👍 thanks As discussed on Slack I will open.a support case on CloudBees side to study the instability issue of linux agents. I will verify that there is nothing wrong in the new setup (but I found nothing bad personally which could create such issue) The major change when we compare ci-builds and ci-maven environments is that our agents are now running on Azure and sadly I heard about similar issues in others communities using Azure like Jenkins I will check if we can find a solution or if we can give enough details to Gavin to open a case on Azure side too. If we really don't find any solution with Azure we'll see with Gavin to deploy our agents somewhere else (but let's try to give a chance to Azure first)
Cheers On Tue, Jul 27, 2021 at 10:37 AM Gavin McDonald <gmcdon...@apache.org> wrote: > On Tue, Jul 27, 2021 at 10:18 AM Arnaud Héritier <aherit...@gmail.com> > wrote: > > > Gavin, these JDKs are only for build agents, right ? > > Tibor was asking for the JVM used to host Tomcat/Jenkins. > > (And I suppose that the controller part is templatised) > > > > Oh right, sorry, yes the client controllers use a system openjdk 8 > > > https://github.com/apache/infrastructure-p6/blob/production/modules/jenkins_client_master/manifests/init.pp > > > > On Mon, Jul 26, 2021 at 1:06 PM Gavin McDonald <gmcdon...@apache.org> > > wrote: > > > >> There are MANY JDKS installed already. Oracle JDKs OpenJDKs > AdoptOpenJDKs > >> - they are all already there. > >> > >> > https://cwiki.apache.org/confluence/display/INFRA/JDK+Installation+Matrix > >> > >> On Mon, Jul 26, 2021 at 11:47 AM Arnaud Héritier <aherit...@gmail.com> > >> wrote: > >> > >> > It has to be discussed with infra. > >> > I am not sure which distro is used. > >> > It's a Private Build of openJDK 8 (today CloudBees CI doesn't support > >> > something else than Java 8 - no comment) > >> > I don't have the feeling for now (with the data I reviewed) that it's > a > >> > memory / GC issue (it could create disconnections under high load) > >> > Here the stability issue occurs even when the controller does nothing > >> (the > >> > controller cannot ping the agent or vice and versa) and it seems to > >> impact > >> > more the linux agents than the windows ones (it's a pity) > >> > > >> > > >> > > >> > On Fri, Jul 23, 2021 at 12:06 AM Tibor Digana <tibordig...@apache.org > > > >> > wrote: > >> > > >> >> Can you install AdoptOpenJdk for the Jenkins controller? > >> >> It contains Eclipse OpenJ9 Garbage Collector and it significantly > >> >> decreases > >> >> memory consumption of the application due to the meta space goes to > the > >> >> disk. > >> >> You should save 40 - 75% out of 3GB. > >> >> I used G1, Shenandoah, ZGC and Eclipse OpenJ9 which saved the most > >> memory. > >> >> > >> >> On Thu, Jul 22, 2021 at 9:23 AM Arnaud Héritier <aherit...@gmail.com > > > >> >> wrote: > >> >> > >> >> > yes for the controller it depends of its size (number of jobs and > >> types > >> >> of > >> >> > jobs) but here we are fine it seems with our 3Gb > >> >> > > >> >> > * Java > >> >> > - Version: 1.8.0_292 > >> >> > - Maximum memory: 3.00 GB (3221225472) > >> >> > - Allocated memory: 3.00 GB (3221225472) > >> >> > - Free memory: 750.15 MB (786591664) > >> >> > - In-use memory: 2.27 GB (2434633808) > >> >> > - GC strategy: G1 > >> >> > - Available CPUs: 2 > >> >> > > >> >> > For agents I reduced the memory allocated to the agent process but > it > >> >> > doesn't help much (it seems - even if it is still a good thing to > do) > >> >> > > >> >> > What is strange is that I see our agents sometimes disconnected > even > >> >> when > >> >> > we have no activity on the jenkins controller > >> >> > > >> >> > Sadly jenkins is deployed on Apache Tomcat thus I cannot get access > >> to > >> >> its > >> >> > logs > >> >> > > >> >> > In general the connection lost is detected by what we call the > >> >> PingThread ( > >> >> > > >> >> > > >> >> > >> > https://www.jenkins.io/doc/book/system-administration/monitoring/#ping-thread > >> >> > ) but not only > >> >> > > >> >> > https://ci-maven.apache.org/log/all > >> >> > > >> >> > For example it was few minutes ago we got 3 agents disconnected > while > >> >> > nothing was running > >> >> > > >> >> > 2021-07-22 06:58:21.769+0000 [id=106291] INFO > >> >> > hudson.slaves.ChannelPinger$1#onDead: > >> >> > Ping failed. Terminating the channel maven4. > >> >> > java.util.concurrent.TimeoutException: Ping started at > 1626936861769 > >> >> hasn't > >> >> > completed by 1626937101769 > >> >> > at hudson.remoting.PingThread.ping(PingThread.java:134) > >> >> > at hudson.remoting.PingThread.run(PingThread.java:90) > >> >> > 2021-07-22 06:58:21.778+0000 [id=106292] INFO > >> >> > hudson.slaves.ChannelPinger$1#onDead: > >> >> > Ping failed. Terminating the channel maven3. > >> >> > java.util.concurrent.TimeoutException: Ping started at > 1626936861777 > >> >> hasn't > >> >> > completed by 1626937101778 > >> >> > at hudson.remoting.PingThread.ping(PingThread.java:134) > >> >> > at hudson.remoting.PingThread.run(PingThread.java:90) > >> >> > 2021-07-22 06:58:21.983+0000 [id=106295] INFO > >> >> > hudson.slaves.ChannelPinger$1#onDead: > >> >> > Ping failed. Terminating the channel maven5. > >> >> > java.util.concurrent.TimeoutException: Ping started at > 1626936861982 > >> >> hasn't > >> >> > completed by 1626937101983 > >> >> > at hudson.remoting.PingThread.ping(PingThread.java:134) > >> >> > at hudson.remoting.PingThread.run(PingThread.java:90) > >> >> > > >> >> > @Gavin McDonald <gmcdon...@apache.org> In terms of network, is it > >> the > >> >> same > >> >> > environment we use today compared to the ci-builds.apache.org > >> >> environment > >> >> > ? > >> >> > > >> >> > > >> >> > On Wed, Jul 21, 2021 at 11:48 PM Tibor Digana < > >> tibordig...@apache.org> > >> >> > wrote: > >> >> > > >> >> > > In my company, I also used 1GB for Xmx of Java Heap for the > Jenkins > >> >> JVM > >> >> > and > >> >> > > it was enough. > >> >> > > The subprocesses like Maven need to have much more memory to > >> allocate > >> >> for > >> >> > > themself rather than Jenkins JVM. > >> >> > > T > >> >> > > > >> >> > > On Wed, Jul 21, 2021 at 6:38 PM Arnaud Héritier < > >> aherit...@gmail.com> > >> >> > > wrote: > >> >> > > > >> >> > > > I am looking at our builds and I try to understand why our > agents > >> >> are > >> >> > > often > >> >> > > > disconnected during the builds. > >> >> > > > We have in general a stacktrace like > >> >> > > > > >> >> > > > maven6 was marked offline: Connection was broken: > >> >> java.io.IOException: > >> >> > > > Pipe closed after 0 cycles > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > org.apache.sshd.common.channel.ChannelPipedInputStream.read(ChannelPipedInputStream.java:118) > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > org.apache.sshd.common.channel.ChannelPipedInputStream.read(ChannelPipedInputStream.java:101) > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:92) > >> >> > > > at > >> >> > > > > >> >> > > >> >> > >> > hudson.remoting.ChunkedInputStream.readHeader(ChunkedInputStream.java:73) > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > hudson.remoting.ChunkedInputStream.readUntilBreak(ChunkedInputStream.java:103) > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > hudson.remoting.ChunkedCommandTransport.readBlock(ChunkedCommandTransport.java:39) > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34) > >> >> > > > at > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63) > >> >> > > > > >> >> > > > > >> >> > > > > >> >> > > > As far I can see we are using 16Gb "hosts" for linux agents > >> >> > > > > >> >> > > > Something very strange is that the jenkins agent (this small > >> >> component > >> >> > > > doing the link between the build host and the controller) is > >> >> configured > >> >> > > > with `-Xms8g -Xmx8g` thus we are reserving for it 50% of the > >> server > >> >> mem > >> >> > > > (even more because of the non-heap) > >> >> > > > This one in general should require in general really less. 1Gb > is > >> >> > > already a > >> >> > > > lot from my exp. > >> >> > > > Due to this, the OS can see it has the biggest process on the > >> host > >> >> and > >> >> > > > decide to kill it when the rest of the memory is used by the > >> build. > >> >> > > > I think we should decrease this value. > >> >> > > > (I can do it but I don't know how was configured the > >> ci.apache.org > >> >> > > agents > >> >> > > > and I would like to not add more issue if this setting was here > >> in > >> >> the > >> >> > > past > >> >> > > > > >> >> > > > I don't think it is the root cause of our instabilities (at > least > >> >> all) > >> >> > > and > >> >> > > > there is something else I have to find but it's a cheap fix to > >> try > >> >> > > > > >> >> > > > FYI our agents VMs are ~like this today: > >> >> > > > > >> >> > > > - Java > >> >> > > > + Home: `/usr/local/asfpackages/java/oraclejdk-1.8.0-291/jre` > >> >> > > > + Vendor: Oracle Corporation > >> >> > > > + Version: 1.8.0_291 > >> >> > > > + Maximum memory: 7.67 GB (8232370176) > >> >> > > > + Allocated memory: 7.67 GB (8232370176) > >> >> > > > + Free memory: 6.03 GB (6470953760) > >> >> > > > + In-use memory: 1.64 GB (1761416416) > >> >> > > > + GC strategy: ParallelGC > >> >> > > > + Available CPUs: 4 > >> >> > > > > >> >> > > > 8Gb is reserved, 1Gb is used (because the GC does nothing as > the > >> >> Free > >> >> > mem > >> >> > > > is high) > >> >> > > > > >> >> > > > I would be in favor to try to launch them with -Xms128m > >> >> > > > -Xmx1g -XX:+UseG1GC -XX:+UseStringDeduplication > >> >> > > > > >> >> > > > I think it's enough customization to start with > >> >> > > > > >> >> > > > Cheers > >> >> > > > > >> >> > > > On Wed, Jul 21, 2021 at 1:28 PM Arnaud Héritier < > >> >> aherit...@gmail.com> > >> >> > > > wrote: > >> >> > > > > >> >> > > > > I am not sure about the setup > >> >> > > > > AFAICS we don't use any JDK installer ( > >> >> > > > > https://ci-maven.apache.org/configureTools/ ) thus I suppose > >> that > >> >> > the > >> >> > > > > different JDKs are supposed to be installed directly on the > >> agent > >> >> ? > >> >> > > > > I am not sure how it was done on the previous environment > >> >> > > > > > >> >> > > > > On Sun, Jul 18, 2021 at 5:30 PM Tibor Digana < > >> >> tibordig...@apache.org > >> >> > > > >> >> > > > > wrote: > >> >> > > > > > >> >> > > > >> The new CI system has the following issue: > >> >> > > > >> > >> >> > > > >> /home/jenkins/tools/java/latest1.7/bin/java: not found > >> >> > > > >> > >> >> > > > >> > >> >> > > > >> > >> >> > > > > >> >> > > > >> >> > > >> >> > >> > https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven-surefire/job/master/104/execution/node/183/log/ > >> >> > > > >> > >> >> > > > >> > >> >> > > > >> > >> >> > > > >> On Wed, Jun 30, 2021 at 8:03 PM Gavin McDonald < > >> >> > gmcdon...