Hi, It took me ages, but I found the difference between trunk and precommit builds. Precommits are executed on hadoop* machines. There is a single build at a time. Trunks are executed on ubuntu* machines. There are two simultaneous builds.
For example, we have currently on ubuntu3: ubuntu3 <https://builds.apache.org/computer/ubuntu3/> 1 core-integration-testing-maven-3-jdk-1.6<https://builds.apache.org/job/core-integration-testing-maven-3-jdk-1.6/> #639<https://builds.apache.org/job/core-integration-testing-maven-3-jdk-1.6/639/> 2 HBase-TRUNK <https://builds.apache.org/job/HBase-TRUNK/> #4019<https://builds.apache.org/job/HBase-TRUNK/4019/> I suppose we can have two hbase builds on the same machine. Imho, that's why we have so many failures on trunk builds. Two solutions: - Use hadoop* for trunk builds. That's the best option imho, they seem cleaner then ubuntu* and less use. - When building trunk, use a very low parallel test factor. May be 2. Thoughts? Does anyone know how to do this? Nicolas
