Affects Version/s: 3.1.1, 3.2.1, 3.2.2, 3.2.5
Fix Version/s: 4.x / Backlog
Environment:SLES 3.0.80-0.7-default SMP x86_64 GNU/Linux Oracle HotSpot JDK 7u25
windows server 2008 x64 Oracle HotSpot JDK 7u65/8u25
We have a large project of 300+ modules which regularly fails with different kind of errors in different places. The issue is reliably reproduced with parallel build and is not happens in single threaded. The optimal concurrency level for our project ~10 threads. At this level ~%20 of builds fail. To workaround the issue we reduced concurrency to 4 in development builds and reverted production build to 1 thread.
Main point of failures:
- Surefire ClassNotFound. Reported and investigated in
SUREFIRE-1132. Points to a problem with MavenProject#getArtifacts - empty set unexpectedly returned.
- Compiler - unexpected failure because of incorrect classpath (literally all dependencies are not on the classpath), like:
- Jar - unexpected NPE. Reported with stack traces in
MJAR-192. (assembly plusgin seems to be also affected)
At this point the issue looks like problem with MavenProject#getArtifacts in concurrent builds.
To help with the issue im happy to implement or evaluate any custom assembly to trace this down. Unfortunately i cannot submit my project - it is proprietary.
Thanks in advance, Alexander