John Vines created MASSEMBLY-866:
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Summary: poor performance of jar-with-dependencies when run in
same run as docbook
Key: MASSEMBLY-866
URL: https://issues.apache.org/jira/browse/MASSEMBLY-866
Project: Maven Assembly Plugin
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: John Vines
I apologize for the lack of information, but we have a large build environment
which I cannot share, but I'll try to explain things as best I can.
In our full build path, we have 2 components that I've found have side effects.
One is a doc build which uses the docbkx-maven-plugin
(https://github.com/mimil/docbkx-tools) to generate documentation (and usually
takes a while, ~27 minutes) and another which builds a jar-with-depends for our
UI. Prior to upgrade the assembly plugin to 3.0.0 from 2.3 or 2.5 (I cannot
recall) everything ran fine. After upgrading we found our jenkins builds taking
about 40 more minutes, most of this change was in maven-assembly-plugin for
that UI jar-with-dependencies
{code}assembly-plugin:3.0.0:single (make-assembly) @ sqrrl-web-dist-ui ---
16:17:37 [INFO] Reading assembly descriptor: src/main/assembly/dist-ui.xml
16:17:40 [INFO] Building jar:
/var/lib/jenkins/workspace/sqrrl-master-build/web/dist-ui/target/sqrrl-web-dist-ui-2.8.0-SNAPSHOT-jar-with-dependencies.jar
17:01:54 [INFO] {code}
Eventually I isolated to a case where just that doc and that jar-with-deps
being built would cause the jar-with-deps to take ~40 minutes, but if I built
it by itself (all other maven options being equal) it would take about 1.5
minutes.
I'm honestly not too familiar with the inner workings of this plugin, nor the
maven docbook plugin, but my hunch was that the docbook plugin was 'corrupting'
or otherwise altering the main maven jvm in such a way to cause this. It does
use some really old plexus plugins, among others, afterall. However, I stumbled
across MASSEMBLY-424 and tested forking maven-assembly-plugin:3.0.0 and
updating plexus-archiver to 3.5, plexus-io to 3.0.0 and plexus-utils to 3.1.0
and ran my 2 module build with the custom plugin and it ran just as quick as
being run standalone (1.5minutes). (To build it with those plugins I had to
disable checkstyle and enforcer though since at least one of those plugins
versions was java7)
One last datapoint is that in our jar-with-deps we are including bouncycastle's
bcpix and bcprov and explicitly excluding them from the jar-with-depends also
made that 2 module build faster (but not as fast), so I'm not 100% sure it's
the docbook plugin was the catalyst there.
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