@apache.org> > >> >> > > > >> wrote: > >> >> > > > >> > >> >> > > > >> > Hi Maven folks. > >> >> > > > >> > > >> >> > > > >> > Infra has decided to separate off the Maven build jobs > from > >> >> > > > >> > ci-builds.apache.org over to its very own Jenkins > >> Controller > >> >> and > >> >> > > > >> Agents. > >> >> > > > >> > > >> >> > > > >> > This means that Maven now has a dedicated Jenkins > >> environment > >> >> for > >> >> > > > >> itself. > >> >> > > > >> > It > >> >> > > > >> > also means that no other projects build jobs can build on > >> the > >> >> > Maven > >> >> > > > >> nodes; > >> >> > > > >> > and > >> >> > > > >> > then Maven jobs will no longer be able to build on the > >> >> ci-builds > >> >> > > > jobs. > >> >> > > > >> > > >> >> > > > >> > Your new Controller is set up as > >> https://ci-maven.apache.org > >> >> and > >> >> > > all > >> >> > > > >> Maven > >> >> > > > >> > Committers > >> >> > > > >> > can login via LDAP and create jobs. > >> >> > > > >> > > >> >> > > > >> > At the time of writing, there is one node/agent attached > >> but I > >> >> am > >> >> > > > >> building > >> >> > > > >> > 4 more - all > >> >> > > > >> > Ubuntu 20.04 and based in our Azure account. > >> >> > > > >> > > >> >> > > > >> > We can automagically move all your jobs over from > ci-builds > >> to > >> >> > > > ci-maven > >> >> > > > >> - I > >> >> > > > >> > just need someone to tell me go ahead and do it. > >> >> > > > >> > > >> >> > > > >> > In the meantime, feel free to have a test. The remaining 4 > >> >> agents > >> >> > > will > >> >> > > > >> be > >> >> > > > >> > online > >> >> > > > >> > by tomorrow. We will review after a month if 5 is enough > >> nodes. > >> >> > > > >> > > >> >> > > > >> > As with other projects having their own dedicated > >> controller, > >> >> who > >> >> > > have > >> >> > > > >> > taken advantage > >> >> > > > >> > of this isolation by having some nodes/agents given to the > >> >> project > >> >> > > as > >> >> > > > a > >> >> > > > >> > 'targeted donation' > >> >> > > > >> > so someone here may know of a Company will to donate 5 - > 10 > >> or > >> >> > more > >> >> > > > >> nodes > >> >> > > > >> > specifically > >> >> > > > >> > for Maven Jenkins environment. Infra can afford to hand > you > >> >> over 5 > >> >> > > > right > >> >> > > > >> > now. > >> >> > > > >> > > >> >> > > > >> > Let me know if you have any questions, otherwise let me > know > >> >> when > >> >> > I > >> >> > > > can > >> >> > > > >> > make the > >> >> > > > >> > transfer of your jobs. > >> >> > > > >> > > >> >> > > > >> > Thanks > >> >> > > > >> > > >> >> > > > >> > -- > >> >> > > > >> > > >> >> > > > >> > *Gavin McDonald* > >> >> > > > >> > Systems Administrator > >> >> > > > >> > ASF Infrastructure Team > >> >> > > > >> > > >> >> > > > >> > >> >> > > > > > >> >> > > > > > >> >> > > > > -- > >> >> > > > > Arnaud Héritier > >> >> > > > > Twitter/Skype : aheritier > >> >> > > > > > >> >> > > > > >> >> > > > > >> >> > > > -- > >> >> > > > Arnaud Héritier > >> >> > > > Twitter/Skype : aheritier > >> >> > > > > >> >> > > > >> >> > > >> >> > > >> >> > -- > >> >> > Arnaud Héritier > >> >> > Twitter/Skype : aheritier > >> >> > > >> >> > >> > > >> > > >> > -- > >> > Arnaud Héritier > >> > Twitter/Skype : aheritier > >> > > >> > >> > >> -- > >> > >> *Gavin McDonald* > >> Systems Administrator > >> ASF Infrastructure Team > >> > > > > > > -- > > Arnaud Héritier > > Twitter/Skype : aheritier > > > > > -- > > *Gavin McDonald* > Systems Administrator > ASF Infrastructure Team > -- Arnaud Héritier Twitter/Skype : aheritier
