Re: [tycho-user] JVM Crash during Tycho build

[Mikhail Kalkov <mikhail.kalkov@xxxxxxxxx>]

I've seen exactly this stack trace once while building a project with tycho 0.23.0, maven 3.3.3, java8u51 on 64bit RHEL6. I was really surprized by the crash but since it was not reproducible I didn't waste time investigating it. I am quite sure that the maven repo was private but don't recall if I was running on ext4 or nfs3 file system (nfs is more likely). I don't think that I have the crashdump left lying around, but we run ~100 multi-project builds per day and I haven't seen this failure more during the last month, so it seems to be pretty rare.

Btw, comments to the linked JDK issue indicate that memory mapping is disabled by default since java 6u45. So, I'm not sure what is affected by the mentioned workaround.

Kind regards,
Mikhail Kalkov

2015-09-30 14:05 GMT+02:00 Aurélien Pupier <aurelien.pupier@xxxxxxxxxxxxxx>:

Hi Jan,

thanks for the answer.
We are using a shared maven repository but we manage locks at job level which should prevent concurrent jobs on the same Maven repo for Tycho artefacts.

regards,

2015-09-30 9:42 GMT+02:00 Sievers, Jan <jan.sievers@xxxxxxx>:

any chance you have concurrent build jobs using the same local maven repo?
use a private local maven repo per job

Jan

On 30/09/15 09:29, "tycho-user-bounces@xxxxxxxxxxx on behalf of Aurélien
Pupier" <tycho-user-bounces@xxxxxxxxxxx on behalf of
aurelien.pupier@xxxxxxxxxxxxxx> wrote:

>Hi,
>
>I would like to know if others encounter a JVM crash during Tycho build.
>It is a
>JVM bug <http://bugs.java.com/view_bug.do?bug_id=4425695> when a jar is
>read and write simultaneously. It seems that it exists a workaround only
>on Oracle VM (-Dsun.zip.disableMemoryMapping=true) In our CI, the
> crash occurs 3 to 10 times per month.
>
>Does someone else encounter this issue?
>If several people are concerned, it might worth to modify algorithm on
>Tycho side to avoid the issue.
>
>Regards,
>
>
>just an extract of some lines of the crash report:
>
>
>Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
>J 2199  java.util.zip.ZipFile.getNextEntry(JI)J (0 bytes) @
>0x00007f6e5d43af64 [0x00007f6e5d43af20+0x44]
>J 2196 C2 java.util.zip.ZipFile$1.nextElement()Ljava/lang/Object; (5
>bytes) @ 0x00007f6e5d5f8840 [0x00007f6e5d5f8760+0xe0]
>J 2872 C2
>org.eclipse.jdt.internal.compiler.batch.ClasspathJar.isPackage(Ljava/lang/
>String;)Z (146 bytes) @ 0x00007f6e5d679064 [0x00007f6e5d678b80+0x4e4]
>
>--
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Aurelien Pupier  R&D Engineer, BonitaBPM Studio Development Leader aurelien.pupier@xxxxxxxxxxxxxx apupier 32, rue Gustave Eiffel - 38000 Grenoble, France Download Bonita BPM | Access BPM Quick Start Center
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