Vorburger
file:/home/vorburger/.gitconfig	user.email=mike@vorburger.ch
file:/home/vorburger/.gitconfig	credential.helper=store
file:/home/vorburger/.gitconfig	core.autocrlf=input
file:/home/vorburger/.gitconfig	core.eol=native
file:/home/vorburger/.gitconfig	core.excludesfile=/home/vorburger/.gitignore_global

vorburger

https://github.com/minishift/minishift-centos-iso/issues/259


wget --continue https://github.com/minishift/minishift-centos-iso/releases/download/v1.12.0/minishift-centos7.iso 
--2018-08-09 18:34:23--  https://github.com/minishift/minishift-centos-iso/releases/download/v1.12.0/minishift-centos7.iso
Resolving github.com (github.com)... 192.30.253.112, 192.30.253.113
Connecting to github.com (github.com)|192.30.253.112|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://github-production-release-asset-2e65be.s3.amazonaws.com/69853246/922b03d8-8452-11e8-9dcd-92e33542c976?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20180809%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20180809T163423Z&X-Amz-Expires=300&X-Amz-Signature=839541773ed08c00400edcace7a68ad77caf9f05dc590ad76257f3138c098751&X-Amz-SignedHeaders=host&actor_id=0&response-content-disposition=attachment%3B%20filename%3Dminishift-centos7.iso&response-content-type=application%2Foctet-stream [followin

vorburger

https://bugzilla.redhat.com/show_bug.cgi?id=1597304

Jun 27, 2018 10:00:15 AM org.apache.karaf.main.Main launch
INFO: Installing and starting initial bundles
Jun 27, 2018 10:00:15 AM org.apache.karaf.main.Main launch
INFO: All initial bundles installed and set to start
Jun 27, 2018 10:00:16 AM org.apache.karaf.main.lock.SimpleFileLock lock
INFO: Trying to lock /opt/opendaylight/lock
Jun 27, 2018 10:00:16 AM org.apache.karaf.main.lock.SimpleFileLock lock
INFO: Lock acquired

vorburger

Re. https://github.com/eclipse/xtext-xtend/issues/493

in ODL/git/netvirt/aclservice/impl

with this changed locally:

    <plugin>
        <groupId>org.eclipse.xtend</groupId>
        <artifactId>xtend-maven-plugin</artifactId>
        <dependencies>

vorburger

Executing bootstrap tasks
OpenJDK Runtime Environment 1.8.0_171-b10
Product org.eclipse.products.epp.package.java.latest
Workspace /home/vorburger/eclipse-test/ws
Project org.opendaylight.empty.master
Bundle org.eclipse.oomph.setup 1.9.0.v20180421-1024, build=3502, branch=a3ffd1307564e51e3c406c3e2744bc282019b050
Bundle org.eclipse.oomph.setup.core 1.9.0.v20180425-0647, build=3502, branch=a3ffd1307564e51e3c406c3e2744bc282019b050
Bundle org.eclipse.oomph.setup.installer 1.9.0.v20180426-1142, build=3502, branch=a3ffd1307564e51e3c406c3e2744bc282019b050
Bundle org.eclipse.oomph.setup.p2 1.9.0.v20180419-0636, build=3502, branch=a3ffd1307564e51e3c406c3e2744bc282019b050
Performing Workspace /home/vorburger/eclipse-test/ws

vorburger

Teaching programming to children using Minecraft on OpenShift/Kubernetes

When we were younger, getting enthusiastic about programming and computers in general was a lot easier than it is now. They where these "magical" machines that would do whatever you wanted them to do. Today, computers are in everybody's day to day lives and have lost that "magical" feeling. The challenge is to get children excited about programming by reducing the time to setup and learning concepts, but get started right away with something they love - like Minecraft! We'll show you how with Kubernetes, OpenShift and Minecraft we can progressively do just - at first using our ScratchX extension to get started with graphical programming, and then with a push on a button you can have a full Java development environment set up to start learning and teaching programming. We set up an Eclipse Che IDE with continuous builds of the modifications, and a Minecraft server with our OSGi extension that can hot reload changes, so that we can ha

vorburger

    @Test
    public void testBasicWait() throws InterruptedException, ExecutionException {
        long millis = 500;
        final AtomicReference<Future<?>> futureRef = new AtomicReference<>();
        testAndVerifyTimeBounds(executorService ->
            futureRef.set(executorService.submit(() -> {
                try {
                    Thread.sleep(millis);
                } catch (InterruptedException e) {
                    // Ignored